Supramolecular Semi-convertible Hydrogel Enabled Self-Healing Responsive Lubrication Under Dynamic Shearing  

作　　者：Xuewei Zhang Kaiyao Shi Xuhao Yang Jian Wang Huan Liu Wenlong Song Shutao Wang 

机构地区：[1]State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry,Jilin University,Changchun 130023 [2]Department of Cardiology,Jilin Provincial Key Laboratory for Genetic Diagnosis of Cardiovascular Disease,China-Japan Union Hospital of Jilin University,Changchun 130023 [3]CAS Key Laboratory of Bio-inspired Materials and Interfacial Science,CAS Center for Excellence in Nanoscience,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190 [4]University of Chinese Academy of Sciences,Beijing 100190 [5]Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education,School of Chemistry,Beijing Advanced Innovation Center for Biomedical Engineering,International Research Institute for Multidisciplinary Science,Beihang University,Beijing 100191

出　　处：《CCS Chemistry》2023年第11期2482-2496,共15页中国化学会会刊（英文）

基　　金：supported financially by the National Natural Science Foundation of China(grant nos.22175075,22035008,21972155,21774044,21425314,21434009,21421061).

摘　　要：Cartilage-inspired hydrogel has attracted great interest due to its tunable mechanics and low friction.However,it is incapable of self-healing under a complex dynamic shearing environment.In this work,a self-healing semi-convertible hydrogel(SHSCH)is developed,which can recover its unique active lubricating function under shearing.Based on the cooperating strategy of noncovalent and covalent bonding,the SHSCH is composed of three interpenetrated networks including:(1)shearresponsive N-fluorenylmethoxycarbonyl-L-tryptophan(FT)supramolecular network,(2)self-healing polyhydroxyethyl acrylamide(PHEAA)network,and(3)rigid polyvinyl alcohol(PVA)covalent network.The shearresponsive lubricating function and mechanical property can be self-healed under a shearing environment through the noncovalent hydrogen-bonding assembly of PHEAA associated by theπ–πassembly of FT.The asdeveloped SCH provides a self-healing model comparable with traditional self-healing lubricating materials through encapsulating lubricant microcapsules or infusing lubricants onto surfaces.We demonstrated a proofof-concept of the self-healing lubrication of a simplified artificial worn cartilage model under a dynamic shearing condition.This study will offer a potential strategy on designing the self-healing soft devices under dynamic stimuli far beyond the lubricating materials.

关 键 词：semi-convertible hydrogel SELF-HEALING shear response lubrication supramolecular hydrogel 

分 类 号：O63[理学—高分子化学]