Investigation on conductivity of mixed surfactants reverse microemulsion

Abstract

P-octyl polyethylene glycol phenyl ether (Triton X-100) and cetyltrimethylammonium bromide (CTAB) were mixed to be used as surfactant for preparing reverse microemulsion with n-hexane, n-hexanol and water. Effects of weight ratio of the two surfactants, temperature, concentrations of water and cosurfactant on the conductivity were studied. The results indicate that the conductivity of the mixed surfactants reverse microemulsion is greatly higher than that of the single surfactant system. The reverse microemulsion has been modified to be with good conductivity. The weight ratio of the two surfactants, temperature, concentrations of water and cosurfactant have obvious effects on the conductivity of the reverse microemulsion. Furthermore, the electrochemical behavior of potassium ferricyanide [K 3 Fe(CN) 6 ] in the mixed surfactants reverse microemulsion was investigated by cyclic voltammetry. The result shows that the redox processes of Fe CN ð Þ 6 3À =Fe CN ð Þ 6 4À present good reversibility and are controlled by diffusion in the system.

Electron Transfer in Microemulsion-Based Electrolytes

“…Note that the mechanism proposed here, while strongly associated with the specific structure of the surfactant, could be more general. Many electrochemical studies in microemulsions have focused on systems such as sodium dodecyl sulfate (SDS) , or cetyltrimethylammonium bromide (CTAB), which have compact anionic and cationic head groups and some show fairly high rates of electron transfer, though to our knowledge there are few literature reports in which researchers have extended voltammetric scan rates to those used here. (An important exception is the work by the Rusling group in ref ).…”

Conductive microemulsions for template CoNi electrodeposition

“…Some authors have attributed the conductivity of W/O microemulsions with nonionic surfactant Triton X-100 to the presence of ionic impurities in the surfactant or to the surface charge of ions in the droplet surface. [18][19][20] In a previous work in our laboratory, electrodeposition from microemulsions of an aqueous solution-surfactantoil system has been tested and a relation between appropriate conductivity of the system and bicontinuous microemulsion formation has been demonstrated. 21 The aim of the present work is to describe a systematic study to select conductive microemulsions in the aqueous solutionsurfactant-oil system and to detect the better microemulsions in which electrodeposition of patterned magnetic alloys could be feasible.…”