作　　者： ; ; ; ;

机构地区： 重庆大学机械工程学院

出　　处： 《重庆大学学报（自然科学版）》 2004年第5期9-11,16,共4页

摘　　要： 纳米微粒粒径与胶体粒子粒径处于同一范围,纳米微粒在液相中的分散体系属于胶体范畴。计算常见几种纳米微粒在水中的沉降速度发现,纳米微粒在水中沉降十分缓慢,纳米微粒胶体在动力学上具有相当高的稳定性,实验研究结果验证了此结论。文章还介绍了电学性质及高分子添加剂对纳米胶体稳定性的影响。研究结果将有助于人们从定性及定量的层面上认识纳米胶体的稳定性。 The dimension of nano-particles is close to the dimension of colloid particles. The dispersion system of nano-particles is colloid. The sedimentation rate of nano-particles dispersed in water is calculated, and it is shown that the sedimentation rate is very slow and the nano colloids have high stability on dynamics. Those conclusions are approved by tests. The influence of electric characters of the colloid and macromolecule was introduced. The results of the study maybe out of the image of most people and are useful to change their attitude of the kinetics stability of real nano particles colloid.

关 键 词： 纳米材料 胶体 稳定性

领　　域： [理学] [理学]