N-异丙基丙烯酰胺/丙烯酸钠水凝胶的制备及正渗透应用  

Preparation of N-isopropyl acrylamide/sodium acrylate hydrogel and application in direct penetration

作　　者：乐妍 董爽爽 贠延滨[1] Le Yan;Dong Shuangshuang;Yun Yanbin(College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083)

机构地区：[1]北京林业大学环境科学与工程学院,北京100083

出　　处：《化工新型材料》2021年第5期237-240,244,共5页New Chemical Materials

基　　金：国家重点研发计划(2018YFB0604302-03)。

摘　　要：近年来,正渗透(FO)膜分离技术得到各研究领域的关注,而汲取剂的选取是研究关键点,以N-异丙基丙烯酰胺(NIPAM)和丙烯酸钠(SA)为水凝胶聚合单体,利用引发剂过硫酸铵(APS)和交联剂N,N-亚甲基双(丙烯酰胺)(MBA)对单体进行物理交联,通过改变各组分浓度制备出不同的聚N-异丙基丙烯酰胺-丙烯酸钠水凝胶(NIPAM/SA),并分析讨论其表面形貌和溶胀性能。结果表明:水凝胶制备剂最佳配比为46.5%NIPAM+46.5%SA+3%MBA+2%APS。将最佳配比的水凝胶汲取剂与3种高渗透压的无机盐汲取剂和水凝胶汲取剂进行正渗透测试,结果表明水凝胶汲取剂的返盐量为零,水凝胶汲取剂完全可以克服液态汲取剂带来的粒子返渗的困扰,在正渗透领域有正面作用。In recent years,penetration(FO)get all the attention in the research field of the membrane separation technology,and selection of absorbing agent is the key point.N-isopropyl acrylamide(NIPAM)and sodium acrylate(SA)monomer were used,and using initiator ammonium persulfate(APS)and crosslinking agent N,N-methylene double(acrylamide)(MBA)to physical crosslinking the monomers,NIPAM/SA hydrogel was prepared by changing the concentration of different components.And the swelling performance and surface morphology of the hydrogel were analyzed.It was concluded that optimum proportion of the agent for hydrogel preparation as the following:46.5%NIPAM+46.5 wt.%SA+3 wt.%MBA+2 wt.%APS.The results of the positive osmosis test of the best ratio of hydrogel absorbent with three inorganic salt absorbent and hydrogel absorbent with high osmotic pressure shown that the return salt of hydrogel absorbent was zero,which can completely overcome the problem of particle regurgitation caused by liquid absorbent,and had a positive effect in the field of positive osmosis.

关 键 词：水凝胶 溶胀性 正渗透 返盐量 

分 类 号：TQ427.26[化学工程]