광산란 방법에 의한 미셀용액의 가용화 연구

A study on the Solubilization in Micellar Solution by Dynamic Light Scattering

The mean gyration radii, Rg of elongated micelles and solubilizate incorporated micelle of sodium dodecyl sulfate(SDS) were measured using angular dissymmetry of the dynamically scattered light. The solubilizates were : benzene, naphthalene and anthracene. The measurements were performed at low NaCl concentration(0.05M) and high NaCl concentration(0.30M) at temperatures, 25°C, 30°C and 40°C. The measured Rg values were also compared with the theoretically derived values on the curves of the angular dissymmetry, (d(θ)) versus the cos θ of the solubilized SDS micelle. The SDS micelles added by NaCl and solubilizate molecules such as aromatic compounds are shown to behave thin rod-like between 228A and 579A in length, and flexible bended rod-like between 621A and 1059A in length, as the temperature goes down form 40°C to 25°C. As a result, the non-rigid SDS micelles transform gradually from sphere via prolate ellipsoid to thin rod-like and flexible bended rod-like micelles as the electrolyte and solubilizate molesules are added and the temperature is lowered.