SDS/DTAB/碱金属氯化盐复配囊泡为模板制备PMMA微球  

Preparation of Polymethyl Methacrylate Microspheres Via SDS / DTAB / Alkali Chloride Mixed Vesicle Templates

作　　者：刘美娜[1] 杨妮[1] 许海媚[1] 郝力生[1] 南延青[1] 

机构地区：[1]湖南师范大学化学生物学及中药分析教育部重点实验室,化学化工学院,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2015年第1期38-44,F0003,共8页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(20976042);湖南省自然科学基金资助项目(09JJ001)

摘　　要：以SDS/DTAB/碱金属氯化盐水复配系统生成的囊泡为模板,制备了聚甲基丙烯酸甲酯(PMMA)中空微球,考察了盐浓度、碱金属离子类型、表面活性剂组成和总浓度对制备PMMA微球的平均粒径和多分散指数Pd I的影响.用TEM、DLS对囊泡及聚合后溶液中的PMMA微球进行了表征,用SEM、AFM和DLS对去除模板后的PMMA微球进行了表征,以探求制备粒径较均一PMMA微球的条件.结果表明,在其他因素不变的情况下,增大无机盐浓度,或减小SDS与DTAB物质的量之比,或减小表面活动性剂总质量分数,或kosmotropic型的碱金属离子被chaotropic型的碱金属离子取代,有利于粒径较均一的PMMA微球制备.The polymethyl methaerylate （PMMA） microspheres were prepared by using vesicles formed by aqueous mixed sodium dodecyl sulfate/dodecyl trimethylammonium bromide/alkali chloride systems as templates. The influences of salt concentration, the type of alkali ions, composition and total concentration of surfactants on Zaverage hydrodynamic radii and polydispersity indexes （PdI） of PMMA microspheres were investigated. In order to explore the conditions to prepare the PMMA microspheres with good monodispersity and low PdI, the vesicles and PMMA microspheres in polymerized solutions were characterized by TEM and DLS, and the PMMA microspheres after removing templates were characterized by SEM, AFM and DLS. Results show that when other factors are not changed, increasing inorganic salt concentration, or decreasing the molar ratio between SDS and DTAB, or decreasing the total surfactant mass fraction, or kosmotropic alkali ions being substituted by chaotropic ones, is beneficial for the preparation of PMMA microspheres with good monodispersity.

关 键 词：正负离子表面活性剂 囊泡 PMMA中空微球 TEM DLS 

分 类 号：O648[理学—物理化学]