Phase Transition of the Adsorbed Film of 1,1,2,2-Tetrahydroperfluorododecanol at the Hexane/Water Interface

• Published in: Journal of colloid and interface science Vol. 172; no. 1; pp. 142 - 146
• Main Authors: Hayami, Yoshiteru, Uemura, Akira, Ikeda, Norihiro, Aratono, Makoto, Motomura, Kinsi
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.06.1995; Elsevier
• Subjects: adsorbed film; Chemistry; condensed film; Exact sciences and technology; fluorododecanol; Gas-liquid interface and liquid-liquid interface; gaseous film; General and physical chemistry; interfacial tension; phase transition; Surface physical chemistry; thermodynamic quantity; adsorbed film; interfacial tension; thermodynamic quantity; fluorododecanol; condensed film; gaseous film; phase transition; Temperature; Hydrocarbon; Interface tension; Experimental study; Primary alcohol; Interface properties; Phase transformation; Medium effect; Adsorbed state; Liquid liquid interface; Hexane; Aqueous solution; Thermodynamic properties; Phase equilibrium
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1006/jcis.1995.1236

The interfacial tension of the hexane solution of 1,1,2,2-tetrahydroperfluorododecanol (FC12OH) against water was measured as a function of temperature and concentration under atmospheric pressure. The break point indicating a phase transition of the adsorbed film was seen on the interfacial tension vs temperature and concentration curves. The thermodynamic quantity changes associated with the adsorption were evaluated by applying thermodynamic relations; they were observed to change discontinuously at the transition point. By comparing this behavior with that of tetradecanol and octadecanol, the adsorbed film of FC12OH was concluded to be transformed from a gaseous to a condensed state.