高强度聚N-异丙基丙烯酰胺-黏土纳米复合水凝胶的制备及表征  

Fabrication and Characterization of High Strength PNIPAm/Clay Nanocomposite Hydrogels

作　　者：刘艳霞[1] 周莉莉 冯献起[1] LIU Yanxia;ZHOU Lili;FENG Xianqi(College of Engineering,Yanching Institute of Technology,Langfang 065201,China)

机构地区：[1]燕京理工学院工学院

出　　处：《信阳师范学院学报（自然科学版）》2019年第3期449-452,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(21174017);廊坊市科技支撑计划(2018013124)

摘　　要：采用原位聚合方法制备出一种具有高强度、良好温度响应性的聚N-异丙基丙烯酰胺/黏土纳米复合水凝胶,并用红外光谱、扫描电镜、透射电镜对其结构进行了分析.测试结果表明,纳米黏土与聚合物分子链之间具有强的氢键作用,水凝胶具有均匀的多孔聚合物骨架,且黏土可均匀地分散在聚合物基体中.热力学测试结果表明,黏土的引入未对水凝胶热敏特性产生显著影响,即三种水凝胶均在35℃左右产生明显的相转变;同时,溶胀动力学测试结果表明,水凝胶样品在该温度下具有明显的去溶胀特性.机械性能测试结果表明,纳米黏土的加入,可显著提高水凝胶的机械性能.A kind of novel high strength PNIPAM/Clay nanocomposite hydrogel with superior thermo- responsive nature was successfully prepared using in-situ polymerization method.The results of analysis on the structure of hydrogels using FT-IR spectra,scanning electronic microscopy,and transmittance electronic microscopy technologies indicated that the clay platelets were uniformly dispersed into the polymer matrix based on the hydrogen bond interactions among the clay platelets and polymer chains,which facilitated the formation of uniform internal interpenetrating porous network structure.The results of differential scanning calorimetry illustrated that the incorporation of clay into the polymer matrix would not significantly reduce the sensitiveness of thermo-responsive performance of hydrogels,and the study of swelling kinetics demonstrated that the clearly de-swelled behavior occurred when the hydrogels were immersed into the water at 35 ℃.The mechanical strength of hydrogels could be extensively enhanced from the incorporation of nano-clay platelets.

关 键 词：水凝胶 温敏性 高强度 纳米复合材料 

分 类 号：TB381[一般工业技术—材料科学与工程]