Preparation of pH sensitive polyacrylic acid( PAAc) macroporous hydrogels in aqueous NaCl solutions and their characterization
In this study, macroporous, pH sensitive polyacrylic acid hydrogels were prepared by using different concentration of aqueous NaCl solutions as the polymerization medium. The optical photos showed that the pore morphologies of the hydrogels were dependent on the concentration of NaCl. Swelling studies showed an increase in equilibrium swelling ratio as the NaCl concentration in the polymerization medium increased from 0 to 0.7mol/L. The hydrogels exhibited stronger sensitivity to pH changes, and showed much faster reswelling and deswelling response rates with the NaCl concentration increasing in the polymerization medium.
polyacrylic acid aqueous NaCl solutions macroporous pH sensitivity swelling ratio
Yuhua Xue Wenyuan Zhao Shoufeng Sun Hu Yu
Institute of Materials Science and Engineering, Ocean University of China,Qingdao 266100, China
国际会议
青岛
英文
1999-2002
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）