煤油介质中制备淀粉基阳离子絮凝剂

Inverse emulsion polymerization of cationic starch flocculant in kerosene media

以淀粉、丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)为原料,采用氧化还原引发体系,以煤油作为连续相,通过反相乳液聚合法制备阳离子聚丙烯酰胺絮凝剂。考察了乳化剂种类和用量、引发剂浓度、反应时间及反应温度等因素对单体转化率、聚合物特性黏数及接枝率、接枝效率的影响,以及阳离子单体用量对聚合物特性黏数的影响。确定最佳工艺条件为:乳化剂质量分数6%,两种单体共占水相质量分数45%,阳离子单体占总单体的质量分数为30%,引发温度45℃,引发时间4h。在此条件下,单体转化率可达97.82%,特性黏数为340.21mL/g,接枝效率为97.93%。

cationic polyacrylamide flocculant was prepared by inverse emulsion polymerization using redox initiate system and kerosene as the continuous phase with starch,acrylamide（AM）,dimethyldiallyl ammonium chloride（DMDAAC）as raw materials.The optimized condition is：the mass fraction of emulsifier 6%,aqueous monomer concentration 45%,cationic monomer 30% of the total monomer,initiation temperature 45℃,leading time 4h.At this condition,monomer conversion rate can reach to 97.82%,the intrinsic viscosity is 340.21mL/g,and grafting efficiency is 97.93%.