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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/27545

    標題: Pervaporation separation of ethanol/water mixture by UV/O-3-modified PDMS membranes
    作者: Lai, Cheng-Lee
    Fu, Ywu-Jang
    Chen, Jung-Tsai
    An, Quan-Fu
    Liao, Kuo-Sung
    Fang, Shih-Ching
    Hu, Chien-Chieh
    Lee, Kueir-Rarn
    貢獻者: 環境工程與科學系
    關鍵字: Uv/Ozone Modification
    Pdms Membrane
    日期: 2012-10-24
    上傳時間: 2014-03-21 16:13:02 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: A UV/O-3 surface modification technology was used to develop high-performance dense polydimethylsiloxane (PDMS) pervaporation membranes for separating ethanol/water mixtures. Surface characteristics of PDMS membranes were evaluated by attenuated total reflectance - Fourier transform infrared spectroscopy, scanning electron microscopy - energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and water contact angle measurement. The effect of UV/O-3 treatment time and working distance on the membrane physical and chemical properties and pervaporation performance were investigated. Results indicated that either longer treatment time or shorter working distance resulted in lower water contact angle and higher O/Si ratio, which implied higher conversion of PDMS into hydrophilic silica-like structure. The selectivity was greatly improved with longer treatment time and decreasing working distance. The UV/O-3 modification technique effectively increased the pervaporation performance of PDMS, especially at high temperature conditions of the feed. (c) 2012 Elsevier B.V. All rights reserved.
    關聯: Separation And Purification Technology, 100, 15-21
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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