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Fabrication of three‐dimensionally ordered microporous membrane by wet phase separation
Author(s) -
Taketani Yuko,
Nagaoka Shoji,
Kawakami Hiroyoshi
Publication year - 2004
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/app.20250
Subject(s) - polyimide , membrane , microporous material , materials science , phase inversion , porosity , chemical engineering , polymer chemistry , fabrication , filtration (mathematics) , solvent , ternary operation , membrane structure , composite material , layer (electronics) , chemistry , organic chemistry , medicine , biochemistry , alternative medicine , statistics , mathematics , computer science , engineering , programming language , pathology
We report a novel porous fluorinated polyimide membrane with a cylinder structure fabricated by a wet phase inversion process, which is formed by a ternary system, polyimide/solvent/water. The porous polyimide membranes consisted of a thin top porous layer and three‐dimensionally ordered cylinder micropores. The porous membrane‐forming solvents were N ‐methylpyrrolidone containing nonsolvent additives such as alcohol, and the height and width of the cylinder structure were controlled by the solvents. Water fluxes through the porous polyimide membranes were measured using a stirred dead‐end filtration cell, and the fluxes of the porous membrane with the cylinder‐type structure were approximately three times greater than those of the membrane with the finger‐type structure. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 3016–3021, 2004