温敏多孔纳米复合水凝胶的制备及性能研究  

Preparation and Properties of Temperature-sensitive Porous Nanocomposite Hydrogels

作　　者：韩汝森 王毓 任俊鹏 汤婷 王莉霞 HAN Ru-sen;WANG Yu;REN Jun-peng;TANG Ting;WANG Li-xia(School of Chemistry and Materials Science,Guizhou Education University,Guizhou Guiyang 510018,China)

机构地区：[1]贵州师范学院化学与材料学院,贵州贵阳510018

出　　处：《广州化工》2020年第7期42-45,共4页GuangZhou Chemical Industry

基　　金：贵州师范学院大学生科研项目(2019DXS005);贵州省自然科学基金(黔科合基础[2018]1122);贵州省教育厅青年科技人才成长项目(黔教合KY[2018]263);贵州师范学院2019年度校级课题《表面改性“废弃秸秆”吸附材料在有机水体污染处理中的应用研究》研究成果(2019YB002);国家自然科学基金(No.21464005)。

摘　　要：试验以钠基膨润土,丙烯酰胺和双丙酮丙烯酰胺为主要原料,以聚乙二醇为致孔剂,N,N-亚甲基双丙烯酰胺为交联剂,采用插层聚合法和接枝共聚致孔法制备了温敏多孔纳米复合水凝胶。研究了复合水凝胶的失水率性能和对污染水体中Cr(Ⅵ)的去除效果。结果表明,制备的纳米复合水凝胶具备温度响应性,随着温度的升高,水凝胶的失水率可达43.03%。复合水凝胶随着投加量的增加,对Cr(Ⅵ)去除率越高。水凝胶投加量为5.5 g时,最好吸附量可达81.3%。Temperature-sensitive porous nanocomposite hydrogels were prepared from sodium bentonite,acrylamide and diacetone acrylamide,using polyethylene glycol as pore-making agent and N,N-methylene diacrylamide as cross-linking agent by intercalation polymerization and graft copolymerization. The water loss rate and removal effect of Cr( Ⅵ)in polluted water were studied. The results showed that the nanocomposite hydrogel had the temperature responsiveness.With the increase of temperature,the water loss rate of hydrogel can reach 43. 03%. The removal rate of Cr( Ⅵ) was higher with the increase of compound hydrogel dosage. When the dosage of hydrogel was 5. 5 g,the best adsorption capacity was 81. 3%.

关 键 词：双丙酮丙烯酰胺 膨润土 Cr(Ⅵ) 热敏性水凝胶 

分 类 号：TG146[一般工业技术—材料科学与工程]