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在无外加探针条件下用循环伏安法测定了不同形状Triton X-100胶束的扩散系数,得到第一cmc(临界胶束浓度)为3.1×10~(-4)mol·L~(-1),第二cmc为1.3×10~(-3)mol·L~(-1),并给出了Triton X-100的电化学反应机理.随正丁醇含量的增加,Triton X-100球形胶束的扩散系数迅速增加,正丁醇的增溶分数略有降低,但胶束内微极性却降低较多;棒状胶束转变为球形胶束,正丁醇的增溶分数基本不变,但胶束内微极性降低.随温度升高,Triton X-100分子与胶束的扩散系数均增加.正丁醇含量<1.5％时,扩散活化能E_D随正丁醇含量增加而迅速增加;但正丁醇含量>1.5％时,E_D增加变缓.
The diffusion coefficients of Triton X-100 micelles with different shapes were measured by cyclic voltammetry under the condition of no probe addition. The first cmc (critical micelle concentration) was 3.1 × 10 ~ (-4) mol·L ~ (-1) -1) and the second cmc was 1.3 × 10 -3 mol·L -1, and the electrochemical reaction mechanism of Triton X-100 was given.With the increase of n-butanol content, Triton X- 100 spherical micelles increased rapidly while the solubilization fraction of n-butanol decreased slightly, but the micropolarity in the micelles decreased more. The micelles transformed into spherical micelles and the solubilization fraction of n-butanol But the micropolarity in the micelles decreased.With the increase of temperature, the diffusion coefficient of Triton X-100 molecules and micelles increased.When n-butanol content was less than 1.5%, the diffusion activation energy E_D increased with n-butanol content But increased rapidly; but when the n-butanol content was> 1.5%, the E_D increased slowly.