摘要
通过对淀粉丙烯腈接枝共聚物 (SPAN)皂化制备吸水剂HSPAN的研究表明 :HSPAN为水不溶性凝胶 ,但具有很强的吸水能力 .以氢氧化钾皂化 ,酸作沉淀剂 ,经洗涤、分散和干燥制备HSPAN的工艺路线较为理想 .皂化工艺条件在用碱量为SPAN中接枝链部分摩尔数的 1.1倍、皂化温度 95°C以上、皂化时间大于 3h ,且HSPAN的平板干燥温度在 70°C时最好 .当SPAN接枝百分率在 70 %左右时 ,制得的HSPAN吸水率最高 .
Studies on the Preparation Technology of Water absorbent (HSPAN) by the Saponification of the graft Copolymer of Starch and Acrylonitrile (SPAN) showed that, HSPAN was a kind of gel which was insoluble in water but could absorb a great amount of water. The best technology for the preparation of HSPAN was that,after SPAN was saponified by potassium hydroxide, precipited by sulfuric acid, washed and dispersed in water again, HSPAN was obtained by drying it on a plate. Moreover, the best conditions were that,the quantity of potassium hydroxide used in saponification was 1.1 as much as the mole of polyacrylonitrile in SPAN, saponifying temperature over 95°C, reaction time more than 3 h and drying temperature at 70°C. In addition, the highest water absorbing capacity could be obtained from the SPAN in which grafted ratio was 70% or so.
出处
《无锡轻工大学学报（食品与生物技术）》
CSCD
北大核心
2001年第1期24-28,共5页
Journal of Wuxi University of Light Industry
基金
高等学校骨干教师资助
关键词
淀粉
丙烯腈
接枝共聚物
皂化
吸水剂
制备
starch
acrylonitrile
graft copolymer
saponification
water absorbent
