The influence of moisture on the electrical performance of XLPE/silica nanocomposites
The influence of moisture on the electrical performance of XLPE/silica nanocomposites
复制标题
水分对XLPE/二氧化硅纳米复合材料电性能的影响
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
L. Schadler
中科院分区：
文献类型：
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作者：
L. Hui;J. K. Nelson;L. Schadler
众所周知，水分会影响聚合物的电性能。纳米颗粒的引入创造了许多额外的途径，从根本上影响纳米复合材料中水分的迁移。在本文中，交联聚乙烯/二氧化硅纳米复合材料在负载5 wt%和12.5 wt%的非功能化和乙烯硅烷功能化纳米二氧化硅暴露在潮湿的高温环境中。与交联聚乙烯基树脂相比，纳米复合材料具有更高的吸湿性。通过击穿强度测量、脉冲电声分析和介电光谱对这些热液条件下样品的介电性能进行了表征。颗粒负载、吸湿率和介电性能之间存在密切关系，这为确定纳米介电材料的最佳颗粒负载应考虑水分影响提供了重要证据。
Moisture is known to influence the electrical performance of polymers. The introduction of nano particulates creates numerous additional pathways which radically affect the migration of moisture in nanocomposite materials. In this paper, cross-linked polyethylene/silica nanocomposites at loadings of 5 wt% and 12.5 wt% of both unfunctionalized and vinylsilane-functionalized nano silica were exposed to humid environments at elevated temperature. Nanocomposites were found to have a much higher moisture uptake compared to cross-linked polyethylene base resin. The dielectric properties of these hydrothermal conditioned samples were characterized by breakdown strength measurements, pulsed electro-acoustic analysis, and dielectric spectroscopy. A close relationship between particle loading, moisture uptake and dielectric properties was found, which provides important evidence that determining the optimal particle loading of nanodielectrics should take moisture influence into account.