乙醇对SDS胶束扩散系数和反离子缔合度的影响

ETHANOL EFFECTS ON THE DIFFUSION COEFFICIENT AND THE ANTI-ASSOCIATING DEGREE OF SDS MICELLE

在无外加探针条件下,采用循环状安法直接测定 SDS 胶束聚集体在 H_2O 和 C_2H_5OH—H_2O 体系中的扩散系数,用离子计直接测定胶束溶液中的反离子缔合度.测定结果表明:1)随着乙醇的增加,胶束扩散系数增大,反离子缔合度减小;2)在不同 SDS 浓度范围内,乙醇对胶束扩散系数和反离子缔合度的影响程度不同,对各胶束聚集体结构的影响程度也不同.

SDS micelle diffusion coefficient with different micelle shape in H_2O and C_2H_5OH- H_2O systems are determined by cyclic voltammetry without any probe,and anti-ionic associating de- gree is measured by ionometer.The results show:1)With an increasing ethanol content,the diffusion coefficient increases and the associating degree decreases.2)In different SDS concentration scales,the effect of ethanol on the amplitudes of the diffusion coefficient,the associating degree and SDS mieelle structure is different.