Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Synthesis and Characterization of Bromine- and Hydroxyl-Functionalized Polyaminals for CO₂ Capture

Version 1 : Received: 23 December 2023 / Approved: 25 December 2023 / Online: 25 December 2023 (09:24:20 CET)

How to cite: Alotaibi, M. M.; Alharthi, A. M.; Alkayal, N. S.; Alrayyani, M. A. Synthesis and Characterization of Bromine- and Hydroxyl-Functionalized Polyaminals for CO₂ Capture. Preprints 2023, 2023121792. https://doi.org/10.20944/preprints202312.1792.v1 Alotaibi, M. M.; Alharthi, A. M.; Alkayal, N. S.; Alrayyani, M. A. Synthesis and Characterization of Bromine- and Hydroxyl-Functionalized Polyaminals for CO₂ Capture. Preprints 2023, 2023121792. https://doi.org/10.20944/preprints202312.1792.v1

Abstract

Increased CO2 emissions and air pollution impact the environment and human health. In this manner, new functionalized polyaminal-based polymers are synthesized via a one-pot polycondensation reaction of melamine with aldehyde monomers 2-bromo-1-naphthaldehyde and 2-hydroxy-1-naphthaldehyde to yield bromine- hydroxyl- functionalized polymer networks PAN-BrNA and PAN-HNA, respectively. The polyaminals porosity parameters were investigated and applied as an adsorbent for CO2 capture. FTIR, solid-state 13C NMR, and X-ray diffraction verified the PANs structure development. A scanning electron microscope and N2 adsorption-desorption methods were utilized to identify the porous properties of the polymers at 77 K. The Brunauer-Emmett-Teller (BET) surface area of PAN-BrNA and PAN-HNA is (16.6990 m2/g) and (716.7568 m2/g), respectively. At 273 K, PAN-BrNA and PAN-HNA can take CO2 gas up to (4.42786 cm3/g) and (47.55 cm3/g), respectively. The findings show that inserting functional groups has a significant impact on surface area and porosity parameters, as well as CO2 uptake.

Keywords

porous organic polymer, polyaminal-linked polymers, melamine, surface area, CO2 capture

Subject

Chemistry and Materials Science, Polymers and Plastics

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