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Title: Silica filled poly(1-trimethylsilyl-1-propyne) nanocomposite membranes: Relation between the transport of gases and structural characteristics
Authors: De Sitter, K
Winberg, P
Dotremont, C
Leysen, R
Martens, J.A.
Maurer, Frank H. J.
Vankelecom, IFJ
Issue Date: 2006
Citation: JOURNAL OF MEMBRANE SCIENCE, 278(1-2). p. 83-91
Abstract: The performance of poly(1-trimethylsilyl-1-propyne) (PTMSP)/silica nanocomposites was studied for membranes with a filler content between 0 and 50 wt%. An increase in permeability and a decrease in vapor selectivity was measured with increasing filler content. The free volume sizes and interstitial mesopore sizes of the composites were determined by use of positron annihilation lifetime spectroscopy (PALS). In addition to an increase in large free volume size with increasing filler content, interstitial mesopores were observed in all PTMSP/silica nanocomposites. The size of these interstitial cavities, located between the particles of a silica agglomerate, was increasing with increasing filler concentration. The presence of these agglomerates was visualized by TEM. The existence of the cavities was confirmed by nitrogen adsorption measurements. The hydrogen, nitrogen and propane permeability was clearly correlated with the size of the interstitial mesopores. (c) 2005 Elsevier B.V. All rights reserved.
Notes: Vlaamse Instelling Technol Onderzoek, Flemish Inst Technol Res, B-2400 Mol, Belgium. Katholieke Univ Leuven, Fac Biosci Engn, Ctr Surface Chem & Catalysis COK, B-3001 Heverlee, Belgium. Lund Univ, Lund Inst Technol, Dept Polymer Sci & Engn, SE-22100 Lund, Sweden. Hasselt Univ, Mat Res Inst, B-3590 Diepenbeek, Belgium. IMEC VZW, Div IMOMEC, B-3590 Diepenbeek, Belgium.De Sitter, K, Vlaamse Instelling Technol Onderzoek, Flemish Inst Technol Res, Boeretang 200, B-2400 Mol, Belgium.kristien.desitter@vito.be
URI: http://hdl.handle.net/1942/1954
DOI: 10.1016/j.desal.2006.03.174
ISI #: 000238409300010
ISSN: 0376-7388
Category: A1
Type: Journal Contribution
Validation: ecoom, 2007
Appears in Collections: Research publications

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