Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81366
Type: Artigo de periódico
Title: Poly(dimethylsiloxane) networks modified with poly (phenylsilsesquioxane)s: Synthesis, structural characterisation and evaluation of the thermal stability and gas permeability
Author: Prado, LASA
Sforca, ML
de Oliveira, AG
Yoshida, IVP
Abstract: Self-supported translucent films constituted of semi-inorganic polymeric materials were prepared by sol-gel process from poly(phenylsilsesquioxane) (PPSQ) and poly(dimethylsiloxane) (PDMS), modified by diphenylsilanediol (DPS), phenyltriethoxysilane (PTES) and/or tetraethoxysilane (TEOS). These materials were characterized by infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermo-gravimetric analysis (TGA). Permeability to N-2, O-2, CH4 and CO2 and selectivity for a specific gas pair were investigated using the time-lag method. In the gas separation process high permeability and selectivity coefficients were observed, particularly for the membrane containing DPS and PTES as additives, which presented potential applications in the separation of CO2/CH4 and CO2/N-2. The materials also showed good thermal stability, which could be correlated to the relative amounts between di-functional (D), tri-functional (T) and tetra-functional (Q) silicon units. (c) 2008 Elsevier Ltd. All rights reserved.
Subject: Polysiloxanes
Polymeric networks
Sol-gel process
Membranes
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/j.eurpolymj.2008.07.002
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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