Silicon-modified carbohydrate surfactants IX: dynamic wetting of a perfluorinated solid surface by solutions of a siloxane surfactant above and below the critical micelle concentration

✍ Scribed by R. Wagner; Y. Wu; L. Richter; S. Siegel; J. Weissmüller; J. Reiners

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 166 KB
• Volume: 12
• Category: Article
• ISSN: 0268-2605
• DOI: 10.1002/(sici)1099-0739(199812)12:12<843::aid-aoc800>3.0.co;2-o

✦ Synopsis

The dynamic wetting behaviour on a perfluorinated, low-energy solid has been investigated for a carbohydrate-modified phenylsiloxane surfactant. The surfactant concentration, the rate of interface generation and the [solid/liquid interface area] : [liquid/vapour interface area] ratio were varied systematically. Dynamic data for the liquid/vapour (g lv ) and solid/liquid (g sl ) interfacial tension as well as their Lifshitz-van der Waals and donor-acceptor contributions were determined under strictly controlled conditions. Since g sl reacts sensitively to variations of the surfactant concentration and the rate of interface generation, the covering of the liquid/nonpolar solid interface is assumed to be a spreading limiting factor. The corresponding g lv values remain constant and close to those obtained under equilibrium conditions.