GG-g-PAA/LOESS复合高吸水性树脂的制备与性能  

Preparation and Properties of GG-g-PAA/LOESS Superabsorbent Composites

作　　者：冯恩科[1] 王辉[1] 李佳佳[1] 马国富[1,2] 

机构地区：[1]西北师范大学生态环境相关高分子材料教育部重点实验室,甘肃兰州730070 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《精细化工》2013年第12期1344-1348,1365,共6页Fine Chemicals

基　　金：国家自然科学基金(21164009);教育部长江学者和创新团队发展计划(IRT1177)~~

摘　　要：以瓜尔胶(GG)、丙烯酸(AA)和黄土(LOESS)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,采用水溶液聚合法制备了瓜尔胶接枝聚丙烯酸/黄土(GG-g-PAA/LOESS)复合高吸水性树脂。采用FTIR和SEM对其结构进行了表征,研究了LOESS的添加量对复合高吸水性树脂的溶胀能力和溶胀动力学的影响,考察了复合高吸水性树脂的保水性能、反复溶胀性以及在不同pH溶液中的吸水性能。结果表明,瓜尔胶、丙烯酸和LOESS发生了接枝共聚,体系中引入LOESS能够显著提高复合高吸水性树脂的吸水性能。当LOESS的质量分数为2%时,该树脂最高吸水倍率可达602 g/g,室温下6 d后,其保水率仍达28%,5次反复溶胀,吸水倍率仍能保持初始时的49%。此外,该复合高吸水性树脂还表现出优异的pH稳定性。Novel guar gum-g-poly（acrylic acid）/loess（GG-g-PAA/LOESS） superabsorbent composites were prepared by graft polymerization in aqueous solution using guar gum （GG）, acrylic acid （AA）, loess as raw materials, ammonium persulfate （APS） as initiator and N, N-methylenebisacrylamide （MBA） as crosslinker. The structure of the superabsorbent composites was characterized by means of FTIR and SEM. The effect of loess content on swelling capabilities and swelling kinetics of the superabsorbent composites was studied. Water-retention properties at various temperatures, reswelling capabilities and water absorbency at various pH solutions of superabsorbent composites were also investigated. The results indicate that GG and LOESS participated in graft polymerization reaction with AA. The introduced LOESS could remarkably enhance the capability of water absorption and the superabsorbent composite containing 2% LOESS had the best absorption of 602 g/g. The water retention for the superabsorbent composite was still more than 28% after 6 d at room temperature and after reswelling 5 times, and water absorbency can maintain 49% of the initial time. In addition, the superabsorbent composites showed excellent pH-stability in various pH solutions.

关 键 词：瓜尔胶 黄土 高吸水性树脂 吸水性能 功能材料 

分 类 号：TQ322.91[化学工程—合成树脂塑料工业]