聚丙烯酰胺/聚甲基丙烯酸(2-甲基氨基)乙酯高强度双网络水凝胶的制备及pH响应性  

Preparation and pH Sensitivity of Polyacrylamide/Poly(2-methylamino)ethyl Methacrylate High Strength Double Network Hydrogel

作　　者：曾小平[1] 刘璨 郝玉鹏 董贤政 陈柳[1] 熊丽君[1] Xiaoping Zeng;Can Liu;Yupeng Hao;Xianzheng Dong;Liu Chen;Lijun Xiong(School of Materials Science&Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430205

出　　处：《高分子材料科学与工程》2021年第5期87-92,共6页Polymer Materials Science & Engineering

基　　金：武汉工程大学科学研究基金(K201809);生物无机化学与药物湖北省重点实验室开放基金(BCMM2020003)。

摘　　要：利用两步法合成了聚丙烯酰胺(PAM)/聚甲基丙烯酸(2-甲基氨基)乙酯(PDMAEMA)双网络水凝胶,第一网络为锂藻土(Laponite)物理交联的PAM纳米复合水凝胶,第二网络为化学交联剂N,N-亚甲基双丙烯酰胺(BIS)交联PD-MAEMA。研究了2种网络相对含量、纳米黏土Laponite用量、化学交联剂BIS用量对水凝胶强度和pH响应性的影响。研究结果表明,PAM/PDMAEMA双网络水凝胶具有高强度,改变单体AM和DMAEMA的配比、交联剂的用量,其拉伸强度在36~91.9kPa范围内可调。PAM/PDMAEMA双网络水凝胶还具有灵敏的pH刺激响应性,在pH=4时双网络水凝胶溶胀度急剧下降。PAM/PDMAEMA double network hydrogels were prepared by two-step method.The first network was polyacrylamide(PAM)nanocomposite hydrogels physically cross-linked with laponite.The second network was poly(2-methylamino)ethyl methacrylate(PDMAEMA)chemically cross-linked with BIS.The effects of relative content of two networks,amounts of laponite and BIS on hydrogel strength and pH sensitivity were investigated.The results show that PAM/PDMAEMA double network hydrogels have a high tensile strength which can be adjusted in the range of 36~91.9 kPa by changing the monomer ratios of AM and DMAEMA or the amount of crosslinking agent.The double network hydrogels also exhibit pH sensitivity and the equilibrium swelling ratio sharply decreases at pH=4.

关 键 词：双网络 高强度 甲基丙烯酸(2-甲基氨基)乙酯 锂藻土 PH响应 

分 类 号：TQ427.26[化学工程]