作　　者： ; ; ; ;

机构地区： 仲恺农业技术学院化学化工学院化学与化工系

出　　处： 《化工新型材料》 2008年第3期36-38,共3页

摘　　要： 采用亚硫酸氢钠-过硫酸铵氧化还原引发体系,以水溶液聚合合成了凹凸棒-膨润土-聚丙烯酸钠三元复合吸水树脂(SAPC)。研究了复合粘土用量、粘土配比对聚合反应速率的影响,以及影响SAPC吸水速率的因素。结果表明,粘土会加快引发体系生成自由基的速率,但会降低链增长反应速率,膨润土对丙烯酸钠自由基聚合的阻碍作用比凹凸棒更明显。将膨润土和凹凸棒复合,可发挥两者间的协同作用,在保持高平衡吸水率的同时,提高吸水速率。最优SAPC吸水速率的组成为:m(凹凸棒)∶m(膨润土)=2∶1,交联剂用量为0.07%,氧化剂用量为0.8%,中和度为90%。 A superabsorbent（SAPC） was prepared from the complexes of attapulgite / bentonite/sodium acrylate （AANa） ,with ammonium persulfate and sodium hydrogen sulfite as initiator, N, N＇-methylene-bis-acylamide as crosslinking agent, by means of water solution copolymerization. The effect of complex content, quantity ratio of attapulgite to bentonite on the rate of polymerization, and the factors affecting absorbency velocity of SAPC were investigated. It was shown that, the speed of free-radical produced by initiators can be improved by clay. At the same time, clay can also impede free -radical polymerization, in which bentonite had greater effect than attapulgite. When attapulgite and bentonite were added at the same time, SAPC had higher water absorbency and absorbency velocity. The optimum condition in this experiment has been obtained with m（attapulgite） ： m（bentonite） = 2 ： 1,0. 07 % crosslinker amount, 0. 8 % ammonium persulfate, 90 neutralization of AA.

关 键 词： 高吸水性树脂 粘土 膨润土 凹凸棒

领　　域： [化学工程] [轻工技术与工程]