Department of Chemical Engineering, Laboratory of Applied Physical Chemistry and Environmental Technology, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001 Leuven, Belgium.
J Colloid Interface Sci. 2010 Jun 1;346(1):254-64. doi: 10.1016/j.jcis.2010.02.023. Epub 2010 Feb 14.
Laboratory-made silicalite filled PDMS membranes were tested by means of concentration and temperature influence on the membrane performance in removal of ethanol from ethanol/water mixtures. This allowed studying the applicability of solution-diffusion model in the transport mechanism description. Experiments were performed by varying the ethanol concentration in the feed and temperature. Two types of fillers were incorporated into the PDMS network: commercial zeolite silicalite (CBV 3002) and laboratory-made colloidal silicalite-1. Obtained results were then compared with data gathered for unfilled PDMS membranes to examine the effect of fillers incorporation. Moreover, the comparison with novel block co-polymer based porous and dense SBS membranes was done. It was found that the solution-diffusion model was a good representation of ethanol transport through both filled and unfilled PDMS membranes, whereas the water flux did not obey this model due to the swelling effects. Incorporation of the fillers increased membrane stability and improved the selectivity. Performance of the SBS membranes characterized by a dense structure was found to be similar to the performance of filled PDMS membranes.
实验室合成的硅沸石填充 PDMS 膜通过浓度和温度对乙醇/水混合物中乙醇去除的膜性能的影响进行了测试。这使得可以研究在传输机制描述中溶液扩散模型的适用性。通过改变进料中的乙醇浓度和温度进行了实验。将两种类型的填料引入 PDMS 网络中：商业沸石硅沸石（CBV 3002）和实验室合成的胶体硅沸石-1。然后将获得的结果与未填充 PDMS 膜的数据进行比较，以检查填料掺入的效果。此外，还与新型基于嵌段共聚物的多孔和致密 SBS 膜进行了比较。结果发现，溶液扩散模型是填充和未填充 PDMS 膜中乙醇传输的良好表示，而由于溶胀效应，水通量不遵守该模型。填料的掺入增加了膜的稳定性并提高了选择性。具有致密结构的 SBS 膜的性能被发现与填充 PDMS 膜的性能相似。
