Nano and fine particles surface design for aggregation and dispersion behavior control in liquid to apply functional material

Speaker: Prof. Hidehiro Kamiya

　　Institute of Engineering, Tokyo University of Agriculture and Technology, Japan

　　时间：11月21日 （星期五）上午9:00

　　地点：四号楼14层第二会议室

　　联系人： 王士维 （52414320）

　　Abstract:

　　Nano and fine particles dispersion and aggregation behavior control is one of the most important fundamental processes for the application of nanoparticles to various functional devices, such as ceramics, polymer composite and electrode of Li battery. Surface modification and treatment by using various surfactants and coupling agents with different molecular structure on prepared particle surfaces in organic solvents were applied to control surface interaction between particles. After surface treatment on particles in suspension, if surface modified molecules were almost completely covered on the surface of nanoparticles, surface modified nanoparticles were able to be re-dispersed into various organic solvent. Uniform nanoparticles dispersed polymer composites were prepared from nanoparticles dispersed suspension without aggregation. Furthermore, molecular and nanometer scaled surface structure and interaction after modification was characterized by using a colloid probe atomic force microscope, AFM, method. Based on the measurement results, the action mechanism of surface modification was discussed. Finally, some examples of application of surface modified nanoparticles will be introduced.

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