In-situ polymerization for mechanical strong composite actuators based on anisotropic wood and thermoresponsive polymer  

作　　者：Lian Chen Xianshuo Wei Feng Wang Shaoju Jian Weisen Yang Chunxin Ma Gaigai Duan Shaohua Jiang 

机构地区：[1]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,International Innovation Center for Forest Chemicals and Materials,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China [2]Fujian Key Laboratory of Eco-Industrial Green Technology,College of Ecology and Resources Engineering,Wuyi University,Wuyishan 354300,China [3]Shandong Key Laboratory of Biochemical Analysis,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [4]State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University,Haikou 570228,China

出　　处：《Chinese Chemical Letters》2022年第5期2635-2638,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51803093,51903123);Natu-ral Science Foundation of Jiangsu Province(No.BK20190760);Open Project of Chemistry Department of Qingdao University of Science and Technology(No.QUSTHX201921);Open Fund of Fujian Provincial Key Laboratory of Eco-Industrial Green Technology,China(Nos.WYKF-EIGT2020–3,WYKF-GC2021–1).

摘　　要：Stimuli-responsive hydrogels hold an irreplaceable statue in intelligent actuation materials because of their reversible stretchability and excellent biocompatibility.However,the poor mechanical performance and complicated fabrication process of anisotropic structures severely limit their further applications.Herein,we report a high-strength thermoresponsive wood-PNIPAM composite hydrogel actuator with complex deformations,through a simple in-situ polymerization.In this composite hydrogel actuator,the anisotropic wood and the thermoresponsive PNIPAM hydrogel hydroel can work together to pro-vide bending and even other complex deformations.Owing to strong interfacial interaction,this actuator perfectly realized the combination of good mechanical properties(∼1.1 MPa)and fast actuation speed(∼0.9 s).In addition,by adjusting the orientation direction of wood,this actuator can achieve various complex deformations.Such composite hydrogel actuator could be a good candidate for intelligent appli-cations,such as intelligent actuators,smart valves,manipulators and even soft robots.

关 键 词：ACTUATOR Anisotropic structure THERMORESPONSIVE WOOD 

分 类 号：O631.5[理学—高分子化学] O648.17[理学—化学]