Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/27903
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 16812/19099 (88%)
造访人次 : 6365803      在线人数 : 81
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.cnu.edu.tw/handle/310902800/27903


    標題: Positron annihilation spectroscopic study on fine-structure characterization and ethanol dehydration by pervaporation for interfacially polymerized composite membranes
    作者: Chao, Wei-Chi
    Huang, Shu-Hsien
    Wei, Shi-Wei
    Huang, Yun-Hsuan
    Liao, Kuo-Sung
    Lai, Cheng-Lee
    Tsai, Hui-An
    Lee, Kueir-Rarn
    貢獻者: 環境工程與科學系
    關鍵字: Pervaporation
    Interfacial Polymerization
    Positron Annihilation Lifetime Spectroscopy (Pals)
    日期: 2013-02
    上傳時間: 2014-05-26 10:48:22 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: In this study, polyamide (PA) composite membranes (DMDPA-TMC/CA, NTEA-TMC/CA, DETA-TMC/CA) were prepared through the interfacial polymerization reaction between a trimesoyl chloride (TMC) and each of the following three amines: 3,3-diamino-N-methyl-dipropylamine (DMDPA), nitrilotriethylamine (NTEA), and diethylenetriamine (DETA), on the surface of an asymmetric cellulose acetate (CA) membrane. The effects of the amine chemical structure and the interfacial polymerization conditions on the dehydration of an aqueous ethanol solution by pervaporation were investigated. To characterize the swelling behavior and the resulting free volume variation in the interfacially polymerized PA layers, the PA membranes in dry and wet (with aqueous ethanol solution) conditions were probed by positron annihilation lifetime spectroscopy (PALS). The difference between the o-Ps lifetime in the wet and that in the dry condition (Delta tau(3)=tau(3w)-tau(3d)) of the interfacially polymerized PA membranes increased in the following order: DETA-TMC < DMDPA-TMC < NTEA-TMC. The swelling effect induced by the aqueous ethanol solution was restricted by the crosslinking structure in the PA layer. This result corresponded well with that of the XPS analysis. The DETA-TMC/CA composite membrane prepared using the desirable interfacial polymerization conditions (immersion in the aqueous solution of 0.5 wff DETA for 10 s, and contact with the organic solution of 0.5 wff TMC for 5 s) exhibited the following desirable pervaporation performance in dehydrating an aqueous solution of 90 wt% ethanol at 25 degrees C: a permeation flux of 1220 g/m(2) h and a water concentration in permeate of 98.4 wt%. It was also found that the DETA-TMC/CA composite membrane exhibited superior performance compared to the composite membranes discussed in the literature. (C) 2012 Elsevier B.V. All rights reserved.
    關聯: Journal of Membrane Science, v.429, pp.34-43
    显示于类别:[環境工程與科學系(所)] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    index.html0KbHTML499检视/开启


    在CNU IR中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈