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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/79326

    Title: 軟膠體之壓縮及微過濾機構之研究
    Other Titles: Studies on mechanisms of compression and microfiltration of soft particles
    Authors: 黃國楨;Hwang, K .J.;王雅婷;Wang, Y.T.
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: 微過濾;軟膠體;濾餅性質;濾餅壓縮;microfiltration;soft colloids;cake property;cake compression
    Date: 2008-09
    Issue Date: 2012-12-03 22:06:11 (UTC+8)
    Publisher: 臺北市:行政院國家科學委員會
    Abstract: 本研究旨在探討軟膠體粒子之微過濾機構及壓縮
    性質。本研究採用三種不同分子量(70 kDa ' 500 kDa 及
    2000 kDa) 的葡聚酵分別與過錳酸鉀交聯成葡聚醣-二氧
    成緻密層(skin layer) ,故其過濾、速度會最慢,而掃流速
    厚度越簿,阻力越大。The mechanisms of compression and
    microfiltration of soft particles are studied. Different kinds
    of Dextran-MnO gel particles are prepared depending on
    2 different molecular weights of dextran (70, 500 and 2000
    kDa). The porous soft particles are filtered in "dead-end"
    and "cross-flow" microfiltration, respectively. Although
    the mean sizes, zeta potentials and densities of these
    particles are almost the same, their filtration characteristics
    are far different due to their mechanical strengths and
    compressibility. The deformation and compression of
    particles may reach the pseudo-steady state more quickly
    for the particles constructed with higher molecular weight of dextran. The quicker skin-layer formation leads to a
    lower filtration rate. Although the shear stress acting on the
    membrane surface increases with increasing cross-flow
    velocity, whether the pseudo-steady filtration rate will be
    increased or not is dependent on the cake compression
    course. Moreover, the probabilities of particle deposition
    on the membrane surface under various conditions are
    estimated based on a force balance model. An increase in
    the molecular weight of dextran causes the cake
    compression to be more serious and the filtration rate to be
    Relation: 2008年輸送現象及其應用研討會論文摘要集 ( 2008 Symposium of transport phenomena and applications abstract book)
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Proceeding

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