Low density, resorcinol-formaldehyde aerogels

Patent · Tue Oct 10 00:00:00 EDT 1989

OSTI ID:7070108

Pekala, R W

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.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 4873218; A
• Application Number: PPN: US 7-199404
• OSTI ID: 7070108
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical &amp; Physicochemical Properties
ALDEHYDES
AROMATICS
CARBONIZATION
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DEHYDROCYCLIZATION
DEVELOPERS
DISPERSIONS
FOAMS
FORMALDEHYDE
GELS
HYDROXY COMPOUNDS
MICROSTRUCTURE
ORGANIC COMPOUNDS
PHENOLS
POLYMERIZATION
POLYPHENOLS
PORE STRUCTURE
RESORCINOL
SYNTHESIS