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Selective Matrimid Membranes Containing Mesoporous Molecular Sieves

Published online by Cambridge University Press:  11 February 2011

Kenneth J. Balkus Jr ,
Kyle Cattanach ,
Inga H. Musselman  and
John P. Ferraris
Kenneth J. Balkus Jr
Affiliation:
University of Texas at Dallas, Department of Chemistry and the UTD NanoTech Institute, Richardson, TX 75083–0688
Kyle Cattanach
Affiliation:
University of Texas at Dallas, Department of Chemistry and the UTD NanoTech Institute, Richardson, TX 75083–0688
Inga H. Musselman
Affiliation:
University of Texas at Dallas, Department of Chemistry and the UTD NanoTech Institute, Richardson, TX 75083–0688
John P. Ferraris
Affiliation:
University of Texas at Dallas, Department of Chemistry and the UTD NanoTech Institute, Richardson, TX 75083–0688
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Abstract

We have employed mesoporous molecular sieves in polymer membranes in an effort to enhance the permselectivity. The principal advantage of these materials is that the polymer chains can penetrate the pores reducing the nonselective voids that are often observed with inorganic additives. In this study, we have prepared Matrimid® membranes with various loadings of the all silica molecular sieve DAM-1 (Dallas Amorphous Material) as well as DAM-1 functionalized with amines in the channel wall, to enhance the gas permeability characteristics of a high performance polymer. For all gases tested (N2, O2, CO2, CH4), the permeability increased in proportion to the wt % of the amine DAM-1 present in the membrane. The addition of the amine DAM-1 resulted in modest ideal O2/N2 permselectivity, while the ideal CO2/CH4 permselectivity values were >100, depending upon the moisture content of the feed. The ideal CO2/CH4 permselectivity values are among the highest for this type of composite membrane. Details of membrane fabrication as well as permeability and permselectivity results will be presented for a range of Matrimid®/molecular sieve composites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 752: Symposium AA – Membranes–Preparation, Properties and Applications , 2002 , AA4.3
Copyright
Copyright © Materials Research Society 2003

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