Influence of polyelectrolyte on the thermosensitive property of PNIPAAm-based copolymer hydrogels.
A new family of poly(NIPAAm-co-2-acrylamido-2-methyl-1-propanesulfonic acid) [P(NIPAAm-co-AMPSA)] hydrogels was synthesized by incorporating negative charged AMPSA to the backbone of the PNIPAAm-based hydrogel. The effect of polyelectrolyte (i.e., PAMPSA) on the thermosensitive property of PNIPAAm hydrogels was investigated. It was found that P(NIPAAm-co-AMPSA) hydrogels exhibited unique honey-comb-like 3D porous structure having rigid cell wall as well as enhanced mechanical property. The incorporation of AMPSA into PNIPAAm backbones also led to a significant increase in swelling capability at room temperature when comparing to pure PNIPAAm hydrogels. In addition, the shrinking rate upon heating was significantly improved if the AMPSA content in P(NIPAAm-co-AMPSA) hydrogels was less than 10 wt%.
Zhang
Xian-Zheng
XZ
Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, PR China.
Chu
Chih-Chang
CC
D000180:Acrylic Resins / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D001696:Biomechanical Phenomena; D004573:Electrolytes; D020100:Hydrogels; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013816:Thermodynamics
D000180:Acrylic Resins; D001672:Biocompatible Materials; D004573:Electrolytes; D020100:Hydrogels; D011108:Polymers; D013451:Sulfonic Acids; C052970:poly-N-isopropylacrylamide; C077118:poly(2-acrylamido-2-methyl-1-propanesulfonic acid)