Effect of water on the breakdown and dielectric response of polypropylene/nano-aluminium nitride composites
Effect of water on the breakdown and dielectric response of polypropylene/nano-aluminium nitride composites
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DOI：
10.1007/s10853-020-04635-1
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发表时间：
2020-07-01
影响因子：
4.5
通讯作者：
Andritsch, Thomas
中科院分区：
文献类型：
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作者：
Wang, Xinyu;Qiang, Dayuan;Andritsch, Thomas
研究了水浸和硅烷处理对聚丙烯/纳米氮化铝（PP/nano-AlN）复合材料交流击穿和复介电响应的影响。经检查，收到的填料具有纳米级颗粒分布，具有六边形形状和轻微的水解。用辛基硅烷接枝氮化铝使在水浸期间填充有10重量%氮化铝的样品的重量增加减少了3，从0.29%到0.09%。结果表明，“湿”复合材料样品的交流击穿强度和复介电常数与纳米填料的硅烷处理有关。辛基硅烷处理过的样品在浸水9天后的AC击穿强度显示出与干燥样品相当的结果，而在未处理的样品上可以看到降低。虽然硅烷处理的样品仍然表现出增加的介电损耗在低频水浸后，一个显着的减少，在低频色散的真实的和虚介电常数可以看到相比，未处理的复合材料。这表明，通过适当的硅烷处理可以获得显着的增益PP/纳米AlN复合材料。
The influence of water immersion and silane treatment on the AC breakdown and the complex dielectric response of polypropylene/nano-aluminium nitride (PP/nano-AlN) composites has been investigated. The as-received filler was examined to have a nanoscale particle distribution with a hexagonal shape and slight hydrolysation. Grafting the aluminium nitride with an octyl silane reduces the weight increase in samples filled with 10 wt% of aluminium nitride during water immersion by 3, from 0.29 to 0.09%. The results suggest that the AC breakdown strength and complex permittivity of "wet" composite samples are related to the silane treatment of the nanofiller. The AC breakdown strength of octyl silane-treated samples after 9 days of water immersion shows comparable results to the dry samples, while a reduction can be seen on non-treated samples. Although silane-treated samples still show an increased dielectric loss at low frequency after water immersion, a significant reduction in low-frequency dispersion of real and imaginary permittivity can be seen when compared to the non-treated composites. This indicates that significant gains can be obtained for PP/nano-AlN composites by suitable silane treatments.