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
• Resource Relation: Patent File Date: 26 May 1988
• Country of Publication: United States
• Language: English

Related Subjects

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