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Submitted:
29 August 2023
Posted:
30 August 2023
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Material | ρ (g/cm3) | Cp (J/g/K) | Tc (W/mK) |
---|---|---|---|
Carbon fiber, CF | 1.6 | 0.676 | 900 |
Graphite fiber, GF | 2.2 | 0.71 | 100a (38b) |
Aluminum | 2.7 | 0.895 | 237 |
Sizing compound with structure | Carbon fiber | Performance enhancement of CFRP | Reference |
---|---|---|---|
Maleic anhydride grafted poly (vinylidene fluoride), MPVDF, aqueous sizing agent | T300, 3K | 42 % enhancement in ILSS | [5] |
Fe3O4/rGO-modified polyimide aqueous sizing agent coated on the surface of CF’s under an applied magnetic field | BHM3, 3K | 159 % enhancement in ILSS. The enhancement was attributed to reduced agglomeration of graphene nano sheets by the orientation and uniform dispersion of Fe3O4 on graphene surface under applied magnetic field. | [9] |
COOH-CNT modified sizing agent | JH-T800 | 10, 27 and 59 % enhancement in IFSS, ILSS and flexural strength compared to commercial CF-reinforced epoxy composites. | [18] |
Emulsion type thermotolerant sizing agent (a resin synthesized by dodecyl amine and tetraglycidyl diaminodiphenyl-methane) | T700SC, 12K | 29.16 % enhancement in ILSS | [22] |
Emulsion type sizing agent prepared with modified poly (acrylonitrile-butadiene-styrene) | T700SC, 12K | 26.6 % enhancement in ILSS | [23] |
Modified polyacrylate emulsion | PAN based carbon fibers | 14.2 % enhancement in ILSS | [24] |
Nano-SiO2 modified epoxy emulsion (AG-80) sizing agent | PAN based carbon fibers | 14 % enhancement in ILSS | [25] |
Polyimide sizing performed by coating CFs with polyamic acid followed by thermal imidization; | Carbon fibers | Carbon atoms bonded to nitrogen and oxygen increased by 9.72 %; ILSS, axial compression strength and axial compression modulus of composite (with polyphenylene sulfide matrix) increased by 26.39, 26.02 and 19.64 % respectively. | [26] |
Sizing composition with MWCNT dispersion(0.5 %) | Carbon fibers | Tensile strength increased by 70.8 %; Flexural strength and ILSS, increased by 42.8 and 72.9 % | [27] |
Polyurethane and nano SiO2 hybrid sizing; Nano SiO2 grafted with 3-glycidoxy propyl trimethoxy silane (GPTMS) coupling agent followed by dispersion in PU solution | PAN based CFs; SYT49S (12 K) from Zhong Fushen Ying Carbon fiber limited Liability company (China) | 40 % increase in the transverse fibers bundle strength | [28] |
Amine functionalized CNT modified vinyl resin (M720); main polymer content in the sizing agent is 1 % | Unsized CF (12k, 7 μm diameter) Guangwei co., China | Polar functional groups, wettability, and surface roughness enhanced; ILSS and impact toughness of modified CF/unsaturated polyester (UP) composite enhanced by 32.3 and 55.2 % | [29] |
N-(4’4-diamino diphenyl methane)-2-hydroxy propyl methacrylate (DMHM) | PAN based CFs; T700 SC CF (12k), provided by Toray company, Japan | IFSS and ILSS of sized CF vinyl ester resin (SCF/VE) enhanced by 96.56 and 66.07 % | [30] |
Acrylamide functionalized epoxy (E44) sizing agent | PAN based CFs; T700 SC CF (12k), provided by Toray company, Japan | IFSS and ILSS of the modified CFs vinyl ester resin enhanced by 86.96 and 55.61 % | [31] |
Amine functionalized hyper branched polyurethane | PAN based 6000 filaments per tow (6k) provided by Toray company (T-300 textile industry, Japan); tensile strength, 3194 MPa; density, 1.77 g/cc; diameter, 7.8 μm;CF surface was electrooxidised with conc. HNO3 to generate COOH functionality to facilitate grafting with the sizing agent | ILSS enhancement in the epoxy composite was attributed to the improvement of fiber-matrix interface through chemical interaction and mechanical locking | [32] |
Novolac resin as sizing compound for the surface modification of CF; sizing was done in conventional process by immersing fiber tows in a novolac resin solution | PAN based CFs (3 k) provided by continuous polyacrylonitrile based CFs; diameter, 7.1 μmTensile modulus, 211 GPa; tensile strength,, 4.05 GPa | ILSS and impact strength enhanced by 22.5 and 56.8 % | [33] |
CNT modified epoxy sizing agent; sizing composition comprise of CNTs (0.75 wt.%), epoxy resin (E51), tweet-80, and span-60; stability of sizing emulsion enhanced by the presence of CNT in the sizing composition sedimentation is prevented by the addition of CNT to sizing composition; | PAN based carbon fibers, MT300, 3 K | Surface oxygen functional groups enhanced by 45.96 %; surface roughness increased by 73.1 %; contact angle reduced by 11.9 %; IFSS of the composite (bisphenol A epoxy resin matrix) enhanced by 14.7 % | [34] |
Carbon fibers | Chemical method | Functionality improvement | Reference |
---|---|---|---|
CFs were obtained from Toray industries (diameter, 7 μm; tensile strength, 3500 MPa) | Salicylaldehyde (SLDH) was grafted chemically through 3-aminopropyltriethoxyilane (3-APS) bridges onto the surface of CFs | Contact angle with water decreased from 78.5 to 52.1° and the surface energy increased from 35.9 to 55.0 mNm-1; IFSS of the composite (CF-g-SLDH and methyl phenyl silicone resin, MPSR) was enhanced by 48.66 %; Hydrothermal aging resistance was enhanced by 18.5 %; | [45] |
Carbon fiber (no further details available) | Deposition of hydrophobic (n-hexyl amine) layer on CF surface followed by a coating of outer catalyst layer (isolated single atomic sites of cobalt/hallow N-doped carbon spheres) | Modified CF used in the fabrication of microelectrode for sensing oxygen content in brain; four electron reduction of oxygen is achieved; H2O2 formation pathway suppressed preventing cell toxicity | [46] |
Carbon fiber (PAN, asphalt, rayon, graphite) | Polymerization modification | Wettability of CFs with resin improved; physical and chemical interactions between CFs and resins improved | [47] |
T700 12 K; unidirectional; areal density, 200 gm-2; produced by Toray industrial Co. Ltd., Japan | Aqueous solution coating of CFs; polyelectrolyte complexes (PEC) were formed by the reaction between oppositely charged PEI (polyethylene imine) and APP (ammonium polyphosphate) through an ion exchange reaction by soaking the CFs in the PEC at room temperature; | Phosphorous containing PEC coating on CFs (PEC@CF) imparted fire retardancy property to the carbon fiber reinforced epoxy composite; properties of CFRP enhanced as follows:Limiting oxygen index enhanced by 43 %; reduction in the peak heat release rate, 47 %; mechanical properties and glass transition temperature were enhanced; UL-94 V-0 rating achieved for the composite; | [48] |
Carbon fibers (further details are not accessible) | Amine functionalized CFs were further grafted with polyhedral oligomeric silsesquioxane (POSS) species on the surface of CFs; uniform continuous layer of siloxane oligomers formed on CF surface; | ILSS and oxygen erosion resistance of interface of CF-epoxy resin composite improved; material suitable for environment in low-earth orbit for space exploration vehicles; | [49] |
Long PAN based CFs (3 x 103 single filaments per tow); diameter, 6-7 μm; density, 1.76 gcm3; tensile strength, 3500 MPa; obtained from Toray Industries, Inc Tokyo, Japan | Cardanol molecules were granted onto CF surface by in situ polymerization; Initially, hydroxyl groups were formed on CF surface by treating CFs (suspended on a glass frame) with isopentyl nitrite and 4-amino phenol; polar hydroxyl groups served as grafting sites to adhere Cardanol by in situ polymerization of hexachlorocyclotriphosphazene (HCCP) and cardanol; | Wettability and surface energy enhanced by cardanol functionalization; Water contact angle decreased from 78.5 to 66.82 °C; surface energy increased from 35.86 to 47.53 mN.m-1; ILSS of CF-cardanol-UPR (unsaturated polyester resin) composite increased by 41.35 %; | [50] |
Carbon fibers (PAN based; petroleum pitch based and coal pitch based) | Coating organic layer followed by oxidation;soaking CFs in organic solution (phenolic resin slurry or aliphatic hydrocarbon) followed by drying and low temperature heat treatment (180-220 °C); further, the organic layer was oxidized to form surface oxygen functionality in the presence of oxidizing gas (chlorine gas or SO2) carried by inert carrier gas (He or Ar) | Though not disclosed organic layer coating followed by oxidative treatment might have resulted in the formation of oxygen rich surface functional groups; high bonding strength achieved on CF-polyamide 66 thermoplastic composite. | [51] |
Carbon nanofibers prepared from polypropylene (PP) by melt force spinning technology | CN-groups are formed on CF surface by grafting acrylonitrile and methacrylic acid monomers; cyano groups were converted to amidoxime groups by treatment with hydroxyl amine solution followed by treatment with alkali for enhancing the sorption capacity of amidoxime group to form complex with metal ions. | Amidoxime functionalized CFs used as adsorbent for U (VI) (83.24 mg/g in 60 min at pH = 4) from simulated sea water. | [52] |
PAN fibers, provided by Jilin chemical industrial company, Ltd., China | Chemical treatment with hydroxylamine hydrochloride and mono ethanolamine followed by thermal oxidation in air; amidoxime groups formed on CF surface as a result of chemical treatment followed by oxidation. | Thermal stability, flame retardant and mechanical properties were enhanced; | [53] |
Carbon fibers (CFs), supplied by Sigma Aldrich; diameters, 100 μmLength, 20-200 μm | CFs were dispersed by ultrasonic treatment in the aqueous solution of Triton X-100; the well dispersed CFs were surface functionalized (O, N, S) by oxidative treatment with H2SO4 and HNO3 (3:1) at 80 °C for 90 min; | Amount of oxygen functional groups on CNF surface increased by Triton X-100 mediated acid oxidation | [54] |
PAN based carbon fibers;Diameter, 7 μm;Fibers surface treated with epoxy resin based sizing agent (1.3 %); Supplied from Toho Tenax Europe GmbH, Japan, in the form of carbon fiber tape; | Surface oxidation by plasma treatment; prior to Ar plasma treatment the sizing was removed by treatment with acetone at 50 °C for 18 h; Ar plasma treatment was done by cold radio frequency (RT) plasma multi-jet at atmospheric pressure; | Wettability measured by glycerol contact angle decreased from 90-35°; oxygen functionalities (alcohol, ether, carboxyl, ester groups) increased; ILSS increased from 20.8 to 31 MPa | [55] |
Carbon fibers based on 3K-1200-200 twill weave fabrics; | Thermal oxidation (300-500 °C for 30 min in air atmosphere) | Oxygen functionalities (hydroxyl, ethereal, carbonyl, carboxyl and epoxy) were formed on the CF surface; ILSS of CF-Poly sulfone composites increased from 42.8 to 62.9 MPa; formation of chemical bonds between CF and polysulfone matrix lead to enhancement in ILSS; | [56] |
T300 PAN based carbon fiber plain cloth from Toray, Japan | CF-epoxy composite was treated with conc. H2SO4 (97 wt.%) followed by CaCl2 (1 M). The composite was surface functionalized with SO3H and Ca2+ species; | Biocompatibility of CF-epoxy composite enhanced by the presence of –SO3H and Ca2+ species on the surface ; uniform dense coating of apatite was formed on the composite when soaked in simulated body fluid (SBF) indicating the application in orthopedic and dental implants | [57] |
Carbon fibers, PAN based | Oximation (treatment with Na2CO3 and hydroxyl amine hydrochloride lead to formation of amidoxime groups) followed by alkaline hydrolysis (lead to partial hydrolysis of amidoxime groups to carboxylate groups); oxygen content increased from 2.71 to 35.92 % upon modification; | Radioactive waste mitigation; Adsorption of U (VI) from radioactive waste, 163 mg/g; efficient and economic removal of U (VI) from radioactive waste; U (VI) coordinates with amidoxime (=N-OH/=N-O-), -NH2/-NH-, and carboxyl groups through a penta-coordination complexation; | [58] |
Carbon fibers, T700SC, 12k | Desized CFs were pulled through PEI (polyetherimide) sizing agent solution in N-methyl-pyrrolidone (NMP) followed by in situ functionalization with zeolitic imidazolate frame work-67 (ZIF-67) by immersing PEI sized CF tows in 2 – methylimidazole followed by reaction with Co(NO3)2 6 H2O (24 h, RT); PEI sizing layer controls the relative amount of ZIF-67 crystals adhered to the CF surface; | 40.5 % enhancement in IFSS of modified CF/PEEK | [59] |
Carbon fibers, 3 x 103 single filaments per tow; diameter, 7 μm; density 1.76 g/cm3; tensile strength, 3500 MPa; tensile modulus, 230 GPa; provided by Toray industries, Inc., | Hyper branched polysiloxane grafting by sol-gel polymerization; | Water contact angle decreased from 78.5 to 52.1°; surface energy increased from 35.9 to 55.5 mNm-1; ILSS and impact strength of CF-MPSR composite increased from 56.02 and 33.78 % respectively; | [60] |
Carbon fibers (no further information accessible) | Polyurethane coated CFs used as reinforcing material for polyamide46/polyphenylene oxide (PA46/PPO) | Mechanical, tribological and heat resistance properties enhanced; volumetric wear resistance decreased by 95 %; tensile strength increased from 82 to 282 MPa. | [61] |
Carbon fibers (T800SC), PAN based; used in the form of carbon fabric provided by Nanjing Tianniao corporation, China | Carbon coated CFs by hydrothermal process (180 °C) using glucose as carbon precursor; | BET specific surface area increased from 6 to 44 m2/g; specific capacitance enhanced from 15 to 106 F/g; IFSS increased from 39.8 to 51.3 MPa; applicable for wearable (flexible textile) electronic devices | [62] |
Carbon fibers in the form of carbon fabric (density, 1.55 g/cc), provided by Torayca, Japan | Air plasma (6 kW processing power) oxidation and etching using atmospheric pressure plasma jet (APPJ) system; polar functional groups formed on the surface; active species (OH, N2, O) are generated during plasma irradiation; | Water contact angle decreased by 49.7 %; surface free energy increased by 41.3 %; Sheer strength of modified CF-reinforced plywood increased by 50 %; | [63] |
Carbon fibers, T700 based non-crimp fabric (NCF UD, 400 gsm) | Hydrophobic (C8, unsaturated fluorinated monomer) coating on CF surface by inert gas plasma treatment; | 71 % growth of loss factor; CFRP (epoxy matrix, biresin CR80) material with reduced sound emission due to reduction of the fiber-matrix bonding via hydrophobic and non-polar treatment; | [64] |
Ultrahigh molecular weight polyethylene (UHMWPE) fibers; diameter, 40 μm; provided by Dacheng Advanced Material Co., Ltd., China | Chromic acid pretreatment; bamboo like polyethylene crystals were formed on the surface of pretreated UHMWPE using solution crystallization; pretreated UHMWPE were added to the p-xylene solution of polyethylene (110 °C for 10 min); the mixture cooled to 96 °C and allowed to crystallize for 3 h | Strength and toughness of modified UHMWPE epoxy composites improved simultaneously; tensile modulus increased from 57.8 to 73.5 GPa; bending modulus increased from 45.4 %; ILSS enhanced by 71.9 % ; | [65] |
Carbon fibers prepared from oxidized coal, polyacrylonitrile and pitch | Depositing pitch on the modified carbon surface and subsequent carbonization; | Super hydrophobic CFs with a water contact angle of 159.5°; used for gravity driven oil/water separation ; 98 % separation efficiency; flux, 3600 L/m2 h; | [66] |
Polyimide (PI) organic carbon fibers | Surface modification with silane coupling agent (KH-550) is better than SiO2 sol-gel or ozone treatment; formation of Si-O-Si groups at the interface of PI/epoxy composite; | Polar surface functionality (Si-O-Si) increased; surface roughness increased by an order of magnitude; water contact angle decreased from 111.1 to 82.3°; IFSS and ILSS of PI/Epoxy composites enhanced by 15.6 and 18.2 % respectively. | [67] |
Rayon carbon fibers | Oxidation and grafting modification to generate enriched oxygen and nitrogen groups; | Improved electric double layer performance; lower capacitative impedance; high sensitivity marine electric field sensor; | [68] |
Carbon fibers | Inductively coupled RF plasma (ICP) treatment for surface oxidation; carboxyl and hydroxyl groups are formed; | Interfacial property of composites with bismaleimide (BMI) resin enhanced; surface roughness, surface free energy, and wettability improved | [69] |
Carbon fibers (length, 2 mm) provided by Nanjing WeiDa composite Material Co Ltd., Nanjing, China | Conc. HNO3 treatment (60 °C, 3 h) | Flexural strength and modulus of CF reinforced ultrahigh molecular weight polyethylene (UHMPE) increased to as high as 157 Ma and 9.82 GPa respectively; | [70] |
Carbon fibers from Good fellow, Huntingdon, England | Polymer (PEI) surface coating; | Limit of detection of 3-methoxy tyramine, 3 MT; 3, 4-dihydroxyphenyl acetic acid, DOPAC, 58.2 nM (enhanced by 80 %) | [71] |
Carbon fibers (T700-12K-50C, average diameter, 7 μm) Toray Industries Inc., | Copolymerization of dopamine and poly (amidoamine); | IFSS, ILSS and impact strength increased by 78.57, 62.39 and 75.12 % respectively | [72] |
Carbon fibers (PAN based, T 300, 3K, diameter 7 μm; density, 1.76 gcm-3, tensile strength, 3.53 GPa) | Layer by layer (LbL) selfassembly to deposit graphene oxide/silica (GO/SiO2) multilayers on CF surface based on electrostatic interactions; | IFSS, ILSS and flexural strength increased by 86.1, 89.3 and 30.4 % | [73] |
Carbon fibers supplied by Jilin carbon co. Ltd., ; coated with epoxy resin; density, 1.76 gcm-3; diameter, 6.44 μm; | Desizing, oxidation with AgNO3 and K2S2O8 (to form CF-COOH); treatment with LiAlH4 (to produce CF-OH); grafting with γ-amino propyl triethoxy silane (γ- APS) as coupling agent | IFSS, flexural strength, and flexural modulus enhanced by 52.9, 29.1 and 42.6 % | [74] |
Carbon fiber tow (3K, T300, Toray co, Ltd., Japan) | Uniform TiC/Ti2AlC coating by in situ reaction with molten salts; subsequent pyrolytic carbon layer deposition through pyrolysis of phenolic resin; desizing followed by coating with TiC/Ti2AlC with Ti and Al powders as respective precursors; | High resistance to temperature, oxidation and corrosion; application in high performance CF/SiC composites for aerospace, and nuclear industries; | [75] |
CF fabric (3K-T300-plain) supplied by Toray industries, Inc., Tokyo, Japan | Aminated polyether ether ketone (PEEK-NH2) grafted to CF surface; | ILSS improved by 33.4 %;Modified CF is compatible with PEEK matrix for CFRP formation | [76] |
Carbon fiber, PAN based with epoxy/polyurethane sizing (H TS 40 FB, Teijin Carbon Europe GmbH,, Wuppertal, Germany) | Oxyfluorination (F2/N2 mixture with 10:90 vol %) at room temperature for 180 S | Desized; surface bound fluorine content and oxygen functionality enhanced; strength of fibers increased by 10 % | [77] |
Carbon fiber T700SC-12000-50C; diameter, 7 μm; tensile strength, 4.9 GPa; with 1 % sizing on the surface | Amine functionalization of CF surface using 4-(aminomethyl benzene derivative; grafting tosylated lignin derivative to arylamine functionalized CF | IFSS increased by 27 and 65 % with epoxy and cellulose propionate matrices | [78] |
Carbon fibers | Grafting of aryl sulfate with aryl amine pendant groups; Exposure of fibers to an atmosphere of sulfuryl fluoride (SO2F2) gas lead to fluoro sulfate functionality ; exchange with aryl silyl ether to form pendant aryl amino group | IFSS improved by 130 % in the epoxy resin composite | [79] |
Carbon fibers, PAN based; diameter, 7 μm; density, 1.76 gcm-3 ; provided by Sino steel Jilin carbon co, China | Desizing; oxidation with AgNO3 and K2S2O8; CF-COOH is grafted with polyethylene imine in supercritical methanol | Polarity, wetness, roughness of modified CFs enhanced;Water contact angle decreased from 85.68 to 36.54°; surface energy increased from 31.3 to 66.62 mNm-1IFSS of the modified CF epoxy composite increased by 40.60 % | [80] |
Carbon fibers, PAN based; based; diameter, 7 μm; density, 1.76 gcm-3 ; provided by Sino steel Jilin carbon co, China | Polyether amines; covalently grafted and coated onto oxidized CF surface (CF-COOH) to form CF-g-PEA | Polarity, wettability, roughness, and IFSS increased | [81] |
Carbon fibers | In situ formation and deposition of graphitic carbon nitride (g-C3N4) on CF surface | Polar functional groups, roughness, wettability enhanced; water contact angle decreased from 75.37 to 46.37°; surface energy increased by 65.6 %; ILSS, IFSS, tensile strength, absorbed energy of impact enhanced by 16.4, 43.2, 16.9 and 30.3 % | [82] |
Carbon fibers, T300; diameter 7 μm provided by Toray, Japan | Evaporation induced surface modification; deposition of polyether imide (PEI) nanoparticles on the CF surface; PEI, optimal conc. 0.2 %; | IFSS enhanced by 44.02 % | [83] |
SIGRA FIL® C30 T050 supplied by SGL carbon GmbH | Low pressure ammonia plasma treatment | Nitrogen content of the fibers enhanced; wettability and surface energy are enhanced | [84] |
H TS 340, provided by Toho Lamac Co., Ltd., Tokyo, Japan | Grafting of maleic anhydride followed by deposition of intumescent flame retardant (IFR) | Synergistic activity of maleic anhydride grafting and intumescent flame retardant (P, N and O) on the enhancement of flame retardency and mechanical property | [85] |
Mesophase pitch based CFs without sizing | Microwave oxidative etching of CF surface (dispersed in water) in the presence of micro plasma ; etching of surface GO layer | Oxygen containing functionalities enhanced; nitrogen heterocyclic rings of the bulk of CFs were exposed; IFSS of modified CF with epoxy resin composite enhanced | [86] |
T300 grade CFs (3K) produced by the institute of coal, chemistry, Chinese Academy of Sciences | Grafting of acrylamide on CF surface | IFSS and ILSS of polyimide composites enhanced by 86.96 and 55.61 % | [87] |
CF (3K; diameter, 7 μm) provided by Toray industries | Hydroxyl groups were formed on CF surface (by aryl diazonium reaction) followed by chemical grafting with octamaleamic acid-polyhedral oligomeric silsequioxanes (OMA-POSS) | Polarity and roughness increased with grafting density; IFSS and ILSS enhanced in the silicon composites by 65.87 and 70.89 % | [88] |
PAN based CFs from Jilin Jiyanhigh technology fiber, Co Ltd., Jilin, China | Methyl acrylate grafting to generate carboxyl functionality | Shear and tensile strength of modified CF’s enhanced by 90.3 and 78.7 %; wear rate decreased by 52.7 % in the phenolic composite of methyl acrylate grafted CF’s | [89] |
Carbon fibers (length, 10 mm; diameter, 7 μm) | Desized by boiling in propan-2-ol; chemical prefunctionalization by treatment with either H2O2 or aqua regia followed by treatment with 1 M CaCl2 at 80 °C for 24 h; deposition of calcium phosphate crystals on CF surface; | Mechanical properties (strength and work of fracture) of calcium phosphate cement (CPC) were enhanced by injectable and load bearing substitutes; strength increased by a factor of 4 and work of fracture increased by 2 orders of magnitude; | [90] |
UHMWPE (ultrahigh molecular weight polyethylene) fibers (diameter, 20 μm; molecular weight, 4.5 million) | Ozone treatment (generate oxygen functionality) followed by UV irradiation polymerization grafting of glycidyl methacrylate (GMA) onto UHMWPE fiber (ultrahigh molecular weight polyethylene) | Interfacial adhesion force of UHMWPE fibers with rubber matrix enhanced by 79 % | [91] |
Carbon fibers | Desizing CFs were coated with a layer of polydopamine with di-coating method; | Bending strength and modulus increased by 71.3 and 36.9 % | [92] |
Carbon fibers | Hydrothermal treatment with glucose followed by carbonization to form amorphous carbon layer on CF surface | ILSS of CF/polyimide composite enhanced; IFSS of CF/polyether ether ketone is enhanced; oxygen functionality (C-O, C=O) generated | [93] |
T700SC-12000-60E CFs, epoxy sized, provided by Toray carbon Europe | Grafting of hydroxyethyl methacrylate on CF surface by free radical polymerization of vinylic monomers | Tensile strength and ILSS increased by 10 and 20 % | [94] |
CF, T700 SC 12K, Toray, Japan | Co deposition of polyethyleneiminie/polydopamine (PEI/PDA) on CF surface by oxidation co-polymerization | Surface energy enhanced by 70.5 %; 45.7 % increase in apparent activation energy (290 kJ/mol) which is a reflection of strong interaction between PEI/PDA layer and matrix; | [95] |
Carbon fibers | Mechano chemical modification by simple rubbing | Surface modification facilitated surface oxidation; oxygen functionalities (hydroxyl, alkoxide, carbonyl and carboxyl groups were generated); modification confined to first few atomic layers | [96] |
Carbon fibers, JT-400A-3K, diameter, 6.8 μm; linear density, 0.175±6 g/m; density, 1.76 g/cm3; provided by Jilin Shen Zhou Carbon fiber Co Ltd., | Chemical grafting of hyper branched polyglycerol (HPG) via anionic ring-opening polymerization | IFSS and ILSS the epoxy composite enhanced by 90.69 and 49.83 % | [97] |
Carbon fibers (5631 12K) provided by Toho Tenax Co Ltd., Tokyo, Japan | Sol-gel coating prepared by the hydrolysis and condensation reactions between tetraethyl ortho silicate (TEOS) and one of the four organic compounds namely, (3-amino propyl) trimethoxy silane, (3-mercaptopropyl) trimethoxy silane, 2-(3, 4-epoxy cyclo hexyl) ethyl trimethyoxy silane and methyl trimethoxy silane, depending on the kind of functionality required | Si-O-Si, epoxy, SH, CH3 functionalities were generated on CF surface; Stiffening and clumping of fibers is prevented by functionalization; oxide network structure with organic functional groups is generated; surface enhancement is maximum in coatings leading to the formation of epoxy functional groups | [98] |
Carbon fibers (T700SC-12000-50C, 12k); tensile strength, 4.9 GPa; diameter, 7 μm; density, 1.8 gcm-3 | Surface functionalization using poly(oxopropylene) diamines (D-400) as coupling and curing agents | Polarity, wettability and surface roughness enhanced; tensile strength increased by 8.2 %; IFSS of modified CF/epoxy composite enhanced by 79.1 % | [99] |
PAN based CFs (CH-CF 1k), provided by Shanghai Chem Fiber Technology Co, Ltd, ChinaSingle filaments per two, 12000; tensile strength, 4.9 GPa; tensile modulus, 230 GPa; diameter, 7 μm; elongation, 2.1 % | Supersonic atmospheric plasma spraying; the power composition used for spraying is 30-50 wt.% Si, 30-40 % KMnO4, 10-20 wt. % C and 4-8 wt.% TiO2; slurry of the spray powder prepared in distilled water with polymeric binder | ILSS of the polypropylene/polystyrene (blends) composites with modified CFs enhanced; water contact angle of the composite enhanced by 50 %; O/C ratio enhanced by 67.9 % | [100] |
Carbon fibers produced by Toho Tenax Co, Ltd., USA | Hydrogen plasma treatment, via plasma enriched chemical vapour deposition (working temperature, 500 °C; pressure 360 mTorr); | Density of functional groups increased; tensile properties enhanced both at room temperature and high temperature (150 °C); | [102] |
Carbon fiber rovers (bundles) | Coating thin layers (2-30 nm) of polymers, namely, poly(acrylic acid) and poly(hydroxyl ethyl methacrylate) using electron spray-ionization (ESI); | Adhesion between CF and polymer matrix (epoxy resin) enhanced; IFSS enhanced by 170-285 % | [103] |
PAN based chopped carbon fibers provided by Hangzhou Gaoke composite Co Ltd., | Oxidation with conc. HNO3 followed by thermal treatment of 400 °C for 2 h; | Oxygen functionality generated (C-O; O-C=O); tensile modulus, flexural strength, flexural modulus of composites (nylon 12, PA12, matrix) enhanced by 11, 11, and 5 % | [104] |
Carbon fibers (T700-12000-50C) from Toray industries | Oxidation of CFs by treatment with HNO3 at 80 °C for 4 h followed by depositing nanoporous Zr based metal organic frame works (UiO-66-NH2) on CF surface; | Surface energy and tensile strength enhanced by 102 and 11.6 % respectively; ILSS enhanced by 50.2 % | [105] |
PAN based CFs provided by Sino steel Jilin carbon Co, China | Step wise growth of melamine-based dendrimers | Surface roughness, and wettability enhanced; IFSS and impact strength of the epoxy based composite enhanced by 61.8 and 39.9 % | [106] |
Micrometer sized magnetic carbon fiber (MSMCF) | Coating polydopamine/polyethyleneimine complex on micrometer sized magnetic carbon fiber (MSMCF) | Sorbent for extracorporeal blood-cleansing in hemoperfusion | [107] |
Carbon fibers | Grafting poly (glycidyl methacrylate) chains onto CF surface by RAFT polymerization | Compression strength, tensile strength, flexural strength and ILSS of epoxy composite enhanced by 63.1m 37.9, 55.6 and 122.5 % respectively | [108] |
Tenax® HTS 45 12K 800 tex CFs provided by Toho Tenax | Oxidation with conc HNO3 (70 °C, 90 min); co oxide and Fe2CoO4 were deposited on CF; | Flexural modulus and flexural strength enhanced by 16 and 62 % respectively | [109] |
JT-400A-3K, diameter, 6.8 μm; linear density, 0.175±6 g/m; density, 1.76 g.cm3; provided by Jilin Shen Zhou carbon fiber co., | Chemical grafting of linear amine terminated poly (amido amine), PAMAM, dendrimers | ILSS enhanced by 53.13 % in the modified CF epoxy composite | [110] |
JT-400A-3K, provided by Jilin Shen Zhou carbon fiber co., | Grafting of polyhedral oligomeric silsesquioxane (44) through poly (amido amine) PAMAM, coupling agent to generate CF-PAMAM-POSS | Surface energy and wettability enhanced; ILSS and IFSS of composites (epoxy matrix) increased by 48 and 89 % | [111] |
PAN based T800 unsized CF’s | Doping with para-amino benzoic acid (PABA) | cytotoxicity minimized; compressive strength enhanced by 27.4 % | [112] |
Pitch based carbon fibers (XN-50®, Nippon graphite fiber Co.,); strength, 3.9 GPa; modulus, 520 GPa | Coating of ester functionalized phenoxy resin based material on CF surface; | ILSS enhanced by 20 % in the composites with polyamide 6 (PA 6) matrix | [113] |
PAN based CFs provided by Toray, Japan | Treatment with silicone peroxide [tris(tert-butyldioxy)-vinyl-silane (VTPS)] Si-CH=CH2 groups generated that acted as covalent bonding bridges between CF and resin matrix (polydimethyl siloxanes, PDMS) | Tensile strength and tear strength enhanced by 52.3 and 340 % | [114] |
Carbon fibers | Oxidative treatment with conc. H2SO4 and HNO3 in the presence of KMnO4 for 16 h; modified CF was woven into a fabric and cut into a certain width of base band for application as ribbon for printer (printeronix p7010 and p7003H) | Improved life time of the printer ribbon (50 million/number of characters); CF based materials fulfil the nylon 66 ultra-high ribbon requirements | [115] |
High strength PAN based CF (T1000 GB; Toray industries Inc.) High-modulus pitch based carbon fibers ( K 13 D; Mitsubishi plastics Inc.,) | Amine functionalized CFs obtained by treatment with different agents, namely, ethylene diamine; 4, 4 diaminodiphenyl sulfone, and p-amino benzoic acid (PAB); | N/C ratio increased ; IFSS of the composite (epoxy matrix) enhanced | [116] |
T700S, average diameter, 7 μm; provided by Toray industries, Inc., Japan | Coating of amine capped poly(cyclotriphosphazene-co-4, 4’-oxydianiline) through in-situ polymerization under mild reaction conditions | Tensile strength increased by 10 % by the healing of surface defects by the formation of poly phosphazene sheath; IFSS increased by 70.5 % | [117] |
Carbon fibers | Plasma treatment; environmentally safe method | IFSS of the micro composite (poly phenylene sulfide, PPS matrix) increased by 17 % | [118] |
Carbon fibers (3K), provided by Toray industries, diameter 7 μm; density, 1.76 gcm-3 | Grafting of octaglycidyl polyhedral oligomeric silsesquioxane (gly-POSS) and tetraethylene peptamine (TEPA) were grafted to CF surface in succession | Fiber polarity, wettability and surface energy were enhanced; ILSS and impact toughness of composite (with methyl phenyl silicone, MPSR resin matrix) enhanced by 56.6 and 34.9 % | [119] |
Carbon fibers in the form of reinforcement cloth bought from Shanghai Yingjia Special fiber Material Co Ltd., Shanghai, China | Oxidation with conc. HNO3 for 3 h; Candida tropicalis immobilized on CF surface for Xylitol fermentation | Hydrophilicity generated; immobilization efficiency of Candida tropicalis enhanced (0.98 g/g modified CF); xylitol yield (70.13 %) and productivity (1.22 gL-1h-1) were enhanced | [120] |
PAN derived CFs, UKN-M-12K provided by Argon Ltd, Russia;Specific weight, 1.75 g/cc; diameter , 7 μm; elastic modulus, 220 GPa; tensile strength, 3.0 GPa | Coating of Al2O3 (3.3 wt. %) (by soaking in Al(OH)3 followed by annealing at 800 °C) as protective layer followed by grafting with CNT | IFSS of the composite (with polyurethane matrix) enhanced by 144 %; composite stiffness and thermal conductivity enhanced; flexible composites with outstanding delamination resistance | [121] |
PAN based T800 CFs supplied by Petro China Jilin Petrochemical company (Jilin, China) | Controlled chemical oxidation with H3PO4/H2SO4/HNO3; soaking in mixed H3PO4/H2SO4/HNO3 for 1 h at 60 °C; | Anode electrode material for Li ion batteries; presence of H3PO4 in the electrolyte restricted the formation of surface defects during modification; tensile strength of the original CF’s preserved | [122] |
PAN based CFs, T300, with 3000 single filaments per tow; provided by advanced fiber research center, Iran | Oxygen plasma treatment (1 min; 125 W; oxygen flow rate, 1000 1 cm3STP/min); high power and long exposure reduced the tensile strength and ILSS of CFs | ILSS of the composite (epoxy matrix) enhanced by 28 %;reactive functional groups increased; surface roughness enhanced | [123] |
Carbon fibers | Microwave irradiation in ionic liquid [1]-ethyl-3-methyl imidazolium bis (trifluoromethyl sulfonyl) imide] and organic solvent, 1, 2-dichlorobenzene | 28 % enhancement in interfacial adhesion | [124] |
PAN based CFs, T300 B, provided by Toray Co., | Vinyl groups of coupling agent N-(4-amino-phenyl-2-methyl-acrylamide (APMA) were grafted CF surface, APMA-CF | IFSS and the flexural strength of composite (vinyl ester resin matrix) enhanced by 90.53 and 19.4 % respectively | [125] |
Carbon fibers | Electro-chemical method | Functionality improvement | Reference |
---|---|---|---|
Toray T700, 7 μM diameter (polyacrylonitrile based carbon fibers) | Electrochemical oxidation:Carried out in a two-electrode cell (PAN anode and graphite cathode) with H3PO4 (0.5 M) as electrolyte with a current density of 5 A/g for 5 min. | Due to oxidation, the amount of oxygen functional groups, namely, hydroxyl, carbonyl and carboxylate increased; these groups made the carbon fibers hydrophilic; contact angle decreased from 142 to 52° | [126] |
High modulus carbon fiber (HMCF, 6 K), diameter 5.2 μm;Bulk density – 1.846 g/cm3Linear density – 0.238 g/mTensile strength – 4.0 GPaTensile modulus – 410 GPa | HMCF was anodized (oxidized) by electrochemical oxidation in the electrolyte (NH4)2SO4 followed by electrochemical grafting with diethylenetriamine (DETA) by electro chemical grafting; | As a result of the two stage electrochemical oxidation and grafting, oxygen and nitrogen containing surface functional groups were formed on the surface of the highly inert and unreactive HMCF; ILSS of functionalized HMCF/epoxy composites increased by 257 %; | [127] |
Carbon fiber (no further details available) | A ultrasound (40 kHz; ultrasonic bath) assisted anodic oxidation (+2 V) in alkaline medium; sono anodization was performed by immersing electrochemical cell in a ultrasonic clean bath; kinetics of electro-oxidation increased by sonication; | C-O functionality increased at the expense of C-C and C=C; carbon edge defects increased; contact angle decreased from ~115 to ~40°; increase in wettability is attributed to formation of carboxyl and C-OH functionalities; | [128] |
HT40 E13 6K 400 tex provide by TohoTenax®-E (PAN derived CF, epoxy sized diameter, 7 μm; tensile modulus, 238 GPa; tensile strength, 3.9 GPa) | Active screen plasma functionalization; radicals generated in the plasma using gas mixtures of N2-H2-Ar modify the CF surface; the applied voltage was in the range of 300-400 V between the active screen (cathode) and the wall of the furnace (anode); | Structural disorder of modified CFs reduced; surface crystallite size and tensile strength of the modified CFs increased; Flexural strength of the CF-epoxy composite increased by 3.8 % and ILSS increased from 43.7 to 43.9 MPa; | [129] |
HF 100 PAN based carbon fiber (12 K, tensile strength ≥ 3530 Mpa; elastic modulus, 230 GPa; density, 1.789 cm-3; diameter, 7 μm); provided by Jiangsu Hengshen Incorporated Company (Jiangsu, China); obtained by carbonization without surface treatment and sizing; | Anodic oxidation (current density: 0-6 Am-2) with 5 wt.% NaOH followed (electrolyte) followed by rinsing with HCl (0.1 M) | IFSS of CF-epoxy composite is enhanced by 15 % when CFs are treated in NaOH electrolyte followed by HCl treatment | [130] |
Carbon fibers without sizing agent; supplied by Hengshen Co Ltd., Jiangsu, China; diameter, 7 μm; density, 1.78 g/cm3 | Electrophoric deposition (EPD) of graphene oxide (particle size distribution, 0.5-10 μm) on CFs followed by electro polymerization of itaconic acid and p-aminobenzoic acid; For EPD process, | ILSS of CF-epoxy (E51) composite enhanced by 37.6 %; tensile strength of CF monofilament increased from 3.01 to 3.22 GPa; water contact angle decreased from 119.9 to 30.2°; Tg increased by 7.15 °C and storage modulus (E’ at 35 °C) increased by 73.9 % | [131] |
Pure carbon fiber was provided by Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences | Ni coated on CF surface was achieved by electroplating method; NiSO4 6 H2O was the main Ni source; CF is used as cathode placed between two nickel anode plates in the electroplating bath; | Electro thermal conversion efficiency of Ni coated carbon fiber (NCCF) bundles was 32.5 % higher than untreated fiber based composites; The composite material has E heating (de-icing) application in aerospace, wind turbine, civil infrastructure building for cold climatic regions | [132] |
Pristine unsized CF, 12k tow, Carbon Nexus | Electro reductive grafting of aryl diazonium salts followed by in situ polymerization of monomers onto CF surface to impart colour to CF; | Blue CFs with application in smart composites produced; exposure to different solvents varied the colour of CFs from blue through the visible spectrum; tensile strength of treated fibers increased by 12 % ; 300 % enhancement in the fiber to matrix (epoxy) adhesion observed compared to control; | [133] |
Carbon fibers, PAN based with epoxy sizing supplied by Toho Tenax (Tenax® - EHTS40 F13 12 K yarn fineness 800 tex Toho Tenax Europe GmbH Wuppertal, Germany) | Oxygen containing calcium species (calcite) was coated on CF by anode electro oxidation in cement pore solution (3 V, 15 M); | Shear bond strength of CF increased by 37.9 %; compatibility and mechanical properties of modified CF-cement based composites enhanced. | [134] |
Carbon fibers, PAN based, 6000 filaments per tow; prepared in the laboratory | Two stage process of surface modification; electro oxidation (enhanced oxygen functionalities) and grafting of silane coupling agent (KH 550) | IFSS and ILSS of CF/EP composites increased by 73.1 and 61.2 % respectively. | [135] |
HMCF (high modulus carbon fiber), tensile modulus, 410 GPa; tensile strength, 4.0 GPa; diameter, 52 μm, 6 K) obtained by the carbonization of PAN based CF (at 2400 °C) | Multi stage anodization (electron oxidation, with NH4HCO3 followed by (NH4)2SO4; | ILSS increased by 299 % (from 23.3 to 93.1 Mpa) | [136] |
Carbon fibers (unsized and unoxidised); provided by Carbon Nexus at Deakin University, Australia | Electrochemical reduction of nitro aryl diazonium salt to graft amine groups of CF surface followed by depositing perfluoroalkyl chains on CF surface | Hydrophobicity generated; fiber to matrix adhesion increased as high as 216 %; water contact angle increased from 98.4 to 135.5° | [137] |
Carbon fibers (PAN based) HTA 40 E13 3K CF from Toho Tenax Europe GmbH (HTA) | Thermal desizing followed by electrochemical oxidation with NH4HCO3 solution as electrolyte | Interfacial fracture toughness enhanced; surface oxidation of CF improved the siliconization (liquid silicon infiltration) leading to enhancement of mechanical property | [138] |
Continuous carbon fibers (T700 SC-12K), diameter, 7 μm; tensile strength, 4.51 GPa; tensile modulus, 248 GPa | Electro oxidation with 1 M HNO3, at 150 mA, for 1 h | Reactive oxygen and nitrogen functional groups formed (C-O, C=O, C-N, C=N, O=C-O); surface roughness enhanced; interfacial adhesion between modified CFs and high density polyethylene (HDPE) enhanced | [139] |
Carbon fiber fabric | Electrolytic plasma spraying for coating SiO2/SiC on carbon fiber fabric using Na2SiO3. 9H2O as electrolyte; spraying distance (15 mm) is a crucial parameter; | Oxidation resistance temperature increased up to 1000 °C; tensile strength enhanced by 48.77 %; | [140] |
Carbon fiber (5 μm diameter) | Electro deposition of gold thin film on CF surface | Improved performance as microelectrode for the detection of catecholamine and dopamine | [141] |
Carbon fibers (unsized, electrolytically oxidized) provided by carbon Nexus at Deakin University, Australia | Surface grafting through Kolbe decarboxylation reaction; electrochemical oxidative grafting of benzyl groups (-CH2-Ar-CH2-Ar) | IFSS increased by 112 % | [142] |
Ni coated carbon fibers, 12k 50 NiCCF tow, provided by Toho-Tenax | Desizing followed by electro oxidation in NaOH (0.1 M) in the potential range of 1600-1800 mV vs RHE | Oxygen evolution reaction (in the water electrolysis for H2 production) reaction kinetics enhanced from the reduction of charge transfer resistance and modification of Tafel polarization slopes | [143] |
Carbon fibers unsized and electronically oxidized, produced by carbon Nexus at Deakin University, Australia | Reductive electrochemical deposition of diazonium salt to generate pendant amine and carboxylic groups | Composites of CF with amine pendant groups with epoxy matrix showed 172 % enhancement in IFSS | [144] |
Carbon fibers | Electrochemical copolymerization of acrylamide and acrylic acid using cyclic voltammogram in H2SO4 electrolyte | Tensile strength of the composite (with epoxy matrix) enhanced | [145] |
Toray carbon fibers (T-700-12k-60E); strength, 4.9 GPa; modulus, 230 GPa; density, 1.80 g/cm3; diameter, 7 μm; sizing type, 60E, sizing volume, 0.3 vol % | Functionalization with active screen plasma treatment (300 V for 5 min) with a gas mixture of 25 % N2 and 75 % H2; | surface enriched with nitrogen functionality; amine and pyridone type nitrogen were introduced; quinone (C=O) and ester (O-C=O) type oxygen functionalities were formed; wettability increased; water contact angle decreased from 80 to 41° | [146] |
PAN based carbon fibers (T700 SC, 12K tow fibers) provided by Toray industries Inc., | Electrochemical oxidation of CF in H2SO4 electrolyte followed by grafting with 4, 4’-diphenyl methane diisocyante (MDI) | Tensile strength of MDI-CF composites (polyurethane matrix) increased by 99.3 % ; friction loss decreased by 49.09 % | [147] |
Carbon fibers | Coating of polyacrylic acid layer of CF surface by the elctropolymerization of acrylic acid | ILSS of the composite (epoxy matrix) enhanced by 123 % | [148] |
Carbon fibers HTS40, Toho Tenax | Adsorption of poly(methyl) methacrylate (PMMA) particles on the desized CF surface by electrophoresis | IFSS enhanced | [149] |
PAN based CFs; 48k; A-company, Jeonju, Korea | Electrochemical oxidation; electrolyte (ABC) undisclosed | Oxygen (-OH, C=O, COOH) and amine functionalities were introduced; toughness of CFs increased; IFSS of composite (with epoxy matrix) enhanced by 144 %;Surface energy increased from 70.6 to 82.5 mN/m (16.8 %) | [150] |
PAN based CFs | Electrochemical coating using electrolytes; fatty alcohol polyethylene ether ammonium phosphate (O-3PNH-4; 5 % mass fraction) showed best performance | Hydrophilic acidic functional groups formed; surface energy enhanced | [151] |
T700 carbon fibers provided by Toray, Japan | nanofibers of polyaniline (PANI) were grown on modified CF surface by in situ electrochemical polymerization; | Functionalization of CF with nitrogen containing compounds enhanced the electrochemical performance of PANI composite for supercapacitor application; faster charge transfer; smaller internal resistance and improved electro chemical performance | [152] |
CFs based on PAN provided by carbon nexus, Australia | Covalent surface modification; electrochemical grafting of biphenyl groups using diazo benzene precursor | Electric resistance of CFs increased by 250 %; IFSS of epoxy composites enhanced by 19 % | [153] |
Carbon fibers | Immobilization of Prussian blue crystals on CF surface by electrochemical modification | Potential adsorbent for Cs+ over a wide range of pH values (acidic and basic) | [154] |
Carbon fibers | Modification method | Functionality enhancement | Reference |
---|---|---|---|
Carbon fibers from Donghua university (no further details available) | Hydrophilic Fe3O4 NPs were grafted on the surface of CFs using polyol-assisted hydrothermal method (CFs@ Fe3O4); | Presence of hydrophilic Fe3O4 NPs improved interfacial adhesion of CFs; Hydrophobic CFs were converted to hydrophilic magnetic CF, CFs@Fe3O4@SiO-C/Ni; | [156] |
T300, diameter 7 μm, provided by Toray, Tokyo, Japan | Coating nanoparticles of polyetherimide (PEI) on carbon fibers by evaporation induced surface modification; | IFSS enhanced by 20.5, 37.7, 52.7, 49.6, 42.5 and 58.0 % as the thermoplastic resin in the composite is varied from PVC, PC, PA6, PP, PA66 to PEI respectively | [157] |
Carbon fibers (no further details provided) | Desized carbon fibers added to a solution (solvent is atleast one of water, alcohol, acetone, and tetrahydrofuran) of ferrocene derivative Subsequently the ferrocene functionalized CFs were either oxidized or electrooxidized | Though not disclosed, the surface modification of CFs might have formed nanoparticles of Fe3O4 on CF surface making the CFs magnetic and hydrophilic leading to enhancement of their performance in composite materials and catalysis. | [158] |
T300 (average filament diameter 7 μm); 3 K plain weave mat type carbon fibers; tensile strength, ~3500 MPa; supplied by Toray, Japan | Grafting graphene based nanofillers to CF surface by cathodic electrophoretic deposition (EPD) | IFSS and flexural strength of composite (CF-DGABE type epoxy) enhanced by 35 and 26.6 % respectively | [159] |
T700-12 K (bidirectional PAN derived); supplied by Toray | Functionalization with MWCNTs by dip-coating technique | Structural, electrical and thermal properties of the composite (modified CF with epoxy matrix) increased | [160] |
Carbon fibers in the form of carbon cloth (1 K, T300); supplied by Toray Inc., Japan, China | Silicon carbide nanowire functionalized CFs prepared by Si coating followed by thin carbon layer coating and graphitization; | Contact angle decreased by 32°; wear resistance increased by 78 % | [161] |
Carbon fibers (3K, diameter, 7 μm;Tensile modulus, 230 Gpa; tensile strength, 3500 Mpa;provided by Toray industries, Inc., | Halloysite nanotubes (HNTs) were grafted to CF surface through diethylenetriamine-penta acetic acid bridges | Surface polarity, energy and wettability increased; 17.95 % increase in storage modulus; glass transition temperature enhanced by 17 °C in the CF-MPSR (methyl-phenyl silicone resins) composite; water contact angel decreased from 78.5 to 42.76°; surface energy increased from 35.87 to 62.71 mN.m-1; ILSS and IFSS enhanced by 76.52 and 72.73 % | [162] |
Carbon fibers (no further information accessible) | Coating oxidized graphite NPs on CF surface with ultrasonically assisted direct current electrophoretic deposition (at 50 V for 5 min) | Transverse fiber bundle test strength enhanced by 113 %; aspect ratio of CF surface enhanced upon modification with oxidized graphite NPs. | [163] |
Carbon fibers,Diameter, 7 μm;Provided by Toray industries, Tokyo, Japan. | Functionalization with SiO2 NPs through the hydrolysis of tetra ethyl ortho silicate (TEOS) onto poly dopamine coated CFs; | ILSS and IFSS of CF/PDA/SiO2-silicone composites enhanced by 57.28 and 41.84 % | [164] |
Carbon fibers (no further information accessible) | Functionalization with nanoparticles of Ti, Al by reacting CF with nano powers of Titanium, Aluminum in the presence of KCl, NaCl and phenolic resin and subjecting the treated CF to carbonization at 900 °C for 60 min followed by treatment of the carbon film coated Ti, Al functionalized CFs with LiF and HCl. | ILSS of the composite increased by 20-30 % ; thermal stability of the resulting fiber is claimed to be enhanced upto 900 °C; probably, TiC and AlC NPs might have formed on the CF surface imparting thermal stability to the material | [165] |
Carbon fibers supplied as carbon fiber cloth (CFC, PAN based) by Avantor performance materials, Poland, S. A., | Ag NPs were deposited on TiO2 by wet impregnation and NaBH4 reduction; Ag NP coated TiO2 was supported on carbon fiber cloth (CFC) by spraying and drying method; Ag/TiO2-CFC | Photo catalyst for the partial oxidation of NO to N2O; NO2 formation hindered by Ag NPs; NO removal rate, 95 %;Possibility of N2O reduction to N2 by modifying Titania | [166] |
Carbon fiber bundles (24 K, pristine, unsized) supplied by Carbon Nexus, Waurn Ponds, Australia | Deposition of Fe3O4 (magnetite NPs) using ammonium iron (II) sulphate precursor; thermal treatment in N2 at 1000 °C | IFSS improved by 84.3 %; surface energy enhanced by 5.5 % ; ILSS enhanced by 25.9 % | [167] |
3 K plain weave mat carbon fiber (T 300), filament diameter, 7 μm | Electrophoretic deposition (EPO) of graphene based nano fillers (GBN), graphene, graphene oxide, graphene hydroxyl, graphene carboxyl; | Graphene-COOH modified CF should highest enhancement in flexural strength (9.6 %) and inter laminar shear strength (22.9 %) | [168] |
Carbon fiber (diameter, 7 μm, length, 0.1-1 mm) provided by Toray, Japan | Spark plasma sintering for coating SiC; | Improvement in oxidation resistance; temperature (on set) of oxidation increased by 140 °C; (usually untreated CFs gets oxidized rapidly at 500 °C) | [169] |
T300-3K, 7 μM (from Toray Industries, Inc, Tokyo, Japan) | Uniform layer of SiO2 nanoparticles was coated on the surface of CFs using a polydopamine (PDA) resulting in a nanohybrid coating (PDA/SiO2). | Surface energy of CF was enhanced by 42.5 % due to nano hybrid layer coating. Likewise, water contact angle decreased from 78.5 to 41.89°; ILSS of the composite, CF-PDA/SiO2-methyl phenyl silicone resin (PMSR) increased by 63.59 % by the modification of CF’s with nanohybrid coating. | [170] |
Carbon (polyphenylene terephthalaide, p-PPTA) fibers, Kevlar® K-29, dtex 3300; provided by Changzhou Gaoyuan group co., Ltd., Changzhou, China | Grafting polydopamine (PDA) plyethyleneimine (PEI)-graphene oxide onto CF surface; | Adhesive properties of CF to rubber matrix enhanced; | [171] |
Carbon fiber (T-650), 7 μm diameter; Cytec Engineering Materials, West Peterson, NJ | Carboxylated nanodiamond (ND) functionalized CFs | Carbon fiber microelectrodes (CFMEs) for neuro transmitter (for example dopamine) detection; sensitivity of detection increased by 2.1 times; limit of detection improved to 3 ± 1 nm | [172] |
Carbon fibers (tensile strength, 3500 MPa, Toray industries, Inc., ) | Chemical grafting of silica nanoparticles (SiO2 NPs) using the bridging toluene 2, 4-diisocyanate | Water contact angle decreased from 78.5 to 44.12°; surface energy increased from 35.87 to 50.36 mN/m; ILSS and IFSS enhanced by 50.97 and 35.92 % | [173] |
Carbon fibers provided by Toho Tenax, HTS 45 E23, linear density 800 tex, Japan | CNT deposition by aerosol spray deposition | Tensile strength of the modified CF/epoxy composite enhanced | [174] |
Carbon fibers (3 x 103 single filaments per tow; diameter, 7 μm; tensile strength 3500 MPa; tensile modulus 230 GPa; provided by Toray industries Inc., Tokyo, Japan | Carboxyl functionalized holloysite nanotubes (HNTs) grafted to CF surface using 3-aminopropyl triethoxy silane (APS) | Water contact angle decreased from 78.5 to 42.95°; surface energy increased from 35.87 to 62.13 mNm-1; anti hydrothermal aging behavior of the modified CF/methyl phenyl silicone resin (MPSR) composite improved; ILSS retention ratio enhanced by 93.61 % upon hydrothermal aging; | [175] |
Carbon fiber (12 K, 1.80 g/cm3), diameter, 7 μm; provided by Shenying carbon fiber co Ltd., China | Graphene oxide (GO) modified with hexamethylene diisocyanate (HDI) tripolymer coupling agent and grafting the modified GO to the oxidized CF surface | IFSS enhanced by 40.2 % | [176] |
Mesophase pitch-based CFs (Mitsubish Chemical Corp) used in the form of brush | Surface coating of CF with poly amine (PANI)/reduced graphene oxide (rGO) | Power density of microbial fuel cell increased by 1.21 times when used as anode electro catalyst; | [177] |
Unsized T300 PAN-based 12 K tow fibers; provided by Jilin petro chemicals, China | Oxidation with conc. HNO3 followed by treatment with ferrous oxalate; deposition of magnetite (Fe3O4) nanoparticles on CF surface | Removal efficiency of chemical oxygen demand, ammonia nitrogen and total phosphorous increased by 7.18, 10.30, and 9.40 % | [178] |
Carbon fibers, diameter 7 μm; tensile strength, 3500 MPa; purchased from Toray industries; | Grafting 3-aminopropyl triethoxy silane (APS) to CF; CF-Silaxone was further functionalized with SiO2 NPs (through TEOS hydrolysis) | Presence of Si-O-C bonds at the interface increased hydrothermal aging resistance; ILSS and IFSS increased by 46.79 and 39.61 % | [179] |
Carbon fibers, 3 mm length and 7 μm diameter | CNT grafted to oxidized CF surface through 3-amino propyl tri ethoxysilane (KH550) coupling agent | Flexural strength of cement pastes at 3, 7 and 25 days enhanced by 48.5, 42.2 and 45.5 % | [180] |
Carbon fibers, 12K A-42 procured from Dow Aksa, Turkey | Coating of porous carbon with Fe (small particles); Aqueous desized CFs were soaked in a solution of glucose and FeSO4 7H2O followed by drying and high temperature carbonization 950 °C in Ar/H2 for 6 h) | Modified CF find application in textile composites | [181] |
CF continuous biwoven 0°/90° PAN-based, supplied by MIS zoltek corporation Inc., | Electroless coating of Ni (nano to μm size) on CF surface (20 min); | 70 % enhancement in storage modulus; flexural strength and ILSS enhanced by 20 and 69 % | [182] |
T-700 PAN CFs provided by Japan, Tenax Co., | In situ growth of CNTs on CF surface using Fe nanoparticles as catalyst by CVD | Flexural strength of the epoxy composite enhanced by 28.1 % | [183] |
PAN based CF (length, 25-56 μm; diameter, 7 μm); provided by Nanjing fiber glass R and D Institute, China | Coating CF surface with SiO2 NPs (500 nm) by treatment with TEOS in the presence of NH3 | Hardness and elastic modulus of polyimide composites enhanced by 22 and 12.2 % respectively; wear resistance enhanced by 75 % | [184] |
Carbon fibers (diameter, 6-8 μm; length, 3-5 mm) provided by Nanjing Weida composite material Co Ltd., China | Growth of ZnO nanowires on the CF surface via hydrothermal synthesis | Paper based friction materials; greater wear resistance; stable dynamic friction coefficient; excellent tribological properties; promising wet paper-based friction material | [185] |
Carbon cloth fibers | Hydrothermal and chemical bath deposition were used to grow Co3O4 nanowires on carbon cloth fibers; and further modified with NiO and MnO2 to produce core shell structure; | Cell configuration of Co3O4@NiO (1:2)/cc(a|c)Co3O4@MnO2 (1:2)/cc , where cc is the carbon cloth support used, exhibited maximum power density of 33.8 mWcm-2 | [186] |
Carbon fiber | PdCo alloy NPs were supported on CFs by impregnation and reduction process and PdCo/CF was used as anode electro catalyst for the electrolysis of coal for hydrogen production | 16.9 % enhancement in the anode electrocatalyst performance for hydrogen production from coal electrolysis | [187] |
Carbon fiber T 300 (length, 1 mm; diameter 7 μm; strength, 4900 MPa; tensile modulus, 240 GPa) provided by the Japanese company Toho | Oxidized CF (with oxygen functionality; carboxyl, hydroxyl, carbonyl) was produced by treatment with HNO3; oxygen functionality reduced to hydroxyl groups by treatment with LiAlH4 and NaBH4; hydroxyl groups were further treated with silane coupling agent (vinyl triethoxy silane) to obtain silanized CF which were subsequently functionalized with Ag (treatment with AgNO3 and reduction with NaBH4) nanoparticles followed by grafting with acrylate | Silanized CF-silver-acrylate composite exhibited improved performance of electrical conductivity and antibacterial activity with allocation in medicine; | [188] |
High strength PAN-based 232 twill weave 3K carbon fabric provided by CNME international, China | Functionalized (hydroxyl carbonyl and ether type) multi walled CNTs were coated on CF surface by electrophoretic deposition (EPD); | Flexural strength and ILSS of modified CF epoxy composites increased by 15 and 18 % respectively | [189] |
PAN based carbon fiber tow (unsized/untreated, JILIN tow-24K precursor) provided by Carbon Nexus at Deakin University | Amino functionalized nano clay (montmorillonite) nano plates were grafted to the glycedyl trimethyl ammonium chloride functionalized CFs by cation exchange process; | Surface roughness, coefficient of friction and BET specific surface area of carbon fibers were enhanced by 61, 10 and 5 % respectively; | [190] |
Carbon fibers produced using wet-spun poly acrylonitrile (PAN) as the precursor fiber; unsized carbon fibers provided by carbon Nexus facility at Deakin University | Electrochemical deposition of graphene oxide sheets followed by modification with carbon dots | Improved selectivity and sensitivity (6.5 nA/μM) in the detection of neurotransmitter (dopamine); detection limit 0.02 μM | [191] |
Toray T700 carbon fibers, diameter, 7 μm; length, 10 cm; | In-situ growth of SC nanofibers by catalytic chemical vapour deposition at 1000 °C using Ni nanoparticles as catalyst coated on CF surface by electroplating from NiSO4 precursor (15 wt.%) | Enhanced microwave absorbance and oxidative resistance; reflectivity of microwave radiation is less than -10 dB in the frequency range of 9.2 to 11.7 GHz; | [192] |
JT-400A-3K, provided by Jilin Shen Zhou carbon fiber Co Ltd., | Co-grafting of CNT’s and graphene oxide on CF surface leading to uniform coating | Polar functional groups and surface energy enhanced; ILSS and IFSS of composites (epoxy matrix) enhanced by 48.12 and 83.39 % | [193] |
Carbon fibers (1K T-300TM) provided by Toray industries, Japan | MWCNT’s oxidized by conc. HNO3 treatment followed by grafting onto the CF surface by electrophoretic deposition | Tensile strength, failure strain, Young’s modulus of the composites (epoxy matrix) increased by 9.86, 44.01, and 12.4 % respectively | [194] |
T700, provided by Toray, Japan | Amine functionalized graphene oxide (GO-NH2) grafted covalently to CF surface | 36.4 % enhancement in IFSS | [195] |
Carbon fiber cloth | Graphene coating; Glucose oxidase immobilized modified CF used as anode and Bilirubin oxidase immobilized modified CF as cathode in the biofuel cells | Improved performance as electrodes for bio(glucose) fuel cells; power density of the fuel cell enhanced by 85.4 % | [196] |
PAN based CF two, T700, 12K; provided by Toray industries, Japan | Graphene oxide deposition; treatment with H2O2 and HNO3 in a electrophoretic deposition process | ILSS of the composite (with epoxy resin matrix) enhanced by 55.6 % | [197] |
Carbon fibers provided by Toray industries Inc., | Grafting of trisilanolphenyl-polyhedral oligomeric silsesquioxanes (trisilanolphenyl-POSS) nanoparticles using toluene – 2, 4-diisocaynate (TDI) as briding agent | ILSS and impact resistance of composite (methyl phenyl silicone resin, MPSR matrix) enhanced by 41.91 and 28.65 % respectively | [198] |
Carbon fibers, T700SC-12000-50C, 12K, provided by Toray industries, Inc., | Ag NPs deposited on CF by electrochemical means in the presence of poly(vinyl pyrrolidone) to control the geometric shape and size of Ag NP’s | Tensile strength of Ag-CF enhanced by 52.7 %; IFSS of composite (epoxy matrix) enhanced by 27.2; 2 fold enhancement in electrical conductivity compared to pristine CF observed | [199] |
Surface modification method | Reference |
---|---|
UV-ray irradiation for C-C bond scission | [205] |
Imidization for molecular assembly of condensed aromatic ring structure | [207] |
Oxidation with H2SO4 | [208,209] |
Oxidation with HNO3 followed by Si-O-Si grafting by treatment with silane coupling agent | [210] |
Sizing with thermoplastic comprising of cyclic phenyl sulfide | [211] |
Desizing, plasma treatment followed by sizing | [212] |
Graphitized spinal nano CF mixed with ethanol and ball milled followed by acid treatment | [213] |
Desizing; oxidation with a mixture of H2SO4 and HNO3; CN functionalization followed by applying performance paint for CF blade for wind power application | [214] |
CF in the form of woven carbon fiber (WCF) were treated with plasma followed by coating nanoparticles of ZnO | [215] |
Sizing with thermosetting resin; -COOH groups generated on the CF surface | [216] |
CNT functionalized CF; ILSS increased by 15 % | [217] |
Sizing with polycarbonate followed by silane agent KH-550 to generate Si-O-Si functionality | [218] |
Desizing; plasma treatment; coating with thermoplastic type resin oil agent (oil agent is of a poly urethane, polyethylene, polypropylene or acrylic type); interfacial bonding in composites enhanced | [219] |
ZnO NP functionalized CF for ultrahigh capacity super capacitor application | [220] |
Graphene oxide grafting to silane functionalized CF’s by electrophoretic deposition; IFSS of the composite enhanced | [221] |
Nano silica (20-100 nm) functionalized spiral nano carbon fiber | [222] |
Electro oxidation of CF (obtained from heating asphalt and PAN at 1200-3000 °C) using composite electrolyte containing nitrogen (urea) and –OH group (glycerol) containing compound; oxygen and nitrogen content enhanced; adhesion of CF to rein matrix improved | [223] |
Acryl chloride based CF grafted with branched tannic acid; IFSS increased from 49.5 to 93.2 Mpa | [224] |
CF modified with double sizing agent; treatment with silane agent (generates Si-O-Si groups) followed by grafting amino functionalized MWCNTs; cutting performance of composite enhanced by 24 %; tensile property improved by 29 %; | [225] |
Carbon nanofiber surface modified by treatment with silane, titanate and aluminate coupling agents; impact strength increased by 30 % | [226] |
Electron beam (50-1000 kgy; 1-3 mev) irradiation of acid treated CFs; multifunctional groups formed; mechanical strength improved | [227] |
Polypyrrole coating on CF’s by in situ polymerization of aqueous solution of pyrrole in the presence of oxidizing agent; good adsorption efficiency for sewage pollutants | [228] |
Enzymes (xylanase, invertase, alphaarabinose, glycosidase and lignin peroxidase) grafting on to organic agent (succinic acid, lactic acid in the presence of H3PO4) modified by microwave irradiation (15 min; 915-2450 MHz); potential catalyst for biomass conversion; | [229] |
CF oxidized (with KMnO4, H2O2, potassium perchlorate, potassium ferrate) and reduced (with HCl, HBr, oxalic acid, oxalate) followed by grafting biological species; used as biological bomb and biomedical material | [230] |
Double phase CNTs grafted to CF surface for power source devices | [231] |
CF is surface grafted with acryl amide; improvement in shear strength and mechanical property | [232] |
Nitrogen doping on CF surface by heat treatment in nitrogen containing atmosphere (NH3 gas; N2 gas); application as oxygen reduction electro catalyst (cathode) in oxygen dissolved seawater battery | [233] |
Electro oxidation, carbonization and activation resulted in acid-base active sites; enhanced hydrophobicity and pollutant adsorption from sewage waste; | [234] |
SiC NPs coating on CF followed by ball milling; toughness and wear resistance of material enhanced | [235] |
CF functionalized with titanium carbide and titanium diboride NPs, CF/TiC-TiB2; wear resistance, corrosion resistance and fatigue resistance enhanced; material is applicable for the fabrication of ship, automobile and air craft components; | [236] |
Ultrasound assisted electro chemical oxidation with KMnO4 in the presence of ammonium salts like ammonium carbonate; tensile strength increased; | [237] |
Graphene (mono/multilayer) coating followed by plasma (methane, ethane, ethane, ethyne, benzene, and ethanol) treatment | [238] |
Desizing, oxidation (with H2SO4 and HNO3) followed by grafting of thermosetting resin (unsaturated polyester resin, epoxy or phenolic resin); minimal performance loss; | [239] |
Oxidation with H2SO4; reduction with LiBH4; deposition of TiO2 NPs from tert butyltitanate precursor; wettability, roughness of the modified CF enhanced; mechanical properties of the composite increased; | [240] |
Treatment with silane coupling agent KH560 (RTM: 3-glycidoxy propyl trimethoxy silane); dispersion of the CF by treatment in diethyl ether and LiBH4 under ultrasound irradiation | [241] |
TiO2 NPs deposited on CF surface by treatment with titanium acid ester coupling agent; followed by thermal treatment in air at 600 °C; ILSS improved to 124.6 MPa; | [242] |
Pt NPs and Al2O3 NPs (using trimethyl aluminum precursor) were deposited on CF surface; heterogeneous catalyst with reduced hydrogenation activity; | [243] |
Oxidation (treatment with H2SO4 and HNO3) followed by treatment with fluorinated organosilane in DMSO; used as filter screen filler with pore size 2-100 μm | [244] |
Oxidation with conc. HNO3 followed by polyimide coating; improvement in mechanical property; | [245] |
Desizing, oxidation (conc HNO3 treatment), amination (by treatment with 3-amino propyl triethoxy silane) grafting graphene oxide; wettability and surface roughness enhanced; strength enhanced by 20-50 %; toughness enhanced by 35-40 % | [246] |
Coating silicone layer (< 1μm); modified CF should excellent stability; enhanced strength and rigidity of the CFRP | [247] |
Grafting of methyl methacrylate (MMA) monomer to Ni (submicron) coated CF; application in high temperature plastics with electromagnetic shielding potential | [248] |
Hydroxy functionalized CF (treatment with EtOH followed by ball milling) were grafted with pyrrole monomers followed by oxidation with H2SO4; modified CF/poly pyrrole composite exhibited excellent electromagnetic wave absorption performance in 7-17 GHz microwave band | [249] |
Anode electro oxidation in the presence of ammonium bicarbonate; graphite plate used as cathode in the anodized surface treatment | [250] |
SiO2 NPs functionalized CFs; thermal stability, wettability and roughness of CF are improved; in the composite material stress concentration is alleviated | [251] |
Hydroxy functionalized CF (by treatment with ethanol) and grafting acrylate monomer followed by oxidation with inert gas plasma; modified CF-polycarbonate composite find application in electric, aerospace, military and chemical industries | [252] |
Desizing, oxidation, acylation and grafting bis (3-aminophenyl ) phenyl phosphine oxide | [253] |
Carbon fiber in power form is oxidized with conc. H2SO4; oxygen functionality generated ; modified CF find application in aviation vehicles, buildings and chemical industries | [254] |
Carbon fiber fabric modified with β-PbO2 by linear sweep voltammetry; used as anode material for vanadium redox flow battery (VFB) ; energy conversion efficiency and power density increased | [255] |
Removal of styling agent; acidification ; in situ polymerization of amine monomer under microwave and sonication with sodium nitrite as initiator leading to polyamide amine grafting; specific desired functionality generated depending on the modifying chemical agent; wettability of modified CF improved; strength of the composite enhanced; | [256] |
Oxidation with conc. HNO3 | [257] |
Oxygen and nitrogen co-doped CF (PAN based) through electrochemical oxidation; excellent pseudo capacitance property | [258] |
Treatment with modified with hydroxyl group containing compound and poly amide; modified CF/polyamide composite is used for transportation, sports, medical and civil construction equipment | [259] |
Aniline functionalized CF; enhanced roughness and IFSS | [260] |
Mesoporous inter leaving multilayer graphene modified CF by coating with active metal (Li, Na, K, Cs) layer, carbon fiber felt, high temperature activation in inert atmosphere followed by removal of active metal and generating mesoporosity and graphitic carbon | [261] |
Oxidation, grafting of hexachlorocyclotriphosphazene phosphine followed by reacting with graphite to coat graphene on CF surface | [262] |
Cryogenic treatment of CF with liquid nitrogen; surface roughness of CF enhanced | [263] |
Grafting catechol type structure (treatment with epinephrine) on CF surface by polymerization; useful in CFRP, luminescent and antibacterial materials | [264] |
Electro oxidation with strong electrolyte (alkali metal hydroxide) followed by electro oxidation with week electrolyte (aq. NH3); modified CF/composite material useful in aerospace, defense and civil fields; | [265] |
Oxidation with potassium persulfate (K2S2O4) and AgNO3; mechanical performance enhanced; | [266] |
Plasma treatment under inert atmosphere for high temperature carbonization of CF (PAN based) sized with E-51; grafting liquid modifiers (maleic anhydride/acrylic acid) by atomizing spray nozzle, wettability, surface energy increased; ILSS enhanced | [267] |
Electrochemical deposition of graphene oxide followed by thermal treatment (80-600 °C; 10 sec – 60 min) in air/oxygen/ozone/nitrogen/argon/ammonia gas; | [268] |
Coating of phenolic (o-cresol, m-cresol) monomer and aldehyde (formaldehyde; n-propionaldehyde) in the presence of alkali metal hydroxide catalyst followed polymerization and carbonization; Shear strength increased by 12-53 %; adsorption capacity of the fiber enhanced; | [269] |
Oxidation with HNO3 (45-85 mass %) followed by hydrothermal treatment (120-180 °C; 126 MPa, 3-6 h) followed by thermal activation (800-950 °C; 2-4 h; N2/CO2); useful for the treatment of Sewage sludge; | [270] |
Surface etching by high energy particles beam (γ ray beam/plasma beam/X-ray beam; of energy 25-120 eV for 80-150 min) followed by cleaning with solvent under ultrasonic irradiation to generate micro nano groves on the surface; interfacial bonding strength enhanced; | [271] |
Oxidation by treatment with a mixture of H2SO4 and KMnO4; oxygen content enhanced by 22.7 %; strength improved; useful in aerospace, automobile, transportation; construction and chemical industries; | [272] |
Ultrasonic treatment (20-100 kHz; 200-2000 W; 20-70 °C; 15-40 min); treatment with silane coupling agent followed by oxidation with K2Cr2O7/sodium hypochlorite/H2O2/potassium persulfate; ultrasound pretreatment enhanced surface chemical modification; mechanical property of the CF enhanced; | [273] |
Nano graphene coating followed by plasma treatment; mechanical, conductivity and heat resistance properties enhanced; | [274] |
Electro chemical treatment in the presence of salts like ammonium bicarbonate, ammonium chloride, ammonium sulfate and ammonium oxalate (0.1-3 mA/cm2; 10-180 sec; 10-60 °C); tensile strength increased; shear strength enhanced; | [275] |
CNTs (single and multiwalled) oxidation with H2SO4 and HNO3; oxidized CNT’s were electrochemically grafted to CF’s | [276] |
Grafting with hexachlorocyclotriphosphazene followed by caprolactum monomers; surface reactivity of CF enhanced; | [277] |
CNT’s were grown on CF surfaces by chemical vapour deposition with Ni catalyst | [278] |
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