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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/100127

    Title: Effects of cooling temperature and aging treatment on the morphology of nano- and micro-porous poly(ethylene-co-vinyl alcohol) membranes by thermal induced phase separation method
    Authors: Chang, Hsu-Hsien;Konstantinos Beltsios;Chen, Yih-Hang;Lin, Dar-Jong;Cheng, Liao-Ping
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: membranes;crystallization;ageing;nanostructured polymers;morphology
    Date: 2013-12-30
    Issue Date: 2015-01-28 11:36:10 (UTC+8)
    Publisher: Hoboken: John Wiley & Sons, Inc.
    Abstract: Poly(ethylene-co-vinyl alcohol) (EVOH 32) / 1,3-propanediol mixtures are processed by thermally induced phase separation for the formation of porous membranes. The crystallization line was determined both by the cloud-point and DSC methods. Two precursor solution compositions, four quench temperatures and various aging times were explored. It is found possible to generate both polymer-crystallization controlled morphologies (for high quenches and/or sufficiently aged dopes), especially globular microporous ones, and novel nano-scale porous morphologies dominated by intra-binodal phase separation (for low quenches and limited or no precursor solution aging). Structural characterization of the membranes was accomplished via application of scanning electron microscopy and wide angle X-ray diffraction.
    Relation: Journal of Applied Polymer Science 131(12), 40374(8 pages)
    DOI: 10.1002/app.40374
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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