Line tension and wetting behavior of an air/hexadecane/aqueous surfactant system.
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.
Takata
Youichi
Y
Department 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
Matsubara
Hiroki
H
Kikuchi
Yoshimori
Y
Ikeda
Norihiro
N
Matsuda
Takashi
T
Takiue
Takanori
T
Aratono
Makoto
M
D000388:Air; D000473:Alkanes / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature; D013718:Tensile Strength; D014867:Water / Q000737:chemistry; D017155:Wettability
D000473:Alkanes; D000644:Quaternary Ammonium Compounds; D012996:Solutions; D013501:Surface-Active Agents; D014867:Water; C007932:n-hexadecane; C022806:dodecyltrimethylammonium