Abstract
The model developed in Part I is applied to nitrogen adsorption isotherms obtained for a series of silica aerogels whose densities are varied by partial sintering. The isotherms are adequately described by a cubic network model, with all of the pores falling in the mesopore range; the adsorption and desorption branches are fit by the same pore size distribution. For the least dense gels, a substantial portion of the pore volume is not detected by condensation. The model attributes this effect to the shape of the adsorbate/adsorptive interface, which can adopt zero curvature even in mesopores, because of the shape of the network.
Original language | English (US) |
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Pages (from-to) | 411-416 |
Number of pages | 6 |
Journal | Journal of Colloid And Interface Science |
Volume | 202 |
Issue number | 2 |
DOIs | |
State | Published - Jun 15 1998 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Surfaces, Coatings and Films
- Colloid and Surface Chemistry
Keywords
- Adsorption
- Aerogel
- Condensation
- Curvature
- Network
- Silica
- Sintering