Liquid transport through membranes prepared by grafting of polar monomers onto poly(tetrafluoroethylene) films. III. Steady-state distribution in membrane during pervaporation
Liquid transport through membranes prepared by grafting of polar monomers onto poly(tetrafluoroethylene) films. III. Steady-state distribution in membrane during pervaporation
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通过将极性单体接枝到聚（四氟乙烯）薄膜上制备的膜进行液体传输。
DOI：
10.1002/app.1974.070180205
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发表时间：
1974
影响因子：
3
通讯作者：
J. Neel
中科院分区：
文献类型：
--
作者：
P. Aptel;J. Cuny;J. Jozefonvicz;G. Morel;J. Neel
稳态浓度和成分梯度的渗透蒸发液体内的膜进行了测量，使用堆栈的膜。纯组分的实验结果与无孔膜中沿化学势梯度扩散的简单机制一致。对于混合物，浓度梯度是类似的纯液体，和组成分布表明，这两种物种之间的选择不发生在膜中的一个给定的界面，但沿着通过膜的扩散路径进行。数据也被列出，以表明发生的溶解度和扩散系数的增强与膜的碱性基团的氢键的组件。
Steady-state concentration and composition gradients of pervaporating liquids inside the membranes were measured using stacks of membranes. The experimental results on pure components agree well with a simple mechanism of diffusion down a chemical potential gradient in a nonporous membrane. For mixtures, concentration gradients are similar to those obtained for pure liquids, and composition distribution shows that the selection between the two species does not take place at a given interface in the membrane but is progressive along the diffusional paths through the membrane. Data are also listed to show that solubility and diffusivity enhancements occur for components which are hydrogen bonded with the basic groups of the membrance.