### 具有多体效应的胶体聚团的特征

• 收稿日期:1996-05-31 修回日期:1996-07-10 发布日期:1997-01-15
• 通讯作者: 李敬生

### Characteristics of Colloidal Aggregates with Many-body Effect

Li Jing-Sheng,P.Mark Rodger

1. Department of Metallurgy,Xi'an University of Architecture and Technology|Dept.of Chem,Univ,of Reading,U.K
• Received:1996-05-31 Revised:1996-07-10 Published:1997-01-15
• Contact: Li Jing-Sheng

Abstract:

Effects of many-body (by Sutton-Chen potential, SC) on colloidal aggregates have been examined and compared with that ot two-body (by Lennard-Jones potential, LJ)Some characteristics were similar in both SC and LJ systems such as potential energy increased, and the number of particles in a cluster decreased with increasing shear rates; clusters were stretched remarkably in shear (X axis) direction and the longest axis of clusters deviated from X axis under stronger shear held; etc. Their differences were also obvious : arrangement of particles in SC system was more reasonable than in LJ system so that the potential energy in SC system was lower 1-3 dimensionless energy units, thereby clusters in SC system were closer and their fractal dimension higher; dependent of petential energy for particles, average cluster size and fractal dimension on shear rates was weaker in SC than in LJ systems; morphologies of clusters were occasionally changed to some extent.