P84 polyimide membranes modified by a tripodal amine for enhanced pervaporation dehydration of acetone. (27th January 2015)

• Record Type: Journal Article
• Authors: Mangindaan, Dave W.; Woon, Nelson Minyang; Shi, Gui Min; Chung, Tai Shung
• Is Part Of: Chemical engineering science. Volume 122(2015)
• Page Start: 14
• Page End: 23
• Publication Date: 2015-01-27
• Subjects: Pervaporation -- Crosslinking -- Tris(2-aminoethyl)amine -- Acetone -- P84; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2014.09.014
• Languages: English
• ISSNs: 0009-2509

Abstract

Abstract: In this work we have fabricated P84 asymmetrical flat sheet membranes with a sponge-like structure by carefully formulating the polymer dope, followed by crosslinking the P84 membranes with a tripodal amine (tris(2-aminoethyl)amine (TAEA)) in a methanol solution, combined with heat treatment. The separation performances for acetone dehydration as functions of dope formulation, TAEA crosslinking time and post-annealing duration were further investigated and optimized by using the Taguchi statistical method. The membrane with the best pervaporation performance possessed a high separation factor of 983 with a reasonable flux of 0.658 kg m −2 h −1 . FESEM, FTIR and XPS were employed to elucidate the crosslinking mechanisms and explain the evolution of physicochemical properties and chemistry–performance relationship. A benchmark comparison indicates that the newly developed P84/TAEA crosslinked membrane has good separation performance for acetone dehydration. Highlights: P84 membrane crosslinked by using TAEA for acetone pervaporation. TAEA completely crosslinked P84 chains without inducing chain scission. TAEA crosslinking yields membranes with a high separation factor with a reasonable flux.