Near-Infrared Light-Driven Shape-Morphing of Programmable Anisotropic Hydrogels Enabled by MXene Nanosheets

作     者：Pan Xue Hari Krishna Bisoyi Yuanhao Chen Hao Zeng Jiajia Yang Xiao Yang Pengfei Lv Xinmu Zhang Arri Priimagi Ling Wang Xinhua Xu Quan Li 

作者机构：School of Materials Science and Engineering Tianjin University Tianjin 300350 China Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent OH 44242 USA Smart Photonic Materials Faculty of Engineering and Natural Sciences Tampere University P.O. Box 541 33101 Tampere Finland 

出 版 物：《Angewandte Chemie》 (应用化学)

年 卷 期：2020年第133卷第7期

页      面：3432-3438页

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

主　　题：anisotropic hydrogels MXene NIR light soft robotics 

摘      要：Herein, we report near-infrared (NIR) light-driven shape-morphing of programmable MXene-containing anisotropic hydrogel actuators that are fabricated through in situ free-radical copolymerization of a judiciously designed MXene nanomonomer with thermosensitive hydrogel network. A low electric field (few V mm −1 ) was found to enable a spatial distribution of MXene nanosheets and hence introduce anisotropy into the hydrogel network. Programmable anisotropic hydrogel actuators were developed by controlling ITO electrode pattern, direct-current (DC) electric field direction and mask-assisted photopolymerization. As a proof-of-concept, we demonstrate NIR light-driven shape morphing of the MXene-containing anisotropic hydrogel into various shapes and devise a four-arm soft gripper that can perform distinct photomechanical functions such as grasping, lifting/lowering down and releasing an object upon sequential NIR light exposure.