pH敏感P(MAA-co-AM)水凝胶的制备及溶胀行为研究  

Preparation and swelling behavior of pH sensitive P(MAA-co-AM) hydrogel

作　　者：杨珊[1] 尹艳丽[1] 

机构地区：[1]渭南师范学院化学与材料学院,渭南714099

出　　处：《化工新型材料》2017年第1期212-215,共4页New Chemical Materials

基　　金：陕西省军民融合研究基金项目(16JMR08);渭南市科技计划项目(2016KYJ-3-4);渭南师范学院科研计划项目(15YKF004)

摘　　要：以甲基丙烯酸(MAA)、丙烯酰胺(AM)为单体,N,N-亚甲基双丙烯酰胺作交联剂(BIS),过硫酸铵为引发剂(APS),用溶液聚合的方法合成水凝胶P(MAA-co-AM),研究了单体配比及干燥方式对水凝胶表面形貌以及对水、不同pH溶液及盐溶液的溶胀行为的影响。结果表明,P(MAA-co-AM)16凝胶(MAA/AM摩尔比为16∶100)冻干处理后具有均匀的大孔;与PAM和PMAA凝胶相比,P(MAA-co-AM)16凝胶的吸水溶胀速率快(1h溶胀平衡)、平衡溶胀比大(ESR=250)、pH体积响应变化大(pH为4.01、6.86、9.18时的ESR分别为20、60、141),吸盐率比PMAA有所提高。The poly（methacrylic acid-co-acrylamide）[P（MAA-co-AM）]hydrogels were synthesized by solution polymerization with methacrylic acid（MAA）and acrylamide（AM）as monomers,N,N-methylenebis acrylamide（BIS）as crosslinking agent,and ammonium persulfate（APS）as initiator.The effects of feed ratios of monomer and drying methods on the surface morphology and swelling behavior in water,different pH solutions and salt solution were investigated.The results showed that,the freeze-dried P（MAA-co-AM）16hydrogel with MAA/AM molar ratio of 16∶100had relative uniform macrospores.Compared with PAM and PMAA hydrogels,P（MAA-co-AM）16hydrogel had rapid swelling rate（reached swelling equilibrium in 1h）,large equilibrium swelling ratio（ESR=250）,remarkable pH volume response changes（ESR at pH 4.01,6.86 and 9.18 were 20,60,and 141respectively）,and increased salt absorption than PMAA.

关 键 词：水凝胶 聚(甲基丙烯酸-丙烯酰胺) 溶胀行为 PH响应性 

分 类 号：TQ316.333[化学工程—高聚物工业]