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    题名: The effect of Tween-20 additive on the morphology and performance of PVDF hollow fiber membranes
    作者: Chen, Sheng-Chang;Chang, Hsu-Hsien;Sheng-Huang Wu, Tong-Wen Cheng;Su, Yan-Lin;Cheng, Liao-Ping
    关键词: PVDF membrane;Surfactant;Macrovoid;Immersion precipitation;Ultra-filtration
    日期: 2015-07-26
    上传时间: 2016-04-27 11:23:41 (UTC+8)
    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: 2nd International Conference on Desalination using Membrane Technology
    DOI: 10.1016/j.memsci.2014.05.011
    显示于类别:[化學工程與材料工程學系暨研究所] 會議論文

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