双亲性共聚物P(St/VBT-co-MA)自组装胶束的制备及其乳化性能  

Emulsifying Performance of Self-assembled Micelles Based on Amphiphilic Copolymer P(St/VBT-co-MA)

作　　者：谢亚珍 刘敬成[1] 胡琼[1] 刘仁[1] 刘晓亚[1] 张胜文[1] 

机构地区：[1]江南大学化学与材料工程学院,食品胶体与生物技术教育部重点实验室,江苏无锡214122

出　　处：《功能高分子学报》2016年第2期200-206,共7页Journal of Functional Polymers

基　　金：江苏省自然基金-青年基金(BK20140160);江南大学自主科研-青年基金(JUSRP11514)

摘　　要：以1-(4-乙烯基苄基)胸腺嘧啶(VBT)、苯乙烯(St)、马来酸酐(MA)为共聚单体,采用自由基聚合法制备了双亲性共聚物P(St/VBT-co-MA)(PSVM)。PSVM在选择性溶剂N,N-二甲基甲酰胺(DMF)的水溶液中进行自组装可形成胶束。利用透射电镜(TEM)和动态激光光散射(DLS)表征了自组装胶束的形态和粒径分布。以该胶束作为颗粒乳化剂稳定白油-水体系形成乳液,研究了PSVM胶束浓度、pH、盐浓度等对其乳化性能的影响,并用光学显微镜(OM)表征了其乳液形态。结果表明:通过自由基聚合的方法成功合成了双亲共聚物PSVM,其自组装形成粒径分布均匀的球形胶束;该胶束具有优异的乳化效率,其乳液长期稳定且具有pH响应性及强耐盐性,静置四个月后,乳液仍具有良好的乳化效果且乳液层高度基本不变。Using 1-（4-vinylbenzyl）thymine（VBT）,styrene（St）,and maleic anhydride（MA）as comonomers,amphiphilic copolymer P（St/VBT-co-MA）（PSVM） was synthesized by free radical copolymerization,which could be self-assembled into micelles in the selective solvent N,Ndimethylformamide（DMF）-H2O.The morphologies,sizes,and size distributions of the micelles were characterized by Transmission Electron Microscopy（TEM）and Dynamic Light Scattering（DLS）.Using the micelles as particle emulsifiers to stabilize white oil-water system to form emulsions,the influence of micelle concentration,pH value,salt concentration on the emulsifying properties were studied and the morphologies of emulsions were analyzed by Optical Microscope（OM）.Results showed that PSVM was successfully synthesized by free radical polymerization,which could be self-assembled into spherical micelles with uniform sizes.PSVM micelles had excellent emulsifying efficiency.The emulsions were longterm stable and pH-dependent and showed strong salt resistance.After four months,the emulsions still had excellent emulsifying effect and the height of the emulsions layer remained basically unchanged.

关 键 词：双亲性共聚物 自组装 PSVM胶束 乳化性能 

分 类 号：O63[理学—高分子化学]