In situ NMR study of gel pore structure during aging and drying

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6844218

Smith, D M; Glaves, C L; Davis, P J; Brinker, C J

Low field NMR spin-lattice relaxation measurements of pore fluid were used to study pore structure during aging and drying of two silica gels. The NMR method provides in situ information concerning pore size, size distribution and surface area which is possible to obtain by other techniques. Surface areas measured for sol-gel sample aged in a potassium hydroxide solution were compared to similar measurements made on an ethanol aged sample during drying. Surface area and pore size distributions of the corresponding final dried gels were measured by both NMR and nitrogen adsorption/condensation. The measurements for a given sample were in good agreement. The surface area of samples before drying were much higher than after drying and the base-aged sample had a higher initial surface area than the ethanol-aged sample although after drying, this trend was reversed. 8 refs., 4 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); New Mexico Univ., Albuquerque (USA). UNM Medical Center
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6844218
• Report Number(s): SAND-88-1659C; CONF-880408-36; ON: DE88012708
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ADSORBENTS
ADSORPTION
AGING
ALCOHOLS
DRYING
ELEMENTS
ETHANOL
HYDROXY COMPOUNDS
MAGNETIC RESONANCE
MEASURING METHODS
NITROGEN
NONMETALS
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
POROSITY
RELAXATION
RESONANCE
SILICA GEL
SORPTION
SPIN-LATTICE RELAXATION
SURFACE AREA
SURFACE PROPERTIES