Dielectric analysis of the percolation transition in fluorinated water in oil microemulsions

Author

Giri, M. Grazia ; Carlà, Marcello ; Gambi, Cecilia M C ; Senatra, Donatella ; Chittofrati, A. ; Sanguineti, A.

Author_Institution

Dept. of Phys., Florence Univ., Italy

fYear

1996

fDate

15-19 Jul 1996

Firstpage

142

Lastpage

143

Abstract

A dielectric analysis of fluorinated water-in-oil microemulsions was performed in the monophasic region of the phase diagram. Trends typical of percolation phenomena were found as well as trends of non percolating systems. At water to surfactant molar ratio 11, the microemulsions show a percolative behaviour described by scaling laws with exponents mainly typical of dynamic percolation. This implies that the droplets, which have in the dilute regime a hydrodynamic radius of 30 Å and interact via an attractive potential as shown by dynamic light scattering, maintain the structure of dispersed droplets upon an increase of the concentration of temperature

Keywords

insulating oils; microemulsions; percolation; attractive potential; dielectric analysis; droplets; dynamic light scattering; dynamic percolation; fluorinated water-in-oil microemulsion; hydrodynamic radius; percolation transition; phase diagram; scaling law; Aggregates; Dielectrics and electrical insulation; Hydrodynamics; Laboratories; Light scattering; Oil insulation; Performance analysis; Petroleum; Physics; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Dielectric Liquids, 1996, ICDL '96., 12th International Conference on

Conference_Location

Roma

Print_ISBN

0-7803-3560-0

Type

conf

DOI

10.1109/ICDL.1996.565356

Filename

565356