星形高分子在油水界面吸附的动态Monte Carlo模拟

用动态M onte Carlo方法,模拟了星形高分子在油水界面的吸附过程,得到了星形高分子在油水界面吸附过程中的一些动态和静态性质,如界面上吸附的高分子数、界面膜厚度、油水界面张力以及体系达到平衡所需要的时间等。研究表明:星形高分子在界面上吸附的数目由其结构和在系统中的浓度决定;星形高分子形成的界面膜是不对称的,其厚度由分子结构和浓度共同决定;系统达到平衡所需要的时间不仅与分子的浓度有关,还与其结构有关;星形高分子的支链长度越长,表面活性越大;臂数越多,表面活性越小。

Dynamic Lattice Monte Carlo Simulation of the Adsorption of Star-Polymer at Oil-Water Interface

The adsorption process of star-polymer at oil-water interface was studied by dynamic Monte Carlo simulation.Research findings show some static and dynamic nature of the adsorption process,including the number of chains at oil-water interface,thickness of the interfacial member,interfacial tension of oil-water interface and time needed for the system to reach its final equilibrium.The research demonstrates that the number of star-polymer adsorbed at oil-water interface is determined by the structure and number of star-polymer in the system.The interfacial member formed by star-polymer is unsymmetrical and its thickness is determined by the structure and number of the star-polymer in the system together.Time needed for the system to get its final equilibrium is related to the number of star-polymer in the system and its structure.Star-polymer has higher interfacial activity when the length of its branch is longer and when it has more branches.