期刊
SCIENCE CHINA-CHEMISTRY
卷 64, 期 9, 页码 1560-1568出版社
SCIENCE PRESS
DOI: 10.1007/s11426-021-1010-3
关键词
free-radical polymerization; monomer sequence; hydrogel; cation-pi interactions; underwater adhesion
资金
- JSPS KAKENHI [JP17H06144, JP17H06376, JP21K14676]
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD)
This study demonstrates that copolymer hydrogels with rich one-component-rich segments exhibit higher mechanical strength compared to those with adjacent-rich monomer sequences. In saltwater, hydrogels with a rich cation-pi adjacent sequence show excellent mechanical strength and underwater adhesion.
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-component-rich segments are mechanically stronger than those with adjacent-rich monomer sequences in water, while hydrogels with a rich cation-pi adjacent sequence showed excellent mechanical strength and underwater adhesion in saltwater (0.7 M NaCl). 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.
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