反相悬浮共聚法制备淀粉接枝丙烯酰胺絮凝剂及其在水处理中的应用  

Preparation of a Starch Grafting Acrylamide Flocculant by Inverse Suspension Copolymerization and its Application in Water Treatment

作　　者：李海明[1] 周建国[1] 刘志军[1] 

机构地区：[1]天津城市建设学院材料科学与工程系,天津300384

出　　处：《山西大学学报（自然科学版）》2008年第4期565-569,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：国家建设部项目(05-K4-31);天津市科技计划项目(08ZCKFSHO1100)

摘　　要：以环己烷为连续相,span-60为分散剂,硝酸铈铵/过硫酸钾(CAN/KPS)为复合引发剂,通过反相悬浮共聚法制备淀粉接枝丙烯酰胺絮凝剂.考察了引发剂用量、反应时间、单体用量、分散剂用量及反应温度等因素对接枝反应中单体转化率和接枝率的影响;并将该接枝共聚物用于对高浊度水的絮凝实验.结果显示接枝反应的最佳反应条件为:淀粉用量10 g,丙烯酰胺用量5 g,分散剂用量3 g,引发剂用量0.3 g(CAN/KPS=0.5,摩尔比),反应温度70℃,反应时间2 h;絮凝实验表明该淀粉接枝絮凝剂对高浊度水具有良好的絮凝效果.A starch grafting acrylamide flocculant was synthesized by inverse suspension copolymerization with cyclohexane as continuous phase, Span-60 as dispersing agent, Ceric ammonium nitrate/potassium persulfate （CAN/KPS） as complex initiation system. The factors affecting the monomer conversion ratio and starch grafting ratio,such as initiator quality,dispersing agent dosage,amounts of monomers,reaction time and reaction temperature were investigated. The obtained copolymers were used for flocculation experiment to high turbidity water. The optimal preparation condition was ：starch quality 10 g,acrylamide quality 5 g,dispersing agent dosage 3 g,initiator dosage 0.3 g（CAN/KPS= 0. 5,the molar ratio） ,reaction temperature at 70 ℃ and reaction time for 2 h. The flocculation experiment indicated that these starch grafting floceulants had good flocculation effect to the high turbidity water.

关 键 词：反相悬浮 复合引发体系 淀粉 絮凝剂 

分 类 号：O636[理学—高分子化学]