空心玻璃微珠对聚丙烯酸水凝胶溶胀性能的影响  

Effects of Hollow Glass Microspheres on Swelling Properties of Polyacrylic Acid Hydrogels

作　　者：杨珊 段晓梅 Yang Shan;Duan Xiaomei(Shaanxi Province Engineering Research Center of Coal Conversion Alcohol,College of Chemistry and Materials,Weinan Normal University,Weinan 714099,China)

机构地区：[1]渭南师范学院化学与材料学院,陕西省煤基低碳醇转化工程研究中心,陕西渭南714099

出　　处：《工程塑料应用》2020年第5期11-16,共6页Engineering Plastics Application

基　　金：陕西省自然科学基金项目(2017JM2012);渭南师范学院自然科学类研究项目(18ZRRC12)。

摘　　要：为了研究空心玻璃微珠(HGM)的加入对合成聚丙烯酸(PAA)水凝胶的吸水溶胀性、耐盐性及pH敏感性的影响,以丙烯酸(AA)为单体、聚乙二醇为有机致孔剂、HGM为无机致孔剂、过硫酸铵为引发剂、N,N-亚甲基双丙烯酰胺为交联剂,通过自由基溶液聚合制备了5种不同HGM投料量的PAA水凝胶,并对其结构、热稳定性、表面形貌以及其在纯水、生理盐水和pH缓冲液中的溶胀行为进行了表征。结果表明,HGM的加入并不影响PAA水凝胶的化学组成和热稳定性,但有利于凝胶致孔;适量HGM的加入有助于大幅提高PAA水凝胶的吸水溶胀性、耐盐性和pH敏感性;当HGM的投料量为单体AA质量的10%时,PAA水凝胶的孔结构最丰富,其吸水平衡溶胀比可达345 g/g,吸盐水平衡溶胀比为47 g/g,pH敏感性在5种水凝胶中最佳。In order to study the effects of hollow glass microspheres (HGM) on the water swelling property,salt resistance and pH sensitivity of synthetic polymer hydrogels,5 kinds of polyacrylic acid (PAA) hydrogels with different HGM feeding quantities were prepared by free radical solution polymerization with acrylic acid (AA) as monomer,polyethylene glycol as organic pore-forming agent,HGM as inorganic pore-forming agent,ammonium persulfate as initiator,and N,N-methylene diacrylamide as crosslinking agent.The structure,thermal stability,and surface morphology of PAA hydrogels,and their swelling behaviors in pure water,saline and pH buffer solutions were tested,respectively.The results show that,although the addition of HGM does not affect the chemical composition and thermal stability of PAA hydrogels,it is benefit for pore-forming during the preparation of hydrogels.Adding appropriate amount of HGM can greatly improve the water swelling property,salt resistance and pH sensitivity of PAA hydrogels.When the feeding quantity of HGM is 10 wt% of monomer AA,the PAA hydrogel has the most abundant pores,and its equilibrium swelling ratios in water and saline are 345 g/g and 47 g/g respectively,and the pH sensitivity is the best in the 5 kinds of PAA hydrogels.

关 键 词：多孔水凝胶 聚丙烯酸 空心玻璃微珠 溶胀性能 PH敏感性 

分 类 号：O648.17[理学—物理化学]