Gas permeation and microstructure of silica membranes prepared using an organic template approach by sol-gel processing
- Univ. of New Mexico, Albuquerque, NM (United States). Advanced Materials Lab.
This paper investigates microporous amorphous silica membranes prepared using an organic template sol-gel approach. The authors 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.
- Research Organization:
- Sandia National Laboratory
- Sponsoring Organization:
- National Science Foundation, Washington, DC (United States); Gas Research Inst., Chicago, IL (United States); Electric Power Research Inst., Palo Alto, CA (United States); USDOE Morgantown Energy Technology Center, WV (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 462749
- Report Number(s):
- CONF-960401--; ISBN 1-55899-334-7
- Country of Publication:
- United States
- Language:
- English
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