Low density, resorcinol-formaldehyde aerogels
Abstract
The polycondensation of resorcinol with formaldehyde under alkaline conditions results in the formation of surface functionalized polymer ''clusters''. The covalent crosslinking of these ''clusters'' produces gels which when processed under supercritical conditions, produce low density, organic aerogels (density less than or equal to100 mg/cc; cell size less than or equal to0.1 microns). The aerogels are transparent,dark red in color and consist of interconnected colloidal-like particles with diameters of about 100 A/degree/. These aerogels may be further carbonized to form low density carbon foams with cell size of about 0.1 micron. 1 fig., 1 tab.
- Inventors:
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 6291725
- Patent Number(s):
- 7199404
- Application Number:
- ON: DE89009650
- Assignee:
- Dept. of Energy
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; FORMALDEHYDE; SYNTHESIS; GELS; RESORCINOL; CROSS-LINKING; DENSITY; FOAMS; INVENTIONS; MECHANICAL PROPERTIES; POROSITY; SODIUM CARBONATES; SOL-GEL PROCESS; ALDEHYDES; ALKALI METAL COMPOUNDS; AROMATICS; CARBON COMPOUNDS; CARBONATES; CHEMICAL REACTIONS; COLLOIDS; DEVELOPERS; DISPERSIONS; HYDROXY COMPOUNDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHENOLS; PHYSICAL PROPERTIES; POLYMERIZATION; POLYPHENOLS; SODIUM COMPOUNDS; 360601* - Other Materials- Preparation & Manufacture
Citation Formats
Pekala, R. W. Low density, resorcinol-formaldehyde aerogels. United States: N. p., 1988.
Web.
Pekala, R. W. Low density, resorcinol-formaldehyde aerogels. United States.
Pekala, R. W. Thu .
"Low density, resorcinol-formaldehyde aerogels". United States. https://www.osti.gov/servlets/purl/6291725.
@article{osti_6291725,
title = {Low density, resorcinol-formaldehyde aerogels},
author = {Pekala, R. W.},
abstractNote = {The polycondensation of resorcinol with formaldehyde under alkaline conditions results in the formation of surface functionalized polymer ''clusters''. The covalent crosslinking of these ''clusters'' produces gels which when processed under supercritical conditions, produce low density, organic aerogels (density less than or equal to100 mg/cc; cell size less than or equal to0.1 microns). The aerogels are transparent,dark red in color and consist of interconnected colloidal-like particles with diameters of about 100 A/degree/. These aerogels may be further carbonized to form low density carbon foams with cell size of about 0.1 micron. 1 fig., 1 tab.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {5}
}
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