土壤中无机纳米微粒的自组装行为研究

采用超声波分散和离心分离的方法分离出土壤无机纳米微粒.通过透射电镜观察发现土壤中无机纳米微粒的形态主要有圆球状、片状、柱状、锥状、核状,并且不同形态的纳米微粒由溶胶向非溶胶状态转化时呈线性凝聚.通过原子力显微镜观察发现,组装团聚是土壤团聚体形成的真正机制.土壤无机纳米微粒在矿物表面和气液界面能发生自组装作用,土壤无机纳米微粒在矿物表面的自组装行为与矿物表面的特性有关,在活化矿物表面容易发生自组装反应,而非活化矿物表面则不容易发生反应,活化矿物表面的自组装与气液界面的组装作用非常相似.

Study on self-assemble action of soil inorganic nanoparticles

The soil inorganic nanoparticles were extracted by ultrasonic TEM images of SINP show that the particle shape of SINP are mainly action and centrifuging methods. globular, lamellar, columnar, cone, nucleus, etc. The self- assembling actions of nanoparticles were researched. It was discovered that different nanoparticles interacted according to linear assembling from sol to non- sol situation. The conclusion was obtained that the linear assembling of soil nanoparticles is the reason of soil plasticity, which is a new interpret about soil plasticity. On the mineral surface and liquid -solid interface, SINP can assemble themselves to form films. This assemble action is relation to the character of mineral surface. On the active surface, SINP was liable to self - assemble reaction. But it was difficult to do that on inactive surface. The self - assembling action on active surface was similar to that on liquid- solid interface.