Enhanced dielectric properties of epoxy resin with high content of nano-Al2O3 composites

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Xu, Dandan^1 ; Wang, Tingting^1 ; Han, Xinghao^1 ; Qiao, Ru^1

XiZang Agriculture and Animal Husbandry College, Tibet, China^1

关键词: Al2O3 particles;    Casting method;    Epoxy matrices;    Fourier transform infra red (FTIR) spectroscopy;    High frequency HF;    High-content;    Silicon coupling agent;    Well-dispersed;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022074/pdf
DOI  :  10.1088/1755-1315/108/2/022074

来源: IOP

【 摘 要 】

Epoxy resin was modified by adding different contents (30%, 60% wt.) of nano-Al2O3particles, which were modified by silicon coupling agent KH560 (γ-amino propyl triethoxy silane), in the form of nano-Al2O3particles/epoxy composites, via casting method to improve the dielectric properties. The chemical structures of modified and unmodified nano-Al2O3particles and the morphologies of composites fractures were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) respectively. And the thermal property and dielectric properties were also investigated. The results showed the modified nano-Al2O3particles well dispersed in the epoxy matrix and the thermal stability of composites was improved. And the dielectric constant of the composites was up to 14 when the content of nano-Al2O3was 60%, which was 2 times larger than that of pure epoxy. Moreover, the composites also exhibited good dielectric property under high frequencies ranged from 1x107 to 4x107 Hz.