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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
Author(s) -
Wagner R.,
Wu Y.,
Richter L.,
Reiners J.,
Weissmüller J.,
de Montigny A.
Publication year - 1999
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199901)13:1<21::aid-aoc799>3.0.co;2-v
Subject(s) - chemistry , critical micelle concentration , wetting , silane , van der waals force , pulmonary surfactant , adsorption , surface tension , micelle , siloxane , silicon , chemical engineering , organic chemistry , thermodynamics , molecule , polymer , biochemistry , physics , aqueous solution , engineering
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. Copyright © 1999 John Wiley & Sons, Ltd.