Light-controlled switchable underwater adhesive  

作　　者：Song Yang Yanfei Ma Chenxi Qin Zhizhi Zhang Jianqing Yu Xiaowei Pei Bo Yu Wenbo Sheng Feng Zhou Weimin Liu 

机构地区：[1]Northwestern Polytechnical University,Center of Advanced Lubrication and Seal Materials,School of Materials Science and Engineering,Xi'an,China [2]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou,China [3]Shandong Laboratory of Yantai Advanced Materials and Green Manufacture,Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering,Yantai,China

出　　处：《SmartMat》2024年第2期115-123,共9页智能材料（英文）

基　　金：support from the National Natural Science Foundation of China (Nos.22102201,22032006,52205232,and 22072169);the National Key Research and Development Program of China (No.2021YFA0716304);NSAF (No.U2030201);Gansu Province Basic Research Innovation Group Project (No.22JR5RA093);Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing (No.AMGM0717);the Special Research Assistant Project of the Chinese Academy of Sciences.

摘　　要：Despite extensive efforts in designing and preparing switchable underwater adhesives,it is not easy to regulate the underwater adhesion strength locally and remotely.Here,we design and synthesize photoreversible copolymer of poly[dopamine methacrylamide-co-methoxyethyl-acrylate-co-7-(2-methacryloyloxyethoxy)-4-methylcoumarin].Due to the dynamic formation and breaking of chemical crosslinking networks within the smart adhesives,the material shows widely tunable adhesion strength from∼150 to∼450 kPa and long-range reversible maneuverability under orthogonal 254 and 365 nm ultraviolet light stimulation via the coumarin dimerization and cycloreversion.Moreover,the adhesive exhibits good circulation performance and stability in an acid–base environment.It also demonstrated that the bolt can be coated with the smart adhesive material for on-demand bonding.This design principle opens the door to the development of remotely controllable high-performance smart underwater adhesives.

关 键 词：dynamic covalent bonds PHOTORESPONSIVE reversible adhesion switchable adhesion underwater adhesion 

分 类 号：TB381[一般工业技术—材料科学与工程]