English  |  正體中文  |  简体中文  |  Items with full text/Total items : 66984/66984 (100%)
Visitors : 23080431      Online Users : 582
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26376

    Title: Donnan potential of dilute colloidal dispersions: Monte Carlo simulations
    Authors: Wang,TY;Sheng,YJ;Tsao,HK
    Contributors: 化學工程與材料工程學系
    Date: 2009
    Issue Date: 2010-06-29 17:26:40 (UTC+8)
    Publisher: 中央大學
    Abstract: Donnan equilibrium between a salt-free colloidal dispersion and an electrolyte solution has been investigated by Monte Carlo simulations. The Donnan potential is directly calculated by considering two compartments separated by a semipermeable membrane. In order to understand the role played by colloid-ion interactions, the influences of colloidal characteristics, including particle size R, intrinsic particle charge Z, counterion valency z(c), and concentration c(p), on Donnan potential Psi(D) and effective charge Z(eff) are examined. Our Simulations show that the electroneutrality condition is not followed in both compartments and the Dorman potential arises due to the net charge density. The Donnan potential grows by increasing c(p) and Z(eff) and by decreasing dielectric constant epsilon(r), i.e., Psi(D) similar to Z(eff)c(p)/epsilon(r), approximately. Note that the effective charge varies with R.Z.c(p), epsilon(r), and z(c) as well. When the salt concentration is increased, the net charge density is lowered and thus the Donnan potential decays accordingly. The validity of the classical theory based on the Nernst equation and the electroneutrality assumption is also examined. In general, the simulation results at high-salt condition can be well represented by such mean-field theory. (C) 2009 Published by Elsevier Inc.
    Appears in Collections:[化學工程與材料工程研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明