Silicon-modified carbohydrate surfactants VIII. Equilibrium wetting of perfluorinated solid surfaces by solutions of surfactants above and below the critical micelle concentration—surfactant distribution between liquid–vapour and solid–liquid interfaces

✍ Scribed by R. Wagner; Y. Wu; L. Richter; J. Reiners; J. Weissmüller; A. de Montigny

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 111 KB
• Volume: 13
• Category: Article
• ISSN: 0268-2605
• DOI: 10.1002/(sici)1099-0739(199901)13:1<21::aid-aoc799>3.0.co;2-v

✦ Synopsis

For selected carbohydrate-modified Silicon surfactants of the siloxane, carbosilane, polysilane and silane type, the concentration dependences of the liquid/vapour and solid/liquid interfacial tensions under equilibrium conditions have been determined. Further, the Lifshitz-van der Waals and donor-acceptor contributions have been calculated. Below the critical micelle concentration (cmc) a steep increase in donor-acceptor contributions to both interfacial tensions was found. The Lifshitz-van der Waals contribution of the liquid/vapour interfacial tension shows a pronounced minimum. Calculations of the concentration-dependent surface coverage suggest that preferential adsorption to one of the interfaces does not take place.