Editing the Shape Morphing of Monocomponent Natural Polysaccharide Hydrogel Films  

作　　者：Hao Hu Chao Huang Massimiliano Galluzzi Qiang Ye Rui Xiao Xuefeng Yu Xuemin Du 

机构地区：[1]Institute of Biomedical&Health Engineering,Shenzhen Institute of Advanced Technology(SIAT),Chinese Academy of Sciences(CAS),Shenzhen 518035,China [2]Key Laboratory of Polymeric Materials and Application Technology of Hunan Province,Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education,School of Chemistry,Xiangtan University,Xiangtan 411105,China [3]Institute of Advanced Materials Science and Engineering,Shenzhen Institute of Advanced Technology(SIAT),Chinese Academy of Sciences(CAS),Shenzhen 518035,China [4]State Key Laboratory of Fluid Power&Mechatronic System,Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,China

出　　处：《Research》2021年第1期835-846,共12页研究（英文）

基　　金：supported by the National Key R&D Program of China(2017YFA0701303,2017YFC0111202);the National Natural Science Foundation of China(52022102,52003287);the Youth Innovation Promotion Association of CAS(2019353);the CAS Key Laboratory of Health Informatics,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences(2011DP173015);the Foundation of Hunan Educational Committee(18K030);the Shenzhen Science and Technology Innovation Committee(JCYJ20180507182051636,KQJSCX20180330170232019).

摘　　要：Shape-morphing hydrogels can be widely used to develop artificial muscles,reconfigurable biodevices,and soft robotics.However,conventional approaches for developing shape-morphing hydrogels highly rely on composite materials or complex manufacturing techniques,which limit their practical applications.Herein,we develop an unprecedented strategy to edit the shape morphing of monocomponent natural polysaccharide hydrogel films via integrating gradient cross-linking density and geometry effect.Owing to the synergistic effect,the shape morphing of chitosan(CS)hydrogel films with gradient cross-linking density can be facilely edited by changing their geometries(length-to-width ratios or thicknesses).Therefore,helix,short-side rolling,and longside rolling can be easily customized.Furthermore,various complex artificial 3D deformations such as artificial claw,horn,and flower can also be obtained by combining various flat CS hydrogel films with different geometries into one system,which can further demonstrate various shape transformations as triggered by pH.This work offers a simple strategy to construct a monocomponent hydrogel with geometry-directing programmable deformations,which provides universal insights into the design of shape-morphing polymers and will promote their applications in biodevices and soft robotics.

关 键 词：effect LINKING GEOMETRY 

分 类 号：O63[理学—高分子化学]