Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/27624
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    標題: Synthesis and Characteristics of Poly(N-isopropylacrylamide-co-methacrylic acid)/Fe3O4 Thermosensitive Magnetic Composite Hollow Latex Particles
    作者: Lee, Chia-Fen
    Lin, Mei-Ling
    Wang, Yu-Cheng
    Chiu, Wen-Yen
    貢獻者: 化妝品應用與管理系
    關鍵字: Composites
    Core-Shell Polymers
    Emulsion Polymerization
    Fe3O4
    Hollow Latex Particle
    Latices
    Lcst
    Soapless Emulsion Polymerization
    Thermosensitive
    日期: 2012-07-01
    上傳時間: 2014-03-21 16:15:38 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: In this study, the poly(NIPAAm-MAA)/Fe3O4 hollow latex particles were synthesized by three steps. The first step was to synthesize the poly(methyl methacrylate-co-methylacrylate acid) (poly(MMA-MAA)) copolymer latex particles by the method of soapless emulsion polymerization. Following the first step, the second step was to polymerize N-isopropylacrylamide (NIPAAm), MAA, and crosslinking agent (N,N'-methylene-bisacrylamide (MBA)) in the presence of poly(MMA-MAA) latex particles to form the linear poly(MMA-MAA)/crosslinking poly (NIPAAm-MAA) core-shell latex particles. After the previous processes, the core-shell latex particles were heated in the presence of NH4OH to dissolve the linear poly(MMA-MAA) core in order to form the poly(NIPAAm-MAA) hollow latex particles. In the third step, Fe2+ and Fe3+ ions were introduced to bond with the -COOH groups of MAA segments in the poly(-NIPAAm-MAA) hollow polymer latex particles. Further by a reaction with NH4OH and then Fe3O4 nanoparticles were generated in situ and the poly(NIPAAm-MAA)/Fe3O4 magnetic composite hollow latex particles were formed. The concentrations of MAA, crosslinking agent (N,N'-methylene bisacrylamide), and Fe3O4 nanoparticles were important factors to influence the morphology of hollow latex particles and lower critical solution temperature of poly(NIPAAm-MAA)/Fe3O4 magnetic composite hollow latex particles. (C) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 50: 2626-2634, 2012
    關聯: Journal of Polymer Science Part A-Polymer Chemistry, 50(13), 2626-2634
    显示于类别:[化妝品應用與管理系(所)] 期刊論文

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