Comprehensive Experiment: Synthesis and Properties of pH-Responsive Acrylic Acid/Styrene/2-Ethylhexyl Acrylate Copolymer Hydrogel
WEN Jia-Xin1,2, LIU Yun-Xia1, YAO Jian-Yu1, DUAN Yi-Qin1
1. School of Chemical & Pharmaceutical Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China;
2. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
Abstract The acrylic acid/styrene/2-ethylhexyl acrylate copolymer hydrogel was prepared by emulsion polymerization method, and was characterized by fourier transform infrared spectroscopy (FTIR). The influence of pH value on the swelling ratio of the hydrogel was investigated. The thiourea sustained-release system was synthesized by the hydrogel. The results showed that the hydrogel with pH-responsive and excellent sustained-release property had much higher swelling ratio in alkaline conditions than those in neutral or acidic conditions. The experimental process was designed as a comprehensive experiment for higher vocational students, and the practical explorations were carried out. The results showed that it had significant effect on improving students' professional comprehensive ability, broadening their professional vision, and training their creative and scientific thinking.
WEN Jia-Xin, LIU Yun-Xia, YAO Jian-Yu, DUAN Yi-Qin. Comprehensive Experiment: Synthesis and Properties of pH-Responsive Acrylic Acid/Styrene/2-Ethylhexyl Acrylate Copolymer Hydrogel[J]. Chinese Journal of Chemical Education, 2017, 38(10): 43-46.
