摘要
为掌握在氮气保护条件下,以N,N′-亚甲基双丙烯酰胺为交联剂,过硫酸铵引发糯小麦淀粉与丙烯酸接枝共聚制备的糯小麦淀粉高吸水性树脂的结构及性能。采用红外光谱和扫描电子显微镜法分析了糯小麦淀粉高吸水性树脂的结构,并对其吸水倍率、吸盐水倍率、保水能力、热稳定性、耐酸碱性、贮藏稳定性及反复使用性等进行了系统分析。结果表明:高吸水性树脂为糯小麦淀粉与丙烯酸的接枝共聚物;糯小麦淀粉高吸水性树脂的吸蒸馏水倍率和吸盐水倍率分别达到1169.6 g.g-1和88.6 g.g-1,耐盐性较差;在30、40和60℃条件下,糯小麦淀粉高吸水性树脂的保水性明显优于科翰98商品保水剂。糯小麦淀粉高吸水性树脂的热稳定性、贮存稳定性和反复使用性能较强,但其耐酸碱能力较弱。
A super- absorbent resin was prepared by using waxy wheat starch and acrylic acid with the protection of nitrogen, using N, N＇- methylene - bisacrylamide as cross - linking agent, and ammonium persulfate as initiator. The structure of the waxy wheat starch superabsorbent resin was analyzed by FTIR and SEM, and its distilled water absorbency, salt water absorbency, water retaining capacity, heat stability, resistance to acidity or alkalescence, reserve stability, repeatuse capability were also determined. Results show the super absorbent resin is a graft copolymer by waxy wheat starch and acrylic acid;the distilled water absorbency and salt water absorbency of the absorbent resin reaches 1 169.6 g·g^-1 and 88.6 g·g^-1, respectively, but the resistance capability to salt is not good. In the conditions of 30, 40, and 60℃, the waxy wheat starch super- absorbent resin displays better water retaining capacity than Kehan 98 commodity SAR. The heat stabihty, reserve stability and repeat- use capability of the waxy wheat starch super- absorbent resin are rather strong, however the resistance to acidity or alkalescence is faintish.
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2009年第4期23-27,共5页
Journal of the Chinese Cereals and Oils Association
基金
陕西省科技攻关项目(2005K01-G3)
关键词
糯小麦淀粉
高吸水性树脂
结构
性能
waxy wheat starch, super- absorbent resin, structure, capability
