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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44197


    Title: Membrane formation by isothermal precipitation in polyamide-formic acid-water systems I. Description of membrane morphology
    Authors: Cheng, Liao Ping;Shaw, Horng-Yue
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: membrane;polyamides;Nylon-66;immersion precipitation;microporous membrane
    Date: 1995-01
    Issue Date: 2013-06-13 11:28:56 (UTC+8)
    Publisher: Hoboken: John Wiley & Sons, Inc.
    Abstract: Aliphatic polyamides (Nylon-66 and a Nylon-6, -66, -610 terpolymer) were isothermally precipitated from formic acid solution by immersing in an aqueous nonsolvent bath or a solvent/nonsolvent mixture. Depending on the composition of the polymer solution and nonsolvent bath, phase separation by nucleation and growth can be initiated for a liquid-liquid phase separation process, a crystallization process or a combined process. Under certain conditions, crystallization of Nylon-66 results in a membrane with a uniform skinless microporous structure that was rapidly wetted by water. In contrast, liquid-liquid phase separation produces a polyamide film with largely unconnected cellular voids that is as a result not wetted by water.
    Relation: Journal of Polymer Science, Part B: Polymer Physics 33(2), pp.211-222
    DOI: 10.1002/polb.1995.090330206
    Appears in Collections:[化學工程與材料工程學系暨研究所] 期刊論文

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