Transport Phenomena of Chitosan Membrane in Pervaporation of Water-Ethanol Mixture
Transport Phenomena of Chitosan Membrane in Pervaporation of Water-Ethanol Mixture
复制标题
水-乙醇混合物渗透汽化中壳聚糖膜的传输现象
DOI：
10.1080/01496399808544994
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Chengzhang Jiang
中科院分区：
文献类型：
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作者：
Jizhong Ren;Chengzhang Jiang
摘要研究了壳聚糖膜和H2SO4交联壳聚糖膜上H2O-EtOH溶液的渗透蒸发传输过程。还研究了浓度、温度、交联等因素的影响。渗透通量与进料浓度的关系表明，渗透过程中存在较强的耦合效应。热力学膨胀—分布关系随进料浓度的变化也表明热力学膨胀过程存在较强的耦合效应。渗透通量和热力学膨胀过程与进料中的浓度有类似的关系。膜在热力学溶胀分布过程中的高溶胀率和高选择性是渗透蒸发的高通量和高选择性的基础。随着温度的升高，膜的渗透通量迅速增加，但膜中水和乙醚的溶胀率几乎没有变化。这表明…
ABSTRACT The pervaporation transport process of H2O-EtOH solution was studied on a chitosan membrane and on a H2SO4 crosslinked chitosan membrane. The influence of concentration, temperature, and crosslinking was also studied. The dependence of permeation fluxes on feed concentration showed strong coupling effects existed in the permeation process. That the thermodynamic swelling—distribution relationship changed with the feed concentration also showed that a strong coupling effect existed in the thermodynamic swelling process. The permeation fluxes and thermodynamic swelling processes showed analogous relationships versus the concentration in the feed. The high swelling ratio and the high selectivity of the membrane in the thermodynamic swelling distribution process was the basis ofhigh flux and high permselectivity of pervaporation. With an increase of temperature, the permeation fluxes increased quickly, but the swelling ratio of water and EtOH in the membrane scarcely changed. This showed that an incr...