Abstract

The effects of alkyl chain lengths in sodium alkyl sulfates (SCN) and n-alkanes (ACN) on the phase equilibrium rate of middle-phase microemulsion have been investigated. The phase equilibrating rate at optimum salinity, at which middle-phase microemulsion forms, increased with decreasing SCN, or with increasing ACN. This may be attributed to the fact that phase equilibrating rate is closely related to removal rate of excess solubilized water and/or oil in the middle phase, that is, the removal rate increases with a decrease in the magnitude of individual strengths of hydrophilic and hydrophobic interactions at oil/water interface.

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