反相悬浮聚合法制备耐盐高吸水树脂的研究  

Study on Preparation and Properties of Salt-tolerant Superabsorbent Resin through Inverse-suspension Polymerization

作　　者：陈日清[1] 蒋煜[1] 储富祥[1] 朱永年[1] 金立维[1] 林明涛[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,江苏南京210042

出　　处：《林产化学与工业》2006年第1期28-32,共5页Chemistry and Industry of Forest Products

基　　金：国家863基金资助项目(2001AA242043);国家十五攻关基金资助项目(2002BA517A-09-05)

摘　　要：采用反相悬浮聚合法,以N,N′-亚甲基双丙烯酰胺为交联剂,过硫酸铵为引发剂,乙二胺四乙酸(EDTA)为螯合添加剂,用部分中和的丙烯酸为单体,制成交联型耐盐高吸水树脂,吸水率和吸盐水率分别达到670和170 g/g以上。研究了表面活性剂、交联剂、螯合剂以及中和度等对吸水率和吸盐水率的影响。结果表明,以混合非离子-阴离子齐聚物作为表面活性剂及改性剂,可获得良好的分散效果;EDTA的引入显著提高了树脂的吸盐水率;通过优化交联剂和引发剂用量,同时选择适宜的中和度,可得到综合性能优良的高吸水树脂。Superabsorbent resins with performance of good salt-tolerance were synthesized by inverse-suspension polymerization of acrylic acid in the presence of a crosslinking agent（ N, N＇-methylene bisacrylamide）, an initiator （ammonium persulfate） and a chelant （ethylenediamine tetraacetic acid, EDTA）. Influences of the amounts of crosslinking agent, chelant and initiator as well as degree of neutralization of acrylic acid on the absorption capacities toward water and salt solution were studied. It was found that the introduction of chelant EDTA promoted significantly absorption toward salt solution. It was also demonstrated that amounts of crosslinking agent, initiator and the degree of neutralization of acrylic acid influenced to a certain extent the absorption of resin toward 0.9% NaC1 solution. Stable suspension could be obtained by using mixed non-ionic/anionic oligomers as surfactants. The resulted resins showed absorption capacities of more than 670 g/g toward water and 170 g/g toward 0.9% NaCl solution respectively.

关 键 词：耐盐性 高吸水树脂 反相悬浮聚合 

分 类 号：TQ322[化学工程—合成树脂塑料工业]