Liquid permeation and separation by surface-modified polyethylene membranes
Liquid permeation and separation by surface-modified polyethylene membranes
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表面改性聚乙烯膜的液体渗透和分离
DOI：
10.1016/s0376-7388(00)82290-5
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
T. Hamaya
中科院分区：
文献类型：
--
作者：
S. Yamada;T. Hamaya
本研究进行澄清的作用，在分离功能的活性层，并确定在有机混合物的渗透汽化过程中，通过表面改性膜的渗透速率和选择性的参数。这些膜是通过表面氯化聚乙烯与乙二胺，磷酸三苯酯和亚磷酸三乙酯的化学反应制备的，以获得特定的膜，其本体性质保持不变，但具有与二元有机混合物如苯-苯胺，苯-苄醇或苯-苯酚的一种组分具有较强的分子相互作用的官能团。衰减全反射光谱和干涉显微镜观察表明，这些膜的功能团只在膜表面上，正如预期的那样。当改性膜放置为使反应表面面向下游侧时，乙二胺膜对苯-苯胺进料的分离因子明显降低，尽管当膜倒置在渗透蒸发池上时分离因子相同。这些事实表明，活性层在分离功能中起着重要作用。可以得出结论，选择性可以定性地解释在膜表面的溶解度参数和进料溶液的组分，在我们的系统中，是非极性和非水有机溶液。
This study was undertaken to clarify the role of the active layer in the separation function and to determine the parameters governing permeation rate and selectivity in the process of pervaporation of organic mixtures through surface-modified membranes. These membranes were prepared by chemical reaction of surface-chlorinated polyethylenes with ethylenediamine, triphenylphosphate and triethylphosphite in order to obtain a specific membrane, the bulk properties of which remain unchanged, but which possesses functional groups that have a strong molecular interaction with one component of a binary organic mixture such as benzene—aniline, benzene—benzyl alcohol or benzene—phenol. The attenuated total reflection spectra and interference microscopy observations showed that these membranes had functional groups only on the membrane surface, as had been expected. The separation factor of the ethylenediamine membranes for a benzene—aniline feed apparently decreased when the modified membrane was placed so that the reacted surface faced the down-stream side, although the separation factor was identical when the membrane was mounted upside down on the pervaporation cell. These facts demonstrate that the active layer plays an important role in the separation function. p]It is concluded that the selectivity can be qualitatively explained in terms of both solubility parameters of the membrane surface and the components of the feed solution which, in our systems, are non-polar and non-aqueous organic solutions.