Mixing behavior of fluorinated and hydrogenated gemini surfactants at the air-water interface

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:284

Article

Nishida, J ; Brizard, A ; Desbat, B ; Oda, R

关键词: fluorinated surfactant;    Brewster angle microscope;    mixing behavior of monolayer;    air-water interface;   

DOI  :  10.1016/j.jcis.2004.09.060

来源: Elsevier

【 摘 要 】

Mixing behavior of hydrogenated and fluorinated cationic gemini surfactants was studied at the air-water interface by Brewster angle microscopy and pi-A isotherm curves. In the bulk, these two molecules did not mix and showed phase separation. At the air-water interface, if a monolayer was formed by separate deposition of the two solutions, they formed separate domains, and the compression occurred in two steps: first the domains with hydrogenated gemini surfactant were compressed until they showed collapse; then the domains with fluorinated gemini surfactant were compressed. If the two solutions were mixed before the deposition, they remained mixed upon compression; on the other hand, separate domains under separate deposition were shown to mix if the subphase was heated. (c) 2004 Elsevier Inc. All rights reserved.

【 授权许可】

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