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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
Author(s) -
Wagner R.,
Wu Y.,
Richter L.,
Siegel S.,
Weissmüller J.,
Reiners J.
Publication year - 1998
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(199812)12:12<843::aid-aoc800>3.0.co;2-o
Subject(s) - chemistry , pulmonary surfactant , wetting , surface tension , critical micelle concentration , chemical engineering , siloxane , van der waals force , activation energy , micelle , organic chemistry , thermodynamics , aqueous solution , molecule , polymer , biochemistry , physics , engineering
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 (γ lv ) and solid/liquid (γ sl ) interfacial tension as well as their Lifshitz–van der Waals and donor–acceptor contributions were determined under strictly controlled conditions. Since γ sl reacts sensitively to variations of the surfactant concentration and the rate of interface generation, the covering of the liquid/non‐polar solid interface is assumed to be a spreading limiting factor. The corresponding γ lv values remain constant and close to those obtained under equilibrium conditions. Copyright © 1998 John Wiley & Sons, Ltd.