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In situ study on kinetic behavior during asymmetric membrane formation via phase inversion process using Raman spectroscopy
Author(s) -
Kim H. J.,
Fouda A. E.,
Jonasson K.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(20000103)75:1<135::aid-app15>3.0.co;2-9
Subject(s) - polysulfone , phase inversion , raman spectroscopy , membrane , in situ , polymer , solvent , phase (matter) , chemistry , kinetic energy , chemical engineering , ternary operation , spectroscopy , polymer chemistry , analytical chemistry (journal) , materials science , chromatography , organic chemistry , optics , biochemistry , physics , quantum mechanics , computer science , programming language , engineering
Asymmetric membrane formation has been studied by using an in situ analysis developed with a Micro Raman spectroscopy, which emphasizes kinetic aspects of the phase inversion process. Changes in composition with time was successfully measured on the gelation bath‐side as well as inside the precipitated phase for the polymer/solvent/nonsolvent system of polysulfone/1‐methyl‐2‐pyrrolidinone/ethanol. The results shows that resulting relative mass transfer rates of solvent and nonsolvent during the phase inversion process strongly influence the final membrane morphologies. In addition, ternary compositions at which phase separation initiates were explored by analyzing the coagulation front. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 135–141, 2000