PDF全文下载:2011040361
张茂伟, 武玉民*
(青岛科技大学 化工学院,山东 青岛 266042)
摘要:以聚甲基丙烯酰氧乙基三甲基氯化铵(PDMC)为分散剂,以过硫酸铵/亚硫酸氢钠氧化/还原体系为引发剂,在硫酸铵水溶液中进行了淀粉与丙烯酰胺(AM)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)的接枝共聚反应。考察了阳离子单体含量、引发剂浓度、反应时间对接枝率的影响。红外光谱(IR)结果表明,淀粉与AM、DMC进行了接枝共聚反应。将制得的淀粉接枝阳离子聚丙烯酰胺(S-g-CPAM)水分散体系用于高岭土悬浊液模拟废水实验,结果表明,在阳离子度为10.0%,接枝率为221%时,絮凝性能最好,其最佳投加质量浓度为2.0 mg·L-1。
关键词:淀粉; 聚丙烯酰胺; 接枝; 絮凝剂
中图分类号: TQ 316.3 文献标志码: A
Study on Application of Aqueous Dispersion of Starch-grafted Cationic Polyacrylamide
ZHANG Mao-wei, WU Yu-min
(College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract:Graft copolymerization of starch with acrylamide(AM) and dimethylaminoethyl methacrylate methyl chloride (DMC) was carried out in aqueous ammonium sulfate(AS) in the presence of poly(dimethylaminoethyl methacrylate methyl chloride)(PDMC) as stabilizer and (NH4)2S2O8-NaHSO3 redox system as initiator. The effect of DMC content, initiator concentration and reaction time on grafting was studied. The graft copolymerization was proved by Infrared spectrum(IR). The starch-grafted cationic polyacrylamide(S-g-CPAM) was used as flocculant to treat Kaolin suspensions. It was found that the optimal cationic degree was 10.0%, the grafting was 221%, and the optimal dosage was 2.0 mg·L-1.
Key words:starch; polyacrylamide; graft; flocculant
收稿日期:2011-01-16
基金项目:国家自然科学基金项目(20876081);山东省教育厅科技计划项目(J08LC04).
作者简介:张茂伟(1986—),男,硕士研究生. *通信联系人.