Dielectric behavior of highly conducting perfluoropolyether water-in-oil microemulsions

• Published in: IEEE transactions on dielectrics and electrical insulation Vol. 1; no. 4; pp. 716 - 723
• Main Authors: Carla, M., Gambi, C.M.C., Giri, M.G., Pieraccini, L., Senatra, D., Chittofrati, A., Sanguineti, A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.1994; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Chemistry; Colloidal state and disperse state; Conductivity; Dielectric measurements; Electrical, magnetic and optical properties; Emulsions. Microemulsions. Foams; Exact sciences and technology; General and physical chemistry; Impedance; Instruments; Laboratories; Organic polymers; Permittivity; Petroleum; Physicochemistry of polymers; Physics; Properties and characterization; Radio frequency; Water; Temperature dependence; Electrical conductivity; Water oil microemulsion; Experimental study; Permittivity; Dielectric relaxation
• ISSN: 1070-9878; 1558-4135
• DOI: 10.1109/94.311715

The dielectric and conductive properties of a new ternary water-in-oil microemulsion consisting of perfluoropolyether (PFPE) oil, PFPE surfactant and water, were investigated by an impedance analysis technique in the frequency range of 5 Hz to 100 MHz. The trend of both the electrical conductivity and the static permittivity was analyzed as a function of the temperature in the interval from -10 to +40/spl deg/C. Maxwell-Wagner relaxation phenomena in the MHz range and a percolative transition, of dynamic type against temperature, were observed.< >