摘要
以新型两亲性嵌段共聚物聚(4-乙烯基吡啶)-b-聚[6-(4-丁基偶氮苯-4’-氧基)己基甲基丙烯酸酯](P4VP-b-PAzoMA)为研究对象,探究其在水体系中的自组装行为。通过透射电镜、激光光散射、紫外分光光度计等表征组装体的形貌和结构特征。结果表明:通过调节聚合物溶液的初始质量浓度、pH和溶剂,可改变组装体的结构;紫外-可见光的照射可使组装体发生可逆的光致异构化行为,且异构化速率随着聚合物质量浓度的增加而减小;此外,随着溶剂的极性增加,偶氮苯的特征吸收峰发生红移。
The self-assembly behavior of a novel amphiphilic copolymer, poly（4-vinylpyridine）-b-poly{6- [4 （4＇-butyloxyphenylazo）phenoxy]hexyl methacrylate} （P4VP-b PAzoMA）, was investigated in aqueous media. The morphologies and structures of aggregates were studied by means of Transmission Electron Microscopy （TEM）, Laser Light Scattering （LLS） and UV Vis spectrophotometer. Results showed that the aggregates with various morphologies were prepared by tailoring the initial concentration, solvent and pH value. The reversible trarecis isomerization behavior of aggregates was observed by UV-Vis irradia tion. The isomerization rate decreased with the increasing of the copolymer concentration. Besides, the red shift of absorption peak of azobenzene moieties was obtained by increasing the solvent polarity.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2015年第2期116-122,共7页
Journal of Functional Polymers
基金
国家自然科学基金(51103044)
教育部新世纪优秀人才支持计划(NCET-12-0857)
关键词
两亲性
自组装
偶氮苯
光响应行为
amphiphilicity
self-assembly
azobenzene
photoresponsive behavior
