摘要
淀粉接枝高吸水性树脂是一种带有吸水基团的网状结构高分子聚合物,是近年来国内外广泛开发研究的新型功能材料之一。以玉米淀粉、丙烯酸(AA)和丙烯酰胺(AM)为原料,N,N’-亚甲基双丙烯酰胺(MBA)为交联剂,环己烷为连续相,过硫酸钾(KPS)作为引发剂,在氮气保护下采用反相悬浮聚合法合成高吸水性树脂微球。红外光谱法(FTIR)表明产物为淀粉接枝AA/AM高吸水树脂。通过正交试验探讨了各种因素对树脂吸液率的影响。结果表明较适宜工艺条件是:玉米淀粉用量为10%,引发剂用量为0.2%,交联剂用量为0.3%,分散剂用量为2%。通过显微镜(SEM,TEM)和热重(TGA)探讨了接枝高吸水树脂的外形和热稳定性。结果表明树脂微球粒径大多分布在100μm上下,且热稳定性良好。同时探讨了温度对淀粉接枝高吸水树脂保水能力的影响,结果表明高吸水树脂有良好的保水性能。
Starch grafted high water absorption resin is a new type of polymer with hydrophilic group,which is widely followed as one of the new functional materials at home and abroad in recent years. Superabsorbent polymer spheres were synthesized by inverse suspension polymerization under N2 atmosphere,using starch,acrylic acid（ AA） and acrylamide（ AM） as raw materials,N,N＇-methylenebisacrylamide as cross-linking agent,cyclohexane as continuous phase,potassium persulfate as initiator. The chemical structure of synthetic copolymer was confirmed by FTIR,which ws inferred that the product was the starch grafted poly（ AA / AM） superabsorbent resin. The process conditions influence on rate of water absorption resin were investigated through the orthogonal experiment.The results showed that the suitable process conditions are： the amount of corn starch was 10%,causing agent dosage is 0. 2%,amount of crosslinking agent was 0. 3%,scattered dosage is 2%. The morphology and thermal stability of the grafted resin was investigated by means of microscope（ SEM,TEM） and thermograrimetric analysis（ TGA）. The results showed that the particle size of the superabsorbent polymer was about ten um and they had excellent thermal stability. The effect of various temperature on the ability of holding water for copolymer was also investigated. The results showed that the product has excellent ability of holding water.
出处
《科学技术与工程》
北大核心
2016年第16期238-242,共5页
Science Technology and Engineering
基金
长江大学工程技术学院科研基金(14j0602)资助
关键词
淀粉
接枝
高吸水性树脂
吸水率
starch
graft
superabsorbent polymer
water-absorption
