摘要
目的:采用种子聚合法将甲基丙烯酸缩水甘油酯(GMA)包覆在聚苯乙烯(PS)种子上,制备出纳米级、单分散的核-壳型PS/PGMA高分子微球。方法:考察了引发剂(过硫酸钾)、表面活性剂(十二烷基磺酸钠)、单体(GMA)的用量和PS种子微球粒径等条件对PS/PGMA纳米微球粒径的影响。采用透射电子显微镜(TEM)、红外光谱(IR)等手段对样品的结构及形貌进行了表征。结果:通过优化制备条件,可以实现对微球粒径的调控,IR测定显示制备的微球含有PGMA与PS的特征官能团,TEM可看出所制微球球形度较好,具有清晰的壳-核型结构。结论:该方法制得PS/PGMA微球表面富含环氧基,因此更易于表面改性,克服了单一PS微球不易改性的缺点。
Objective： To fabricate monodisperse poly-glycidyl methacrylate （PGMA） coated polystyrene （IS） （PS/PGMA） core-shell polymer nanoparticles by seeded polymerization. Methods： The influences of concentrations of initiator （potassium persulfate）, surfactant （sodium dodecyl sulfate） and monomer （GMA）＇ s concentration as well as PS seed＇ s diameter on the size and morphology of the PS/PGMA mierospheres were investigated. Transmission electron microscopy （TEM） and infrared spectroscopy （IR） were used to characterize the prepared PS/PGMA microspheres. Results： The size of microspheres could be controlled by changing and optimizing the reaction condi- tions. IR showed that the GMA was really modified on the PS seeds. The prepared PS/PGMA was found by TEM with good spherical and apparent core-shell structure. Conclusion： The GMA-eoated PS microspheres can promise convenient surface modification and over- come the disadvantage of difficult surface functionalization of common PS microspheres.
出处
《天津医科大学学报》
2012年第4期416-418,421,共4页
Journal of Tianjin Medical University
基金
教育部博士点基金资助项目(201012021200033)
天津市高等学校科技发展基金计划项目(20070604)
