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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/27936

    標題: Synthesis and characteristics of poly(N-isopropylacrylamide-co-methacrylic acid)/Fe3O4/poly(N-isopropylacrylamide-co-methacrylic acid) two-shell thermosensitive magnetic composite hollow latex particles
    作者: Lee, Chia-Fen
    Wang, Yu-Cheng
    Chiu, Wen-Yen
    貢獻者: 化妝品應用與管理系
    關鍵字: Core-Shell Polymers
    Emulsion Polymerization
    Hollow Latex Particle
    Soapless Emulsion Polymerization
    日期: 2013-07
    上傳時間: 2014-05-26 10:49:43 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: In this study, the poly(N-isopropylacrylamide-methylacrylate acid)/Fe3O4/poly(N-isopropylacrylamide-methylacrylate acid) (poly(NIPAAm-MAA)/Fe3O4/poly(NIPAAm-MAA)) two-shell magnetic composite hollow latex particles were synthesized by four steps. The poly(methyl methacrylate-co-methylacrylate acid) (poly(MMA-MAA)) copolymer latex particles were synthesized first. Then, the second step was to polymerize NIPAAm, MAA, and crosslinking agent in the presence of poly(MMA-MAA) latex particles to form the linear poly(MMA-MAA)/crosslinking poly(NIPAAm-MAA) core-shell latex particles. Then, the core-shell latex particles were heated in the presence of NH4OH to dissolve the linear poly(MMA-MAA) core to form the poly(NIPAAm-MAA) hollow latex particles. In the third step, the Fe3O4 nanoparticles were generated in the presence of poly(NIPAAm-MAA) hollow polymer latex particles and formed the poly(NIPAAm-MAA)/Fe3O4 magnetic composite hollow latex particles. The fourth step was to synthesize poly(NIPAAm-MAA) in the presence of poly(NIPAAm-MAA)/Fe3O4 latex particles to form the poly(NIPAAm-MAA)/Fe3O4/poly(NIPAAm-MAA) two-shell magnetic composite hollow latex particles. The effect of various variables such as reactant concentration, monomer ratio, and pH value on the morphology and volume-phase transition temperature of two-shell magnetic composite hollow latex particles was studied. Moreover, the latex particles were used as carriers to load with caffeine, and the caffeine-loading characteristics and caffeine release rate of latex particles were also studied. (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2880-2891
    關聯: Journal of Polymer Science Part A-Polymer Chemistry, v.51 n.13, pp.2880-2891
    Appears in Collections:[化妝品應用與管理系(所)] 期刊論文

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