In this work, the cationic surfactant hexacetyl pridinium chloride (HCPC) was blended with anionic surfactant Sodium Dodecyl benzene  Sulfate (SDBS) by using different concentrations (0.0025 - 0.1M) of phenol and at temperature ranges (20-35 Co). It was found that the viscosity values for the mixture of SDBS / HCPC at a certain mixing ratios (12/3, 10.5/4.5 and 9/6), were increased in the presence of phenol, due to formation of self-assembled supramolecular. Moreover, the thermodynamic functions as well as the activation energy for the process of self-assembled were calculated. Conductivity measurements were also performed for further support. The results revealed a physical interaction insight intermolecular forces.