This paper investigates partial discharge (PD) characteristics of crosslinked polyethylene (XLPE) nanocomposites for unmodified, agglomerated, and Octylsilane-modified silica nanofillers (nano 1, 2, 3, 4, 5, 10 wt %) case. The surface modification of nanofiller helps to reduce the PD formation marginally. Octylsilane surface-modified XLPE/silica nano 3 wt % exhibits the lowest PD activity with highest discharge inception voltage and breakdown voltage. Also, the issue of change in the polymer structure due to the addition of nanofillers is reported here. The differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA), fourier transform infrared (FTIR), and contact angle measurement study conducted suggests that the addition of nanosilica leads to the change in the melting point, thermal degradation temperature, heat of fusion, bonding structure and the contact angle of the polymer, respectively. These structural changes are explained with the supporting theory.

本文研究了交联聚乙烯（XLPE）纳米复合材料在未改性，团聚和辛基硅烷改性的二氧化硅纳米填料（纳米1、2、3、4、5、10 wt％）情况下的局部放电（PD）特性。纳米填料的表面改性有助于略微减少PD的形成。辛基硅烷表面改性的XLPE /二氧化硅纳米粉3 wt％具有最低的PD活性和最高的放电起始电压和击穿电压。另外，这里报道了由于添加纳米填料而引起的聚合物结构变化的问题。进行的差示扫描量热法（DSC），热重分析（TGA），傅立叶变换红外（FTIR）和接触角测量研究表明，添加纳米二氧化硅会导致熔点，热降解温度，熔融热的变化。 ，聚合物的键合结构和接触角。这些结构性变化用支持理论进行了解释。