Effects of Surface Nitrification on Thermal Conductivity of Modified Aluminum Oxide Nanofibers-Reinforced Epoxy Matrix Nanocomposites

Bulletin of the Korean chemical society

Byung-Joo Kim¹  Soo-Jin Park¹  Kay-Hyeok An¹  Kyong-Min Bae¹ 

关键词: Aluminium oxide;    Aluminum nitride;    Thermal nitrification;    Thermal conductivity;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Aluminum oxide (Al2O3) nanofibers were treated thermally under an ammonia (NH3) gas stream balanced by nitrogen to form a thin aluminum nitride (AlN) layer on the nanofibers, resulting in the enhancement of thermal conductivity of Al2O3/epoxy nanocomposites. The micro-structural and morphological properties of the NH3- assisted thermally-treated Al2O3 nanofibers were characterized by X-ray diffraction (XRD) and atomic force microscopy (AEM), respectively. The surface characteristics and pore structures were observed by X-ray photoelectron spectroscopy (XPS), Zeta-potential and N2/77 K isothermal adsorptions. From the results, the formation of AlN on Al2O3 nanofibers was confirmed by XRD and XPS. The thermal conductivity (TC) of the modified Al2O3 nanofibers/epoxy composites increased with increasing treated temperatures. On the other hand, the severely treated Al2O3/epoxy composites showed a decrease in TC, resulting from a decrease in the probability of heat-transfer networks between the filler and matrix in this system due to the aggregation of nanofiber fillers.

【 授权许可】

Unknown