کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
638288 | 1456167 | 2007 | 8 صفحه PDF | دانلود رایگان |
We present a simple and yet effective method of producing asymmetric polymeric membranes. All it takes to prepare the membrane is to place a flat slab, which can absorb the solvent readily, on a polymer solution. The rapid absorption of the solvent by the slab leads to the formation of a thin dense skin layer and the presence of this top dense layer allows for the phase separation in the polymer solution to proceed beneath the layer. The solubility of a polymer in a solvent, as affected by solubility parameter and polymer molecular weight, determines the morphology of the membrane prepared by this controlled solvent absorption method. The preparation conditions can be tailored to produce “double-skinned” membranes and membranes with localized pore structure.
Journal: Journal of Membrane Science - Volume 305, Issues 1–2, 15 November 2007, Pages 5–12