双亲性无规共聚物P（VM-co-AMPS）的自组装及其性能

摘要

以2-丙烯酰胺基-2-甲基丙磺酸（AMPS）和苯乙烯类光敏单体7-（4-乙烯基苄氧基）-4-甲基香豆素（VM）为共聚单体,采用自由基聚合法制备了光敏性双亲共聚物P（VM-co-AMPS）。P（VM-co-AMPS）在溶剂水中自组装胶束化,用原子力显微镜（AFM）表征了自组装胶体粒子的形态、粒径及其分布。紫外光照使胶体粒子中香豆素基元发生光二聚反应,用紫外-可见光分光光度计（UV-Vis）跟踪其光二聚交联过程,用光学显微镜考察了胶体粒子的乳化性能。结果表明：胶体粒子具有较好的紫外吸收性能和较好的乳化性能。该胶束制备工艺简单,条件温和,避免了溶剂的使用。%A photosensitive amphiphilic random copolymer P（VM-co-AMPS） was synthesized from 2-acrylanmido-2-methyl propane sulfonic acid（AMPS） and photosensitive monomer 7-（4-vinylbenzyloxy）-4-methyl coumarin（VM） by free radical copolymerization.P（VM-co-AMPS） self-assembled into colloid particles in the aqueous solution.The morphologies,sizes,and size distributions of the colloid particles were characterized by atomic force microscopy（AFM）.The coumarin groups in the P（VM-co-AMPS） colloidal particles could be photodimerized and its photodimerization process was monitored using UV-Vis spectroscopy.Eventually,the P（VM-co-AMPS） colloidal particles were used as particulate emulsifiers to stabilize the toluene-in-water emulsions,observed by optical microscope.Results showed that the colloid particles possessed good UV absorption and emulsification properties.Preparation technology of self-assembled colloidal particles was simple and mild,avoiding the use of organic solvents.