纳米级两性聚丙烯酰胺的反相微乳液聚合

Preparation of Amphoteric Nano-Polyacrylamide by Inverse Microemulsion Copolymerization

以Span80和Tween60为复合乳化剂、异辛烷为连续相、K2S2O8-NaHSO3为引发剂,用正交设计实验对两性聚丙烯酰胺反相微乳液聚合的条件进行优化选择,得出正交实验的最佳聚合条件,即反应温度50℃,反应时间3h,油水体积比为0.8∶1,引发剂质量百分数为1%(相对于水溶液质量),氧化剂与还原剂的质量比为1∶1.5,单体水溶液的pH值为4,在此条件下合成的两性聚丙烯酰胺体系中各种粒子的平均粒径为97.00nm,分子量达25.82万。并用红外光谱(FTIR)对其进行表征,表明两性聚丙烯酰胺共聚物的成功合成。

The inverse microemulsion polymerization of amphoteric polyacrylamide by means of orthogonal experimental design was studied, using Span80 and Tween60 as a complex emulsifier, the isooctane as the dispersed phase, （K2S2O8/NaHSO3） as an initiated redox system, and the optimum conditions of orthogonal experiment had been got. The result show that under the optimum conditions of reaction temperature 50 ℃, reaction time 3 h, the volume of oil-water ratio 0.8∶1, the concentration of initiator 1%, initiator ratio 1∶1.5, molecular weight of 25.82×104 of 97 nm particles was synthesized and the structure of the amphoteric polyacrylamide was identified by Fourier transform infrared spectroscopy（FT-IR）.