Asymmetric porous thin film preparation by controlled solvent absorption using PDMS

Seokyong Song, Dahl Young Khang, M. Joon Kim, Jeong Eun Park, Hong H. Lee

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)5-12
Number of pages8
JournalJournal of Membrane Science
Issue number1-2
Publication statusPublished - 2007 Nov 15

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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