瓜尔胶-g-聚(丙烯酸钠-co-苯乙烯)/海泡石复合高吸水性树脂的制备及溶胀行为  

Synthesis and swelling properties of guar gum-gpoly(sodium acrylate-co-styrene)/sepiolite superabsorbent composite

作　　者：施小宁[1,2] 王文波[1] 王爱勤[1] 

机构地区：[1]中国科学院兰州化学物理研究所,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《化工学报》2011年第3期864-869,共6页CIESC Journal

基　　金：国家高技术研究发展计划项目(2006AA03Z0454);中国科学院'西部行动'计划项目(KGCX2-YW-501)~~

摘　　要：以瓜尔胶(GG)、部分中和丙烯酸(NaA)、苯乙烯(St)和海泡石(ST)为原料,过硫酸铵(APS)为引发剂,N,N′-亚甲基双丙烯酰胺(MBA)为交联剂,在水溶液中通过接枝共聚反应合成了瓜尔胶-g-聚(丙烯酸钠-co-苯乙烯)/海泡石(GG-g-poly(NaA-co-St)/ST)复合高吸水性树脂。考察了St和ST用量对复合高吸水性树脂溶胀能力和溶胀速率的影响。当CSt=24.3 mmol.L-1、ST为10%(质量)时,树脂的溶胀能力和溶胀速率最大。研究了树脂在不同价态阳离子盐(NaCl、CaCl2和AlCl3)和不同pH值溶液中的溶胀行为。实验结果表明,在GG-g-poly(NaA)凝胶中引入适量的St和ST可以有效地改善树脂的网络结构。相对于空白样品,复合高吸水性树脂在蒸馏水中的溶胀能力和初始溶胀速率分别提高46.1%和62.7%。Novel guar gum-g-poly（sodium acrylate-co-styrene）/sepiolite（GG-g-poly（NaA-co-St）/ST）superabsorbent composites were synthesized by grafted copolymerization in aqueous solution using ammonium persulfate（APS） as initiator and N,N′-methylenebisacrylamide（MBA）as crosslinker.The effect of St and ST contents in superabsorbent composites on swelling capacity and swelling rate was investigated and the results showed that the optimum St and ST contents were 24.3 mmol·L-1 and 10%（mass）,respectively.The swelling behavior of the superabsorbent composites in solutions of different salts（NaCl,CaCl2,AlCl3）and pH values was also studied.The experiment results indicated that the polymeric network structure of GG-g-poly（NaA）could be improved by introducing a proper amount of St and ST,and then the swelling capacity and swelling rate of the superabsorbent composites increased by 46.1% and 62.7%,respectively.

关 键 词：瓜尔胶 苯乙烯 海泡石 复合高吸水性树脂 溶胀行为 

分 类 号：TQ317.3[化学工程—高聚物工业]