引用本文:
Wei Zhou, Wei Da Xu, Yu Mei Sun, Ya Wen Zhou. Phases confirmation of cloudy Silwet L-77 aqueous solution by dielectric relaxation spectroscopy[J]. Chinese Chemical Letters,
2010, 21(6): 734-737.
doi:
10.1016/j.cclet.2010.01.026
Citation: Wei Zhou, Wei Da Xu, Yu Mei Sun, Ya Wen Zhou. Phases confirmation of cloudy Silwet L-77 aqueous solution by dielectric relaxation spectroscopy[J]. Chinese Chemical Letters, 2010, 21(6): 734-737. doi: 10.1016/j.cclet.2010.01.026
Citation: Wei Zhou, Wei Da Xu, Yu Mei Sun, Ya Wen Zhou. Phases confirmation of cloudy Silwet L-77 aqueous solution by dielectric relaxation spectroscopy[J]. Chinese Chemical Letters, 2010, 21(6): 734-737. doi: 10.1016/j.cclet.2010.01.026
Phases confirmation of cloudy Silwet L-77 aqueous solution by dielectric relaxation spectroscopy
摘要:
The phase transition of Silwet L-77 (a kind of siloxane surfactant) dilute aqueous solution with temperature was investigated by dielectric relaxation spectroscopy. In the initial heating process, a dielectric relaxation was found at about 106 Hz, which was considered as the interface polarization ascribed to the interface between water and liquid phases (W and L1). With the temperature increasing further, a new dielectric relaxation was observed at about 104 Hz, which was assigned to the appearance of liquid crystal phase (Lα). According to the dielectric parameters fitted by Cole-Cole equation, the coexistence temperature of W, L1 and Lα was determined at about 37.0℃.
English
Phases confirmation of cloudy Silwet L-77 aqueous solution by dielectric relaxation spectroscopy
Abstract:
The phase transition of Silwet L-77 (a kind of siloxane surfactant) dilute aqueous solution with temperature was investigated by dielectric relaxation spectroscopy. In the initial heating process, a dielectric relaxation was found at about 106 Hz, which was considered as the interface polarization ascribed to the interface between water and liquid phases (W and L1). With the temperature increasing further, a new dielectric relaxation was observed at about 104 Hz, which was assigned to the appearance of liquid crystal phase (Lα). According to the dielectric parameters fitted by Cole-Cole equation, the coexistence temperature of W, L1 and Lα was determined at about 37.0℃.
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Key words:
- Dielectric relaxation
- / Silwet L-77
- / Phase transition
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