Permeability and structure of resorcinol-formaldehyde gels

Book · Mon Dec 30 23:00:00 EST 1996

OSTI ID:462761

Scherer, G W ^[1]; Alviso, C; Pekala, R; Gross, J ^[2]

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1. Princeton Univ., NJ (United States)
2. Lawrence Livermore National Lab., CA (United States)

The permeability (D) of resorcinol-formaldehyde (RF) gels was measured using a beam-bending technique. For gels made at various solids contents and with different catalyst contents, the permeabilities ranged over a factor of {approximately} 50; the pore radii inferred from D varied from {approximately}3 to 30 nm. Pore radii obtained on RF aerogels using nitrogen desorption were severely affected by compression of the aerogel by capillary forces (resulting from the surface tension of liquid nitrogen). After correction for that effect, the desorption data were found to be in very good agreement with the pore sizes calculated from D.

• OSTI ID: 462761
• Report Number(s): CONF-960401--; ISBN 1-55899-334-7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATALYST SUPPORTS
EXPERIMENTAL DATA
FORMALDEHYDE
GELS
PERMEABILITY
PORE STRUCTURE
RESORCINOL