表面活性剂稀溶液中柔性胶束的模拟研究

Simulation Study of Flexible Micelles in Dilute Surfactant Solutions

通过构建微观模型,采用布朗动力学方法模拟表面活性剂溶液内胶束的运动及溶液流变特性。采用线性连接的刚性串粒棒作为胶束的基本单元,通过势作用及阻力分析研究胶束在流场中的受力和运动。模拟表明,添加弯曲势作用的柔性胶束沿轴向线性变长;随持久长度的增长,特征零剪切黏度变大。

Through constructing micro-scale model,the kinetic of micelles in surfactant solution and the corresponding rheological properties are studied numerically by Brownian dynamics simulation. Rigid osculating multibead rods which can be connected at the endcaps are used to represent micelles. By analysis of potential and frictional effect,the force and kinetic of micelles in shear flow held are studied.The simulated results indicate that flexible micelles elongate along the cylindrical axis with addition of bending potential.As the persistence length increases,the characteristic zero-shear viscosity increases.