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Published on: March 18, 2020
Line tension and wetting behavior of an air/hexadecane/aqueous surfactant system
Youichi Takata1, Hiroki Matsubara, Yoshimori Kikuchi
1Department of Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University, Fukuoka 812-8581, Japan. y-takscc@mbox.nc.kyushu-u.ac.jp
Abstract:
The line tension of an air/hexadecane/aqueous solution of an dodecyltrimethylammonium bromide (DTAB) system was measured as a function of the molality of DTAB at 298.15 K by means of a newly constructed apparatus. It was estimated to be on the order of 10(-10)-10(-12) N, which is comparable to the theoretical estimation. Furthermore, its sign was reversed from positive to negative in the vicinity of the wetting transition concentration. The reversal of the sign was examined on the basis of our experimental findings on the wetting transition and the theory of Indekeu.
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