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首页> 外文期刊>Journal of Composite Materials >Effect of coupling agents on the dielectric properties of aluminum particles reinforced epoxy resin composites
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Effect of coupling agents on the dielectric properties of aluminum particles reinforced epoxy resin composites

机译：偶联剂对铝颗粒增强环氧树脂复合材料介电性能的影响

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摘要

In this study, four kinds of coupling agents (i.e., silane KH550, silane KH560, titanate NXT-102, titanate NXT-201), were used to modify the surfaces of aluminum (Al) particles. The effects of these coupling agents on the microstructures and dielectric properties of the Al/epoxy composites were investigated by the scanning electron microscope (SEM) and dielectric analyzer. The SEM observations reveal that the use of coupling agents improved the interfacial bond strength between Al particles and epoxy resin, and decreased the voids and defects at the phase interfaces. The dielectric analysis indicate that the surface modification of Al particles had an appreciable effect on the dielectric permittivity of the composites at high filler concentration, that is, at 70 wt% Al particles (treated with silane KH560) content, the dielectric permittivity of the composites reached 34.1, as compared to 19.6 for the untreated filler reinforced one; however, the dielectric loss factors of the composites slightly decreased, and they remained at a very low level under various applied sweep frequencies despite the filler content.
机译：在这项研究中，四种偶联剂（即硅烷KH550，硅烷KH560，钛酸酯NXT-102，钛酸酯NXT-201）用于修饰铝（Al）颗粒的表面。通过扫描电子显微镜（SEM）和介电分析仪研究了这些偶联剂对铝/环氧树脂复合材料的微观结构和介电性能的影响。 SEM观察表明，偶联剂的使用改善了Al颗粒与环氧树脂之间的界面结合强度，并减少了相界面处的空隙和缺陷。介电分析表明，在高填料浓度下，Al颗粒的表面改性对复合材料的介电常数有显着影响，即在70 wt％Al颗粒（用硅烷KH560处理）下，复合材料的介电常数达到34.1，而未处理的填料增强的为19.6;然而，复合材料的介电损耗因子略有下降，尽管填料含量不同，它们在各种施加的扫描频率下仍保持在非常低的水平。

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