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Double Hydrogen‐Bonding pH‐Sensitive Hydrogels Retaining High‐Strengths Over a Wide pH Range
Author(s) -
Gao Han,
Wang Ning,
Hu Xiufeng,
Nan Wenjing,
Han Yanjiao,
Liu Wenguang
Publication year - 2013
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201200548
Subject(s) - comonomer , self healing hydrogels , ethylene glycol , hydrogen bond , copolymer , polymer chemistry , materials science , monomer , ultimate tensile strength , methacrylate , methacrylic acid , acrylic acid , chemical engineering , molecule , polymer , chemistry , composite material , organic chemistry , engineering
Traditional pH‐sensitive hydrogels inevitably suffer strength deterioration while the responsive weak acid or base groups are in the ionized state. In this study, we report on a facile approach to fabricate a novel pH‐sensitive high‐strength hydrogel from copolymerization of two hydrogen‐bonding motif‐containing monomers, 3‐acrylamidophenylboronic acid and 2‐vinyl‐4,6‐diamino‐1,3,5‐triazine with a crosslinker N , N ‐methylenebisacrylamide through hydrophilic optimization of the comonomer oligo(ethylene glycol) methacrylate. The double hydrogen bonding hydrogel exhibits both high tensile and compressive strengths over a broad pH range due to the unique ability to maintain at least one type of hydrogen‐bonding crosslink over the whole course of pH change.