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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/112823


    Title: The effect of Tween-20 additive on the morphology and performance of PVDF membranes
    Authors: Hsu-Hsien Chang;Sheng-Chang Chen;Dar-Jong Lin;Liao-Ping Cheng
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: PVDF membrane;Surfactant;Macrovoid;Immersion precipitation;Ultra-filtration
    Date: 2014-09-15
    Issue Date: 2018-03-02 12:13:58 (UTC+8)
    Publisher: Elsevier BV
    Abstract: The effects of additive, Tween-20, on the morphology and ultra-filtration performance of the PVDF membranes formed by isothermal immersion precipitation from the Tween-20/water/TEP/PVDF system were investigated. High resolution FESEM imaging indicates that the membranes׳ bulk constituted of interlinked crystalline particles, whose shapes change from more sheaf-like to more stick-like as larger amounts of Tween-20 were initially added into the dope. Introduction of Tween-20 caused formation of nano-pores on the top surfaces of the membranes and micron-sized columnar voids underneath the top skin layer. Some small amounts of Tween-20 may reside in the formed membrane if the nascent membrane has not been carefully washed. Presence of Tween-20 in the membrane was analyzed by water contact angle measurements, Fourier Transform Infrared-Attenuated total reflection spectroscopy (FTIR-ATR), Nuclear Magnetic Resonance (NMR), and X-ray Photoelectron Spectroscopy (XPS). Furthermore, water flux and blue dextran filtration experiments were carried out to illustrate the potential applications of the membranes in fine separation processes.
    Relation: Journal of Membrane Science 466, p.302-312
    DOI: 10.1016/j.memsci.2014.05.011
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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