pH敏感P(MAA-co-BMA)水凝胶的溶胀行为  

Swelling behavior of pH sensitive P(MAA-co-BMA) hydrogels

作　　者：杨珊[1] 

机构地区：[1]渭南师范学院化学与材料学院,陕西渭南714099

出　　处：《化工科技》2017年第1期28-31,共4页Science & Technology in Chemical Industry

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)和甲基丙烯酸丁酯(BMA)为共聚单体、N,N-亚甲基双丙烯酰胺为交联剂、偶氮二异丁腈为引发剂,用溶液聚合法合成P(MAA-co-BMA)水凝胶,研究其吸水溶胀性和pH敏感性。结果表明,BMA投料为摩尔分数5%的共聚水凝胶在211℃以下处于高弹态,其吸水溶胀比可达52;该凝胶烘干和冻干处理后的pH敏感性都很好,即平衡溶胀比随着pH增大而增大;而冻干凝胶因具有规律的大孔结构,在不同pH溶液中的平衡溶胀比差异更大。The poly（methacrylic acid-co-butyl methacrylate） [P （MAA-co-BMA） ] hydrogels were syn- thesized by solution polymerization with methacrylic acid （MAA） and butyl methacrylate （BMA） as monomers, N, N-methylenebis acrylamide （BIS） as crosslinking agent, and azobisisobutyronitrile （AIBN） as initiator.The swelling behaviors of hydrogels in water and different pH solutions were in- vestigated.The results showed that, the hydrogel with 5 % BMA in feed ratio was in high elastic state below 211℃ ,and the swelling ratio in water can reach 52.Both the freeze-dried and the ovendried hy- drogels had good pH sensitivity,which means the equilibrium swelling ratio of them can increase with the pH increasing,and the equilibrium swelling ratio of freeze-dried hydrogel had more obvious differ- ence in different pH solution as it has relative uniform macropores.

关 键 词：水凝胶 聚(甲基丙烯酸-甲基丙烯酸正丁酯) 溶胀行为 PH响应性 

分 类 号：O648.17[理学—物理化学] TQ325.7[理学—化学]