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Gas Permeation and Microstructure of Silica Membranes Prepared Using an Organic Template Approach by Sol-Gel Processing

Published online by Cambridge University Press:  10 February 2011

G. Z. Cao  and
C. J. Brinker
G. Z. Cao
Affiliation:
Advanced Materials Laboratory, University of New Mexico and Sandia National Laboratories, 1001 University Blvd. SE, Albuquerque, NM 87106
C. J. Brinker
Affiliation:
Advanced Materials Laboratory, University of New Mexico and Sandia National Laboratories, 1001 University Blvd. SE, Albuquerque, NM 87106
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Abstract

This paper investigates microporous amorphous silica membranes prepared using an organic template sol-gel approach. We find that the introduction of organic methacryloxypropyl ligands results in a reduced average condensation rate and a lower extent of branching that promotes the collapse of the hybrid network upon drying leading to relatively dense hybrid organic-inorganic xerogels and films. Microporous silica xerogels and membranes, prepared by oxidative pyrolysis of the organic templates at 300 °C for 5 hours in oxygen, contained pores with constrictions of approximately 0.35 nm in diameter with a very narrow size distribution, as evidenced by single gas permeation measurements of a series of probe molecules.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 431: Symposium P – Microporous and Macroporous Materials , 1996 , 343
Copyright
Copyright © Materials Research Society 1996

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