Abstract: The effect ofβ-CD on the properties of SDS micelle was studied by the determination of the diffusion coefficient D and the aggregation number N of SDS micelle,and the distribution coefficient ofβ-CD between the micellar phase and the continuous water phase. The results show that the distribution ofβ-CD in the micellar phase increases and the diffusion coefficient D and the aggregation number N will decrease with addedβ-CDwhen the concentration ofβ-CD is lower. The distribution ofβ-CD in the continuous water phase increases and the influence ofβ-CD on D and N are reduced remarkably when the concentration ofβ-CD is higher. When the SDS concentration is less than the first CMC,the inclusion compounds ofβ-CD with SDS monomer form in the molecular ratio of 1∶1. Mixed spherical micelle could be prepared in the molecular ratio of 1:8 forβ-CD/SDS when the SDS concentration is higher than the first CMC.

Key words: β-CD, Diffusion coefficient, Aggregation number, Binding constant, 　Distribution coefficient