Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/55101
Type: Artigo de periódico
Title: Asymmetric polysulfone and polyethersulfone membranes: effects of thermodynamic conditions during formation on their performance
Author: Barth, C
Goncalves, MC
Pires, ATN
Roeder, J
Wolf, BA
Abstract: Membranes of polysulfone (PSU) and polyethersulfone (PES) were prepared from ternary and quaternary mixtures containing N,N-dimethylformamide (DMF) as solvent, water as non-solvent, and acetone (AC) as additive. The conditions for phase inversion and the desired phase separation mechanisms were selected on the basis of the phase behavior determined for the solvent/non-solvent/polymer systems. The influences of the composition of the casting solution, of the support, and of film thickness on structure and permeation properties of the membranes were analyzed by scanning electron microscopy (SEM) plus flux and separation experiments. The mechanisms of phase inversion that should prevail under the different conditions according to the measured phase diagrams were corroborated by means of light scattering experiments. (C) 2000 Elsevier Science B.V. All rights reserved.
Subject: polysulfone
polyethersulfone
phase inversion membranes
nucleation and growth
spinodal decomposition
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0376-7388(99)00344-0
Date Issue: 2000
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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