Diffusion Coefficients and Structure Properties of Triton X-100/ n-C₆H₁₃OH/H₂O System

Abstract

The diffusion coefficients of Triton X-100 micelles with different shape are determined by cyclic voltammetry without any probe. The first CMC (3.2 × 10⁻⁴ mol-L^minus;1) and the second CMC (1.3 × 10^minus;3 mol-L^minus;1) of Triton X-100 micelles arc obtained, and the mechanism of electrochemical reaction for Triton X-100 is deduced, When n-hexanol is added, the diffusion coefficient of Triton X-100 micelles with different shape increases, but the solubilization fraction of n-hexanol decreases in spherical micelles and is almost constant in rodlike ones. However, the micropolarity of micelles decreases in both spherical and rodlike micelles. Furthermore, the diffusion coefficient of Triton X-100 micelles with different shape increases with temperature and the diffusion activation energy increases with n-hexanol content.

Keywords:

• Cyclic Voltammetry
• Diffusion Coefficient
• Micelles
• Micropolarity
• Detergents.