当前位置: X-MOL 学术Chinese. J. Polym. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Thermally Conductive and Insulating Epoxy Composites by Synchronously Incorporating Si-sol Functionalized Glass Fibers and Boron Nitride Fillers
Chinese Journal of Polymer Science ( IF 4.3 ) Pub Date : 2020-03-17 , DOI: 10.1007/s10118-020-2391-0
Rui-Han Zhang , Xue-Tao Shi , Lin Tang , Zheng Liu , Jun-Liang Zhang , Yong-Qiang Guo , Jun-Wei Gu

Glass fibers (GFs)/epoxy laminated composites always present weak interlaminar shear strength (ILSS) and low cross-plane thermal conductivity coefficient (λ). In this work, silica-sol, synthesized from tetraethyl orthosilicate (TEOS) and KH-560 via sol-gel method, was employed to functionalize the surface of GFs (Si-GFs). Together with a spherical boron nitride (BNN-30), the thermally conductive BNN-30/Si-GFs/epoxy laminated composites were then fabricated. Results demonstrate that Si-sol is beneficial to the improvement of mechanical properties for epoxy laminated composites (especially for ILSS). The BNN-30/Si-GFs/epoxy laminated composites with 15 wt% BNN-30 fillers display the optimal comprehensive properties. In-plane λ(λ//) and λ reach the maximum of 2.37 and 1.07 W·m−1·K−1, 146.9% and 132.6% higher than those of Si-GFs/epoxy laminated composites (λ// = 0.96 W·m−1·K−1 and λ = 0.46 W·m−1·K−1), respectively, and also about 10.8 and 4.9 times those of pure epoxy resin (λ// = λ 0.22 W·m−1·K−1). And the heat-resistance index (THRI), dielectric constant (ε), dielectric loss (tanδ), breakdown strength (E0), surface resistivity (ρs) as well as volume resistivity (ρv) are 197.3 °C, 4.95, 0.0046, 22.3 kV·mm−1, 1.8 × 1014Ω, and 2.1 × 1014Ω·cm, respectively.



中文翻译:

同步掺入硅溶胶功能化玻璃纤维和氮化硼填料的导热绝缘环氧树脂复合材料

玻璃纤维(GFS)/环氧树脂层压复合材料总是存在弱的层间剪切强度(ILSS)和低横切面导热系数(λ )。在这项工作中,二氧化硅基溶胶,从原硅酸四乙酯(TEOS)和KH-560合成通过溶胶-凝胶法中,采用官能化飞行服务队(SI-GFS)的表面上。然后与球形氮化硼(BNN-30)一起制造了导热BNN-30 / Si-GFs /环氧层压复合材料。结果表明,硅溶胶有利于改善环氧层压复合材料的机械性能(特别是对于ILSS)。具有15 wt%BNN-30填料的BNN-30 / Si-GFs /环氧层压复合材料表现出最佳的综合性能。面内λλ //)和λ 达到最大的2.37和1.07·W·米-1 ·K -1,146.9%和132.6%,比那些的Si-飞行服务队/环氧树脂层压复合材料(高λ // = 0.96·W·米-1 ·K -1λ = 0.46·W·米-1 ·K -1),分别与也约10.8和4.9倍的那些纯环氧树脂(λ // = λ 0.22·W·米-1 ·K -1) 。和耐热性指数(Ť HRI),介电常数(ε),介电损耗(tanδ δ),击穿强度(ë 0),表面电阻率(ρ小号)以及体积电阻率(ρ v)是197.3°C,4.95,0.0046,22.3千伏·毫米-1,1.8×10 14 Ω,及2.1×10 14 Ω·cm时,分别。

更新日期:2020-03-17
down
wechat
bug