Low density, resorcinol-formaldehyde aerogels

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867734

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.circle.. 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 (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4997804
• OSTI ID: 867734
• Country of Publication: United States
• Language: English

Related Subjects

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
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