温度和pH双重敏感性P（DEA-co-DMAEMA）/Na2WO4水凝胶的合成与表征  

Synthesis and Characterization of Temperature-and pH-sensitive P（DEA-co-DMAEMA）/Na2WO4 Hydrogels

作　　者：马建军 王丰[1] 徐世美 MA Jian-jun;WANG Feng;XU Shi-mei(Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China;College of Chemistry, Sichuan University, Chengdu 610065, Sichuan, China)

机构地区：[1]新疆大学化学化工学院石油天然气精细化工教育部自治区重点实验室,新疆乌鲁木齐830046 [2]四川大学化学学院,四川成都610065

出　　处：《精细化工》2018年第7期1116-1120,共5页Fine Chemicals

基　　金：国家自然科学基金资助项目(21366031)~~

摘　　要：以N,N-二乙基丙烯酰胺（DEA）和甲基丙烯酸二甲氨基乙酯（DMAEMA）为单体,N,N-亚甲基双丙烯酰胺（BIS）为交联剂,采用一锅法制备了温度和p H双重响应性P（DEA-co-DMAEMA）/Na_2WO_4水凝胶。考察了Na_2WO_4的引入对水凝胶的结构、温度和p H响应性能的影响。结果表明：复合水凝胶中除了化学交联外,还存在Na_2WO_4与聚合物间由于氢键和配位作用产生的物理交联;复合水凝胶的低临界相转变温度（LCST）随着Na_2WO_4质量分数的增加呈线性降低,当Na_2WO_4质量分数从0增至3%时,LCST由41.6℃降至34.4℃;复合水凝胶表现出双重p H响应性,即在酸性条件下溶胀,中性条件下溶胀率减小,碱性条件下溶胀率又升高。A series of temperature-and p H-sensitive P（DEA-co-DMAEMA）/Na_2WO_4 hydrogels were synthesized by one pot method with N,N-diethylacrylamide（DEA） and dimethylaminoethyl methacrylate（DMAEMA） as monomers, N,N-methylene bisacrylamide（BIS） as crosslinking agent, respectively. The effect of Na_2WO_4 content on the structure, temperature and p H dual-responsive behavior of hydrogel was investigated. The results showed that besides chemical cross-linking in composite hydrogel, there was a physical cross-linking caused by hydrogen bonding and coordination between Na_2WO_4 and polymer. Furthermore, low critical solution temperature（LCST） of composite hydrogel decreased linearly with increasing of Na_2WO_4 content. When the Na_2WO_4 content increased from 0 to 3%, the LCST decreased from 41.6 ℃ to 34.4 ℃. In addition, the composite hydrogel exhibit double p H-responsive properties, i.e., swelling ratio of composite hydrogel increased under acidic condition, then it decreased under neutral condition, but increased again under alkaline condition.

关 键 词：水凝胶 温敏性 PH响应性 Na2WO4 功能材料 

分 类 号：O633[理学—高分子化学]