Method for rapidly producing microporous and mesoporous materials
Abstract
An improved, rapid process is provided for making microporous and mesoporous materials, including aerogels and pre-ceramics. A gel or gel precursor is confined in a sealed vessel to prevent structural expansion of the gel during the heating process. This confinement allows the gelation and drying processes to be greatly accelerated, and significantly reduces the time required to produce a dried aerogel compared to conventional methods. Drying may be performed either by subcritical drying with a pressurized fluid to expel the liquid from the gel pores or by supercritical drying. The rates of heating and decompression are significantly higher than for conventional methods.
- Inventors:
-
- Livermore, CA
- Pleasanton, CA
- Danville, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 871221
- Patent Number(s):
- 5686031
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29C - SHAPING OR JOINING OF PLASTICS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; rapidly; producing; microporous; mesoporous; materials; improved; rapid; process; provided; including; aerogels; pre-ceramics; precursor; confined; sealed; vessel; prevent; structural; expansion; heating; confinement; allows; gelation; drying; processes; greatly; accelerated; significantly; reduces; time; required; produce; dried; aerogel; compared; conventional; methods; performed; subcritical; pressurized; fluid; expel; liquid; pores; supercritical; rates; decompression; significantly reduce; time required; conventional methods; porous material; pressurized fluid; porous materials; significantly reduces; producing microporous; mesoporous material; supercritical drying; drying process; heating process; rapid process; mesoporous materials; prevent structural; /264/
Citation Formats
Coronado, Paul R, Poco, John F, Hrubesh, Lawrence W, and Hopper, Robert W. Method for rapidly producing microporous and mesoporous materials. United States: N. p., 1997.
Web.
Coronado, Paul R, Poco, John F, Hrubesh, Lawrence W, & Hopper, Robert W. Method for rapidly producing microporous and mesoporous materials. United States.
Coronado, Paul R, Poco, John F, Hrubesh, Lawrence W, and Hopper, Robert W. Wed .
"Method for rapidly producing microporous and mesoporous materials". United States. https://www.osti.gov/servlets/purl/871221.
@article{osti_871221,
title = {Method for rapidly producing microporous and mesoporous materials},
author = {Coronado, Paul R and Poco, John F and Hrubesh, Lawrence W and Hopper, Robert W},
abstractNote = {An improved, rapid process is provided for making microporous and mesoporous materials, including aerogels and pre-ceramics. A gel or gel precursor is confined in a sealed vessel to prevent structural expansion of the gel during the heating process. This confinement allows the gelation and drying processes to be greatly accelerated, and significantly reduces the time required to produce a dried aerogel compared to conventional methods. Drying may be performed either by subcritical drying with a pressurized fluid to expel the liquid from the gel pores or by supercritical drying. The rates of heating and decompression are significantly higher than for conventional methods.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}
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