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Title: Method for rapidly producing microporous and mesoporous materials

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.
 [1];  [1];  [2];  [3]
  1. (Livermore, CA)
  2. (Pleasanton, CA)
  3. (Danville, CA)
Issue Date:
OSTI Identifier:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5686031
Contract Number:
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
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/