Synthesis and properties of a dual responsive hydrogel by inverse microemulsion polymerization
Tao Wan Min Xu Liyi Chen Daqing Wu Wenzhong Cheng Ruixiang Li Chuzhang Zou
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A novel dual responsive hydrogelwas synthesized by inversemicroemulsion polymerization, using itaconic acid as pH-responsive monomer and N- isopropylacrylamide as thermo-responsivemonomer. pH- and temperature-sensitivity and dynamic viscoelasticity behaviour of the dual responsive hydrogels were investigated. Dual responsive hydrogels showed remarkable pH- and temperature-sensitivity and enhanced viscoelastic behaviour under high stress. Temperature-induced shrinkage range of the dual responsive hydrogels was higher and broader than that of the conventional poly(N-isopropylacrylamide) hydrogel. FTIR revealed the structure of dual responsive hydrogels. The as-synthesized regular and sphere-like hydrogel particles had the average particle size of 49 nm in the range of 30-78 nm.
Tao Wan1 2 Min Xu2 Liyi Chen1 Daqing Wu3 Wenzhong Cheng2 Ruixiang Li2 Chuzhang Zou2
Volume 135, 2023
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