Organic aerogels from the sol-gel polymerization of phenolic-furfural mixtures

Title: Organic aerogels from the sol-gel polymerization of phenolic-furfural mixtures

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The sol-gel polymerization of a phenolic-furfural mixture in dilute solution leads to a highly cross-linked network that can be supercritically dried to form a high surface area foam. These porous materials have cell/pore sizes{<=}1000{angstrom}, and although they are dark brown in color, they can be classified as a new type of aerogel. The phenolic-furfural aerogel can be pyrolyzed in an inert atmosphere at 1050 C to produce carbon aerogels. This new aerogel may be used for thermal insulation, chromatographic packing, water filtration, ion-exchange, and carbon electrodes for energy storage devices, such as batteries and double-layer capacitors. 8 figs.

Inventors:: Pekala, R.W.

Issue Date:: 1995-12-19

OSTI Identifier:: 170453

Assignee:: Univ. of California, Oakland, CA (United States) PTO; SCA: 360601; 250903; 250400; PA: EDB-96:028246; SN: 96001517614

Patent Number(s):: US 5,476,878/A/

Application Number:: PAN: 8-307,219

Contract Number:: W-7405-ENG-48

Resource Relation:: Other Information: PBD: 19 Dec 1995

Research Org:: University of California

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 25 ENERGY STORAGE; PHENOLS; POLYMERIZATION; FURFURAL; FOAMS; PRODUCTION; USES; CAPACITIVE ENERGY STORAGE EQUIPMENT; ELECTRODES; ELECTRIC BATTERIES; SOL-GEL PROCESS; PORE STRUCTURE; PYROLYSIS; FILTERS; PACKINGS; ION EXCHANGE MATERIALS

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Organic aerogels from the sol-gel polymerization of phenolic-furfural mixtures

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The sol-gel polymerization of a phenolic-furfural mixture in dilute solution leads to a highly cross-linked network that can be supercritically dried to form a high surface area foam. These porous materials have cell/pore sizes {<=}1,000{angstrom}, and although they are dark brown in color, they can be classified as a new type of aerogel. The phenolic-furfural aerogel can be pyrolyzed in an inert atmosphere at 1,050 C to produce carbon aerogels. This new aerogel may be used for thermal insulation, chromatographic packing, water filtration, ion-exchange, and carbon electrodes for energy storage devices, such as batteries and double-layer capacitors. 8 figs.
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The sol-gel polymerization of a phenolic-furfural mixture in dilute solution leads to a highly cross-linked network that can be supercritically dried to form a high surface area foam. These porous materials have cell/pore sizes .ltoreq.1000.ANG., and although they are dark brown in color, they can be classified as a new type of aerogel. The phenolic-furfural aerogel can be pyrolyzed in an inert atmosphere at 1050.degree. C. to produce carbon aerogels. This new aerogel may be used for thermal insulation, chromatographic packing, water filtration, ion-exchange, and carbon electrodes for energy storage devices, such as batteries and double-layer capacitors.
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The sol-gel polymerization of a phenolic-furfural mixture in dilute solution leads to a highly cross-linked network that can be supercritically dried to form a high surface area foam. These porous materials have cell/pore sizes .ltoreq.1000 .ANG., and although they are dark brown in color, they can be classified as a new type of aerogel. The phenolic-furfural aerogel can be pyrolyzed in an inert atmosphere at 1050.degree. C. to produce carbon aerogels. This new aerogel may be used for thermal insulation, chromatographic packing, water filtration, ion-exchange, and carbon electrodes for energy storage devices, such as batteries and double-layer capacitors.
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