Effect of β-CD on the formation and the properties of SDS micelle

The effect of beta -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 of beta -CD between the micellar phase and the continuous water phase. The results show that the distribution of beta -CD in the micellar phase increases and the diffusion coefficient D and the aggregation number N will decrease with added beta -CD when the concentration of beta -CD is lower. The distribution of beta -CD in the continuous water phase increases and the influence of beta -CD on D and N are reduced remarkably when the concentration of beta -CD is higher. When the SDS concentration is less than the first CMC, the inclusion compounds of beta -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 for beta -CD/SDS when the SDS concentration is higher than the first CMC.