阳离子聚丙烯酰胺超声辅助反相乳液聚合工艺研究  

Study on process of ultrasound-assisted inverse emulsion copolymerization of cationic polyacrylamide

作　　者：欧阳明[1] 李海普[1] 李彬[1] 张莎莎[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《应用化工》2010年第12期1807-1811,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(50804055);湖南省自然科学基金项目(09JJ3100)

摘　　要：以丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为共聚单体,采用反相乳液聚合工艺制备阳离子型聚丙烯酰胺乳胶P(DMDAAC-AM),并引入超声波作用加强乳化效果。结果表明,超声辅助乳化可以细化液滴,提高稳定性。聚合工艺的优化结果为:引发剂K2S2O8用量为1.6‰,乳化剂用量为8%,亲水亲油平衡值(HLB)为7,单体质量分数为35%,油水质量比为1.1∶1.0,超声时间为4 min,阳离子度为15%,反应温度60℃,反应时间4 h,所得产物乳液稳定,相对分子量为3.53×106。FTIR和SDTA-TGA分析结果表明,产物为P(DMDAAC-AM),分解温度为382.83℃,具有良好的热稳定性。Cationic polyacrylamide P（DMDAAC-AM） was synthesized by inverse emulsion polymerization with acrylamide（AM） and diallyl dimethyl ammonium chloride（DMDAAC） as co-monomers enhanced by ultrasonic emulsification.The results show that fine droplets can be feasibly produced in the emulsion when treated with ultrasound,leading to a higher stability.The optimal reaction conditions were as follows：initiator K2S2O8 1.6 ‰,emulsifier 8%,hydrophile-lipophile balance number（HLB） 7,mass fraction of monomer 35 %,mass ratio of oil to water 1.1 ∶1.0,ultrasonic time 4 min,cationic degree 15%,reaction temperature 60 ℃,and reaction time 4 h.The copolymer with molecular weight of 3.53×106 was obtained and its composition,P（DMDAAC-AM）,was confirmed by a combination of FTIR and SDTA-TGA analysis.It was found that the copolymer prepared with the assistance of ultrasonic irradiation had a good thermal stability as indicated by the high decomposition temperature of 382.83 ℃.

关 键 词：超声乳化 反相乳液聚合 二甲基二烯丙基氯化铵 丙烯酰胺 阳离子聚丙烯酰胺 

分 类 号：TQ314.2[化学工程—高聚物工业]