Article
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Preserved in Portico This version is not peer-reviewed
NIR-mediated Deformation from a CNT-based Bilayer Hydrogel
Version 1
: Received: 15 March 2024 / Approved: 18 March 2024 / Online: 18 March 2024 (09:28:47 CET)
A peer-reviewed article of this Preprint also exists.
Long, S.; Liu, C.; Ren, H.; Hu, Y.; Chen, C.; Huang, Y.; Li, X. NIR-Mediated Deformation from a CNT-Based Bilayer Hydrogel. Polymers 2024, 16, 1152. Long, S.; Liu, C.; Ren, H.; Hu, Y.; Chen, C.; Huang, Y.; Li, X. NIR-Mediated Deformation from a CNT-Based Bilayer Hydrogel. Polymers 2024, 16, 1152.
Abstract
Shape-shifting polymers are widely used in various fields such as intelligent switches, soft robots and sensors, which require both multiple stimulus response functions and qualified mechanical strength. In this study, a novel near infrared light (NIR) responsible shape-shifting hydrogel system was designed and fabricated, through embedding vinylsilane modified carbon nanotubes (CNTs) into particle-double network (P-DN) hydrogels by micellar copolymerization. The dispersed brittle Poly(sodium 2-acrylamido-2-methylpropane-1-sulfonate) (PNaAMPS) network of the microgels can serves as sacrificial bonds to toughen the hydrogels, and the CNTs endow it NIR photothermal conversion ability. The results show that the CNTs embedded P-DN hydrogels present excellent mechanical strength, i. e. fracture strength of 312 kPa and fracture strain of 357%. Moreover, an asymmetric bilayer hydrogel, where the active layer contains CNTs, can achieve 0°–110° bending deformation within 10 min under NIR irradiation and can realise complex deformation movement. This study provides a theoretical and experimental basis for the design and manufacture of photoresponsive soft actuators.
Keywords
temperature-responsive hydrogel; particle-double network; photothermal conversion; actuator; carbon nanotubes
Subject
Chemistry and Materials Science, Polymers and Plastics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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