Self-assembly of Gradient Copolymer Synthesized by Spontaneous Batch RAFT Emulsion Polymerization and Its Application on Encapsulating Ag Nanoparticles

查看全文 作　　者：[1]秦超然;FENG [1]Menran;LUO [1]Wen;LIU [1]Mingyang;HAN [1]Mei;MA [1]Shuai;[1]王艺峰 机构地区：[1]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2018年第33卷第4期,共8页 基　　金：the National Natural Science Foundation of China(Nos.50803048 and 50703030) 摘　　要：The gradient copolymers of acrylic acid and trifluoroethyl methacrylate(coded as P(TFEMAgrad-AA)) were synthesized via reversible addition-fragmentation transfer(RAFT) emulsifier-free emulsion polymerization. The spontaneous batch feeding approach was used to control the gradient chain sequence. Transmission electron microscopy(TEM) analysis revealed that the P(TFEMA-grad-AA) can self-assemble to form spherical micelles, rodlike micelles or vesicles in selective solvents. Morphological transition of the P(TFEMA-grad-AA) micelles was sensitive to the water content of the dioxane/water mixed solvent. More interestingly, Ag nanoparticles(NPs) were encapsulated by the P(TFEMA-grad-AA) micelles during the selfassembly process. The gradient chain sequence made the Ag NPs easily enter the core of the micelles, even when P(TFEMA-grad-AA) had less hydrophobic fluoro-units and more hydrophilic units. TEM images with energy dispersive spectrometer indicated that the nanocomposite micelles consisted of a Ag NPs core and a gradient copolymer shell. 关 键 词：共聚物 坡度 Ag 程序综合 聚合 乳剂 组装 应用