Low density, resorcinol-formaldehyde aerogels

Patent · Sat Dec 31 23:00:00 EST 1988

OSTI ID:867129

Pekala, Richard W ^[1]

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1. Pleasant Hill, CA

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 .ANG.. These aerogels may be further carbonized to form low density carbon foams with cell size of about 0.1 micron.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States Department of Energy (WA)
• Patent Number(s): US 4873218
• OSTI ID: 867129
• Country of Publication: United States
• Language: English

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100
aerogels
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ang
carbon
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carbon foams
carbonized
cc
cell
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clusters
colloidal-like
color
conditions
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consist
covalent
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dark
density
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diameters
foams
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gels
interconnected
ltoreq
mg
micron
microns
organic
organic aerogel
organic aerogels
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polycondensation
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produce
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resorcinol
resorcinol-formaldehyde
resorcinol-formaldehyde aerogels
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surface
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surface functionalized
transparent