磁性半互穿网络智能水凝胶的合成及性质评价  

Synthesis and Characterization of both Temperature and pH Sensitivity Magnetic Semi-IPN Hydrogel

作　　者：蒋山泉 邓小红 李强 凌立新 孙向卫 JIANG Shan-quan;DENG Xiao-hong;LI Qiang;LING Li-xin;SUN Xiang-wei(Chongqing key Laboratory of Environment&Materials Remediation,Chongqing University of Art and Sciences,Chongqing 402160,China)

机构地区：[1]重庆文理学院水环境修复重点实验室,重庆402160

出　　处：《高分子通报》2020年第2期47-53,共7页Polymer Bulletin

基　　金：重庆高校创新团队建设计划项目(CXTDX201601037);重庆永川科委科技专项(基于"海绵城市"理念的雨水/污水处理及再利用技术示范YCSTC,2016CB7002)。

摘　　要：以甲基丙烯酸(MAA)、N-异丙基丙烯酰胺(NIPAAm)、丙烯酰胺(AM)为原料,N,N′-亚甲基双丙烯酰胺(MBA)为交联剂,利用IPN技术并结合磁性的γ-Fe2O3增强剂,在水溶液中制备了半互穿网络水凝胶(PMAA/PAM-NIPAAm/γ-Fe2O3),研究了水凝胶的溶胀性﹑热稳定性和电磁性。实验表明,水凝胶形成稳定的IPN互穿网络结构且该水凝胶具温度、pH双重敏感性和顺电磁性。所合成的水凝胶在低临界溶解温度31℃以下,具有明显正向温敏性,高于此温度,水凝胶的温度敏感性会逐渐减弱。产品成功克服了NIPAAm类水凝胶的温缩性。In this paper, MAA,NIPAAm,AM as monomer,γ-Fe2O3 as enhancers and MBA as crosslinking agent, semi-interpenetrating(semi-IPN) hydrogels PMAA/PAM-NIPAAm/γ-Fe2O3 was prepared, by solution polymerization on 50℃. The swelling behavior, thermal properties and, magnetic properties were investigated. The test results showed that the hydrogels formed a stable IPN interpenetrating network structure and exhibited temperature sensitivity, pH sensitivity and paramagnetism. Below 31℃ the swelling ratios of the semi-IPN hydrogels increased with increasing of temperature, but above 31℃, the temperature sensitivity of the semi-IPN hydrogels slight decreased with increasing of temperature. However, the thermal shrinkage of NIPAAm hydrogels is successfully overcome.

关 键 词：Γ-FE2O3 半互穿网络 温敏性 PH响应 

分 类 号：TQ427.26[化学工程]