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Type: Artigo de periódico
Title: Organic-inorganic membranes prepared from polyether diamine and epoxy silane
Author: Sforca, ML
Yoshida, IVP
Nunes, SP
Abstract: Organic-inorganic polymer membranes were prepared by reacting 3-glycidoxypropyl trimethoxysilane with diamines containing polyether segments, followed by hydrolysis and condensation with acid catalysis. The films were characterized by nuclear magnetic resonance and by dynamic mechanical analysis. The rigidity of the films increased with increasing epoxy content and also with addition of tetraethoxy silane (TEOS) to the reacting medium. Water absorption experiments showed that the diffusivity is decreased with increasing TEOS content. Membranes were evaluated for nanofiltration giving cut offs down to 860 g/mol (with a water flux of 2.5 l/h m(2) bar). For gas separation, CO2/N-2 selectivity values up to 89 were obtained with CO2 permeability of 125 Barrer. (C) 1999 Elsevier Science B.V. All rights reserved.
Subject: organic-inorganic membranes
polyether diamine
epoxy silane
Country: Holanda
Editor: Elsevier Science Bv
Citation: Journal Of Membrane Science. Elsevier Science Bv, v. 159, n. 41671, n. 197, n. 207, 1999.
Rights: fechado
Identifier DOI: 10.1016/S0376-7388(99)00059-9
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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