文献类型：期刊文献

中文题名：多孔性热敏水凝胶P(NIPA-co-SMA)的合成及性质

英文题名：SYNTHESIS AND THE PROPERTIES OF MICROPOROUS THERMO-SENSITIVE HYDROGELS P(NIPA-co-SMA)

作者：何江川[1];林强[1]

第一作者：何江川

机构：[1]北京联合大学生物化学工程学院

第一机构：北京联合大学生物化学工程学院

年份：2005

卷号：21

期号：2

起止页码：81-84

中文期刊名：高分子材料科学与工程

外文期刊名：Polymeric Materials Science & Engineering

收录：CSTPCD;;EI(收录号：2005169052617);Scopus(收录号：2-s2.0-16644365115);北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：热敏水凝胶;N-异丙基丙烯酰胺;致孔剂;多孔性

外文关键词：thermo-sensitive hydrogels; N-isopropylacrylamide; pore-foaming agent; microporous

摘要：以亚甲基双丙烯酰胺(MBA)为交联剂,CaCO3为致孔剂,通过N-异丙基丙烯酰胺(NIPA)与甲基丙烯酸钠(SMA)的溶液自由基聚合,制备了一系列多孔性热敏水凝胶;利用环境扫描电镜观察了溶胀状态下的凝胶多孔结构,测定了水凝胶的相转变温度、平衡溶胀率(SR)、热收缩动力学,并考察了致孔剂和交联剂的用量对上述性质的影响;与同条件合成的无孔凝胶相比,多孔凝胶的相变温度基本不变,但室温下SR增大了约50%,100℃时的热缩响应时间缩短至约3min;同时,SR和温度响应灵敏度随致孔剂用量的增加而增加,而交联剂用量增加则使SR降低。
A series of fast-responding microporous thermo-sensitive hydrogels P(NIPA-co-SMA) were prepared through the free radical polymerization of NIPA and a small quantity of SMA as anionic co-monomer in aqueous solution with calcium carbonate as the pore-forming agent. The porous conformation of the products was observed through the Environmental Scan Electron Microscope, the critical volume phase transition point, the equilibrium swelling ratio and the thermo-shrink kinetics were characterized, and the effects of the pore-forming agent and the cross-linking agent on the foregoing properties were examined. It is found that the porous gels presents nearly the same transition point as the analogous non-porous ones, while their SR increases about 50%, and the thermo-responding time (100 ℃) decreases to about 3 min. Meantime, SR and the thermo-sensitivity of the gels increase as the content of pore-forming agent increases, while SR decreases when that of the cross-linking agent increases.