Diffusion of Nanoparticles in Semidilute Polymer Solutions： A Multiparticle Collision Dynamics Study  

纳米粒子在亚浓高分子溶液中的扩散： 多粒子碰撞动力学

作　　者：李树贤[1,2] 江慧军[1,2] 侯中怀[1,2] 

机构地区：[1]中国科学技术大学化学物理系,合肥230026 [2]中国科学技术大学合肥微尺度物质科学国家实验室(筹),合肥230026

出　　处：《Chinese Journal of Chemical Physics》2016年第5期549-556,I0001,共9页化学物理学报（英文）

摘　　要：The diffusion of nanoparticles immersed in semidilute polymer solutions is investigated by a hybrid mesoscopic multiparticle collision dynamics method. Effects of polymer concentration and hydrodynamic interactions among polymer monomers are focused. Extensive simulations show that the dependence of diffusion coefficient D on the polymer concentration c agrees with Phillies equation D-exp （-αc^δ） with a scaling exponent δ≈0.97 which coincides with the experimental one in literature. For increasing nanoparticle size, the scaling prefactor α increases monotonically while the scaling exponent always keeps fixed. Moreover, we also study the diffusion of nanoparticle without hydrodynamic interactions and find that mobility of the nanoparticle slows down, and the scaling exponent is obviously different from the one in experiments, implying that hydrodynamic interactions play a crucial role in the diffusion of a nanoparticle in semidilute polymer solutions.

关 键 词：NANOPARTICLE Polymer solution Multiparticle collision dynamics 

分 类 号：O[理学]