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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.ltoreq.100 mg/cc; cell size .ltoreq.0.1 microns). The aerogels are transparent, dark red in color and consist of interconnected colloidal-like particles with diameters of about 100.circle.. These aerogels may be further carbonized to form low density carbon foams with cell size of about 0.1 micron.

Inventors:
 [1]
  1. Pleasant Hill, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
867734
Patent Number(s):
4997804
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
density; resorcinol-formaldehyde; aerogels; polycondensation; resorcinol; formaldehyde; alkaline; conditions; results; formation; surface; functionalized; polymer; clusters; covalent; crosslinking; produces; gels; processed; supercritical; produce; organic; ltoreq; 100; mg; cc; cell; size; microns; transparent; dark; color; consist; interconnected; colloidal-like; particles; diameters; circle; carbonized; form; carbon; foams; micron; supercritical conditions; organic aerogels; carbon foam; cell size; carbon foams; alkaline condition; organic aerogel; resorcinol-formaldehyde aerogels; density carbon; surface functionalized; functionalized polymer; surface functional; produces gels; alkaline conditions; conditions results; covalent crosslinking; /502/521/

Citation Formats

Pekala, Richard W. Low density, resorcinol-formaldehyde aerogels. United States: N. p., 1991. Web.
Pekala, Richard W. Low density, resorcinol-formaldehyde aerogels. United States.
Pekala, Richard W. Tue . "Low density, resorcinol-formaldehyde aerogels". United States. https://www.osti.gov/servlets/purl/867734.
@article{osti_867734,
title = {Low density, resorcinol-formaldehyde aerogels},
author = {Pekala, Richard 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.ltoreq.100 mg/cc; cell size .ltoreq.0.1 microns). The aerogels are transparent, dark red in color and consist of interconnected colloidal-like particles with diameters of about 100.circle.. 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 = {1991},
month = {1}
}

Patent:

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