Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/28702
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    標題: Synthesis and Properties of Thermoresponsive Magnetic Polymer Composites and Their Electrospun Nanofibers
    作者: Huang, Shih-Ru
    Lin, King-Fu
    Lee, Chia-Fen
    Chiu, Wen-Yen
    貢獻者: 化粧品應用與管理系
    關鍵字: composite
    PNIPAAm
    thermo-responsive
    magnetic
    electrospinning
    日期: 2014-03
    上傳時間: 2015-05-06 21:25:45 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: The thermoresponsive magnetic polymer composites and nanofibers were fabricated. Their thermal and magnetic properties were also investigated. Fe3O4 nanoparticles were prepared by coprecipitation method. Further condensation reaction was used to fabricate the double-layer lauric acid modified Fe3O4 (DLF) nanoparticles dispersed well in water. Thermal properties of poly(N-isopropylacrylamide) (PNIPAAm) and DLF/PNIPAAm composites and their aqueous solutions were measured by TGA and DSC. With the increasing of DLF content, the interaction between DLF and PNIPAAm caused the lower critical solution temperature (LCST) of polymer solution to shift from 33 to 31.25 degrees C. The effects of concentration and pH on LCST were also studied. The DLF/PNIPAAm nanofibers were fabricated by electrospinning. Their diameters were around 100-250 nm. Magnetization curves of DLF/PNIPAAm composite and nanofibers were overlapped and the saturated magnetizations were the same. Magnetic attraction behaviors of DLF/PNIPAAm polymer solution at temperatures below and above LCST were different. Aggregation of DLF/PNIPAAm above LCST enhanced magnetic moment density as well as magnetic attraction ability. (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 848-856
    關聯: Journal of Polymer Science Part A-Polymer Chemistry, v.52 n.6, pp.848-856
    显示于类别:[化妝品應用與管理系(所)] 期刊論文

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