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 [<=]100 mg/cc; cell size [<=]0.1 microns). The aerogels are transparent, dark red in color and consist of interconnected colloidal-like particles with diameters of about 100 [angstrom]. These aerogels may be further carbonized to form low density carbon foams with cell size of about 0.1 micron.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7070108
- Patent Number(s):
- 4873218
- Application Number:
- PPN: US 7-199404
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 26 May 1988
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; FOAMS; SYNTHESIS; FORMALDEHYDE; DEHYDROCYCLIZATION; POLYMERIZATION; GELS; CARBONIZATION; RESORCINOL; PORE STRUCTURE; ALDEHYDES; AROMATICS; CHEMICAL REACTIONS; COLLOIDS; DECOMPOSITION; DEVELOPERS; DISPERSIONS; HYDROXY COMPOUNDS; MICROSTRUCTURE; ORGANIC COMPOUNDS; PHENOLS; POLYPHENOLS; 400201* - Chemical & Physicochemical Properties
Citation Formats
Pekala, R W. Low density, resorcinol-formaldehyde aerogels. United States: N. p., 1989.
Web.
Pekala, R W. Low density, resorcinol-formaldehyde aerogels. United States.
Pekala, R W. Tue .
"Low density, resorcinol-formaldehyde aerogels". United States.
@article{osti_7070108,
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 [<=]100 mg/cc; cell size [<=]0.1 microns). The aerogels are transparent, dark red in color and consist of interconnected colloidal-like particles with diameters of about 100 [angstrom]. These aerogels may be further carbonized to form low density carbon foams with cell size of about 0.1 micron.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 10 00:00:00 EDT 1989},
month = {Tue Oct 10 00:00:00 EDT 1989}
}
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