两性离子聚丙烯酰胺的合成

Synthesis of Zwitterionic Polyacrylamide

合成了一种磺基甜菜碱型两性离子单体甲基丙烯酰氧乙基-N,N-二甲基-N-丁磺酸铵盐(DMBS),并与丙烯酰胺(AM)进行自由基共聚合。以过硫酸铵和亚硫酸氢钠氧化还原体系为引发剂,在氯化钠溶液中成功地合成了两性离子聚丙烯酰胺;采用红外光谱对聚合产物的结构进行了表征;考查了不同反应条件对共聚物特性黏数的影响。确定了较佳的聚合反应条件为:引发剂用量0.04%,总单体的质量分数20%,单体配比3%,反应温度20℃,反应时间8 h。

Methacryloyloxyethyl - N, N - dimethyl - N - methacryloyl oxyethyl - N - （4 - sulfobutyl） ammonium （DMBS） as a sulfobetaine zwitterionic monomer was synthesized and subjected to radical copolymefization with aerylamide （AM）. Zwitterionic polyaerylamide was synthesized sueeessfuUy in sodium chloride solution with the redox system of ammonium persulfate and sodium bisulfite the initiator. The structure of the poly- merization product was characterized with infrared spectra, and the effect of different reaction conditions on the intrinsic viscosity of the copolymer was studied. The preferable polymerization reaction condition was ： initiator amount 0.04%, total monomer mass fraction 20%, monomer ratio 3%, reaction temperature 20 ℃, and reaction time 8 h.