ADSORPTION-ISOTHERMS OF PERFLUOROCARBON SURFACTANTS FROM AQUEOUS AND NONAQUEOUS SOLUTIONS AND FRICTION MEASUREMENTS OF PERFLUOROSURFACTANT-ADSORBED ALUMINA

Authors
LAI CL HARWELL JH OREAR EA KOMATSUZAKI S ARAI J NAKAKAWAJI T ITO Y
Citation
Cl. Lai et al., ADSORPTION-ISOTHERMS OF PERFLUOROCARBON SURFACTANTS FROM AQUEOUS AND NONAQUEOUS SOLUTIONS AND FRICTION MEASUREMENTS OF PERFLUOROSURFACTANT-ADSORBED ALUMINA, Colloids and surfaces. A, Physicochemical and engineering aspects, 104(2-3), 1995, pp. 231-241
Citations number
25
Categorie Soggetti
Chemistry Physical
Journal title
Colloids and surfaces. A, Physicochemical and engineering aspects → ACNP
ISSN journal
09277757
Volume
104
Issue
2-3
Year of publication
1995
Pages
231 - 241
Database
ISI
SICI code
0927-7757(1995)104:2-3<231:AOPSFA>2.0.ZU;2-P
Abstract
The adsorption of a series of perfluorocarbon surfactants C(n)F2(n+1)C OONa (n = 6, 7, and 8) and CnF2n+1COOH (n = 6, 7, and 8) on aluminum o xide surfaces has been studied experimentally. Isotherms from aqueous and non-aqueous solutions, respectively, were measured, and the effect s of pH and fluorocarbon chain length on the adsorption behavior and t he maximum level of adsorption determined. Contact angles and friction coefficients for adsorbed films of surfactant on alumina chips were a lso measured as a function of pH and surfactant concentration. Frictio n coefficients were reduced while contact angles increased.