Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81370
Type: Artigo de periódico
Title: Poly(ether imide) membranes obtained from solution in cosolvent mixtures
Author: Peinemann, KV
Maggioni, JF
Nunes, SP
Abstract: Integral asymmetric membranes for gas separation were prepared by casting a poly(ether imide) solution in tetrahydrofuran (THF) and gamma-butyrolactone (GBL) and coagulating in water. As observed by electron microscopy, very thin selective layers ( < 0.5 mu m) were obtained with high GEL contents or when butanol was also added to the casting solution, resulting therefore in the highest permeability values (up to 4671 He/m(2) h bar for membranes prepared from casting solutions with 56 wt% GEL). He/N-2 selectivity values as a function of solvent composition went through a maximum. Maximum values as high as 131 were obtained with equal amounts of THF and GEL in the solvent mixture. The kinetics and mechanism of membrane formation were investigated by light scattering. (C) 1998 Elsevier Science Ltd. All rights reserved.
Subject: phase separation
spinodal decomposition
nucleation and growth
Country: Inglaterra
Editor: Elsevier Sci Ltd
Rights: fechado
Identifier DOI: 10.1016/S0032-3861(97)10067-2
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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