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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/28494


    標題: A study on high-performance composite membranes comprising heterogeneous polyamide layers on an electrospun substrate for ethanol dehydration
    作者: Hung, Wei-Song
    Lai, Cheng-Lee
    An, Quanfu
    De Guzman, Manuel
    Shen, Tai-Jung
    Huang, Yun-Hsuan
    Chang, Kuei-Chien
    Tsou, Chi-Hui
    Hu, Chien-Chieh
    Lee, Kueir-Rarn
    貢獻者: 環境工程與管理系
    關鍵字: Heterogeneous polyamide
    Dynamic interfacial polymerization
    Electrospinning
    Positron annihilation lifetime spectroscopy
    Free volume
    日期: 2014-11
    上傳時間: 2015-05-06 21:18:18 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: We fabricated a novel high-performance pervaporation membrane for ethanol dehydration through interfacial polymerization integrated with spin-coating, a method we called dynamic interfacial polymerization. Varying amine and ac-yl chloride monomers were used to assemble heterogeneous polyamicle layers on an electrospun polyacrylonitrile substrate. The performance of the composite membrane comprising a highly crosslinked top layer surpassed that of the commercial PERVAP 2210 membrane: the permeation flux (13.9 kg/m(2)h) was eight Limes higher and the separation factor (4491) 19 Limes. It also exhibited stability during the peryaporation operation for 20 clays. Positron annihilation lifetime spectroscopy indicated the effect of the layers' free volume on the membrane performance. Doppler broadening energy spectroscopy gave information on interfacial defects. We also investigated the performance of composite membranes with homogeneous layers; despite assembling five homogeneous layers, the permeate concentration reached only up to 93.7 wt% water. (C) 2014 Elsevier B.V. All rights reserved.
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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