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Title: Organic aerogel microspheres and fabrication method therefor

Organic aerogel microspheres which can be used in capacitors, batteries, thermal insulation, adsorption/filtration media, and chromatographic packings, having diameters ranging from about 1 micron to about 3 mm. The microspheres can be pyrolyzed to form carbon aerogel microspheres. This method involves stirring the aqueous organic phase in mineral oil at elevated temperature until the dispersed organic phase polymerizes and forms nonsticky gel spheres. The size of the microspheres depends on the collision rate of the liquid droplets and the reaction rate of the monomers from which the aqueous solution is formed. The collision rate is governed by the volume ratio of the aqueous solution to the mineral oil and the shear rate, while the reaction rate is governed by the chemical formulation and the curing temperature.
Inventors:
 [1];  [2];  [3];  [2]
  1. (San Leandro, CA)
  2. (Pleasanton, CA)
  3. (Pleasant Hill, CA)
Issue Date:
OSTI Identifier:
870378
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5508341
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
organic; aerogel; microspheres; fabrication; method; capacitors; batteries; thermal; insulation; adsorption; filtration; media; chromatographic; packings; diameters; ranging; micron; pyrolyzed; form; carbon; involves; stirring; aqueous; phase; mineral; oil; elevated; temperature; dispersed; polymerizes; forms; nonsticky; spheres; size; depends; collision; rate; liquid; droplets; reaction; monomers; solution; formed; governed; volume; ratio; shear; chemical; formulation; curing; mineral oil; collision rate; fabrication method; reaction rate; volume ratio; aerogel microspheres; thermal insulation; organic phase; method involves; aqueous solution; elevated temperature; carbon aerogel; form carbon; chemical formula; aqueous organic; chromatographic packing; organic aerogel; liquid droplet; shear rate; chromatographic packings; method involve; liquid droplets; diameters ranging; filtration media; liquid drop; /524/521/523/