Physical Adsorption of Vapors.
Abstract
The results of several series of investigations are reported. The nature of the ice-vapor interface has been studied at 77K, using nitrogen, argon, and carbon monoxide as adsorbates; at -80C, with ethane and with carbon dioxide; and at -30C to -40C, using n-pentane and n-hexane. At low temperatures, ice-surface is inert and non-polar; at higher temperatures bulk phase reaction may occur with small adsorbate molecules to form the ice clathrate compound; and with larger molecules, surface restructuring may occur. Other molecular solids were studied at 77K, and behave similarly to ice; the adsorbent-adsorbate dispersion interaction is very weak in these systems. Adsorption at the ice-liquid n-hexane interface has been studied. Contact angle data have been obtained for carbon disulfide on ice as a function of temperature. It is proposed that solid-liquid interfaces be classed as A or B in type, depending on whether restructuring of the solid surface occurs. An adsorption model has been developed relating adsorption isotherms to contact angle and spreading behavior. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 27, 1971
- Accession Number
- AD0724740
Entities
People
- Arthur W. Adamson
Organizations
- University of Southern California