کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
639541 | 1456193 | 2006 | 6 صفحه PDF | دانلود رایگان |
The separation of solutions containing non-polar solvents, like toluene, was found to be limited for PDMS membranes, which is due to the extensive swelling of PDMS in those solvents. To improve the performance of silicone-based membranes for separations in non-polar solvents, extra cross-linking was introduced via the introduction of fillers. Of all fillers tested, zeolites were most efficient in decreasing the swelling of the PDMS network. Zeolites induce an increased cross-linking density, which is explained by the interactions between the silanol-groups of the filler and the PDMS-chains. The performance in SRNF of filled and unfilled PDMS membranes were compared, demonstrating increased solute rejection in non-polar solvents and at higher temperatures upon filler addition.
Journal: Journal of Membrane Science - Volume 278, Issues 1–2, 5 July 2006, Pages 199–204