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Title: 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 Lab., CA (USA)
OSTI Identifier:
6291725
Patent Number(s):
-US-A7199404
Application Number:
ON: DE89009650
Assignee:
Dept. of Energy LLNL; EDB-89-063263
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.
@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}
}