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Title: Biofoam

Biofoam is a rigid, opaque microcellular organic foam made from organic materials derived from natural products and biological organisms. Typical organic materials are agar, agarose, gelatin, algin, alginates, gellan gum, and microcrystalline cellulose. The organic material is dissolved in a polar solvent, typically water, and the solution can be gelled immediately. The gel is frozen and freeze-dried to form the biofoam. Alternatively, a nonpolar solvent is added to the solution and emulsified. The resulting emulsion is then gelled, frozen, and freeze-dried. A variety of crystalline, fibrous, or metallic additives may be added to produce lightweight composite materials with enhanced strength and insulating properties. The amount of dilution of the organic material in the solvent(s) determines the density of the resulting biofoams, which ranges from about 1.0 mg/cm[sup 3] to about 500 mg/cm[sup 3]. 4 figures.
Inventors:
Issue Date:
OSTI Identifier:
6620886
Assignee:
University of California, Oakland, CA (United States) PTO; EDB-95-029726
Patent Number(s):
US 5382285; A
Application Number:
PPN: US 8-043300
Contract Number:
W-7405-ENG-48
Resource Relation:
Patent File Date: 6 Apr 1993
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; BIOLOGICAL MATERIALS; GELATION; FOAMS; THERMAL INSULATION; FABRICATION; MECHANICAL PROPERTIES; PHYSICAL PROPERTIES; COLLOIDS; DISPERSIONS; MATERIALS 360600* -- Other Materials; 320107 -- Energy Conservation, Consumption, & Utilization-- Building Systems-- (1987-)

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