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    題名: The effect of Tween-20 additive on the morphology and performance of PVDF membranes
    作者: Hsu-Hsien Chang;Sheng-Chang Chen;Dar-Jong Lin;Liao-Ping Cheng
    關鍵詞: PVDF membrane;Surfactant;Macrovoid;Immersion precipitation;Ultra-filtration
    日期: 2014-09-15
    上傳時間: 2016-04-22 13:46:49 (UTC+8)
    出版者: Elsevier BV
    摘要: 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.
    關聯: Journal of Membrane Science 466, pp.302-312
    DOI: 10.1016/j.memsci.2014.05.011
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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