Facile tuning of hydrogel properties by manipulating cationic-aromatic monomer sequences  

作　　者：Hailong Fan Yirong Cai Jian Ping Gong 

机构地区：[1]Institute for Chemical Reaction Design and Discovery(WPI-ICReDD),Hokkaido University,Sapporo,001-0021,Japan [2]Graduate School of Life Science,Hokkaido University,Sapporo,001-0021,Japan [3]Faculty of Advanced Life Science,Hokkaido University,Sapporo,001-0021,Japan [4]Global Station for Soft Matter GI-CoRE,Hokkaido University,Sapporo,001-0021,Japan

出　　处：《Science China Chemistry》2021年第9期1560-1568,共9页中国科学（化学英文版）

基　　金：supported by JSPS KAKENHI Grant(JP17H06144,JP17H06376,JP21K14676);Institute for Chemical Reaction Design and Discovery(WPI-ICRe DD)established by World Premier International Research Initiative(WPI),MEXT,Japan。

摘　　要：Copolymer hydrogels formed from cationic and aromatic monomers with identical monomer compositions but different average sequences were synthesized by free-radical copolymerization in various solvents.We found that hydrogels with one-componentrich segments are mechanically stronger than those with adjacent-rich monomer sequences in water,while hydrogels with a rich cation-πadjacent sequence showed excellent mechanical strength and underwater adhesion in saltwater(0.7 M Na Cl).The molecular mechanisms for these behaviors are discussed in terms of polymer structures.This work reveals the importance of monomeric sequences in determining hydrogel properties and provides a facile approach to develop hydrogels with different properties but the same monomer composition.

关 键 词：free-radical polymerization monomer sequence HYDROGEL cation-πinteractions underwater adhesion 

分 类 号：TQ427.26[化学工程]