Silicone rubber nanocomposites were prepared using 1, 3, 5, and 10 wt% of alumina nanofiller. Corona inception voltage (CIV) due to water droplets was measured using fluorescence technique, and it has decreased for alumina-added silicone rubber nanocomposites and with corona-aged samples. The effect of the corona discharges on the surface morphology characteristics of the nanocomposites was analyzed by measuring contact angle, surface profile measurement using atomic force microscopy (AFM), and characterized by adopting multiresolution signal decomposition (MRSD) technique. The addition of the alumina nanofiller suppressed the surface roughness for the corona-aged nanocomposites and 5-wt% sample observed to have the lowest surface roughness values. Recovery of the surface roughness caused by corona discharges was analyzed at different time intervals, and it was observed that alumina nanoparticle-added silicone rubber showed an incremental reduction in the roughness recovery rate. The laser-induced breakdown spectroscopy (LIBS) technique was adopted to analyze the nanocomposites after the corona aging, and further plasma temperature was evaluated at different recovery times. The addition of an alumina nanofiller increased the plasma temperature, and 5-wt% samples have the lowest plasma temperature recovery rate after corona aging. The analysis of the study indicates that the corona-aged silicone rubber specimen surface properties recover in 8 h of resting time period.

中文翻译：

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小波和LIBS技术电晕老化硅橡胶纳米复合材料表面状态研究

使用 1、3、5 和 10 wt% 的氧化铝纳米填料制备硅橡胶纳米复合材料。使用荧光技术测量由水滴引起的电晕起始电压 (CIV)，对于添加氧化铝的硅橡胶纳米复合材料和电晕老化样品，该电压降低。电晕放电对纳米复合材料表面形貌特征的影响通过接触角测量、原子力显微镜(AFM)表面轮廓测量、多分辨率信号分解(MRSD)技术表征。氧化铝纳米填料的添加抑制了电晕老化纳米复合材料的表面粗糙度，并且观察到 5-wt% 的样品具有最低的表面粗糙度值。在不同的时间间隔分析由电晕放电引起的表面粗糙度的恢复，观察到添加氧化铝纳米颗粒的硅橡胶显示粗糙度恢复率逐渐降低。采用激光诱导击穿光谱（LIBS）技术对电晕老化后的纳米复合材料进行分析，并进一步评估不同恢复时间下的等离子体温度。添加氧化铝纳米填料提高了等离子体温度，5wt% 的样品在电晕老化后具有最低的等离子体温度恢复率。研究分析表明，经过电晕老化的硅橡胶试样表面性能在 8 小时的静止时间内恢复。并且观察到添加了氧化铝纳米颗粒的硅橡胶显示粗糙度恢复率逐渐降低。采用激光诱导击穿光谱（LIBS）技术对电晕老化后的纳米复合材料进行分析，并进一步评估不同恢复时间下的等离子体温度。添加氧化铝纳米填料提高了等离子体温度，5wt% 的样品在电晕老化后具有最低的等离子体温度恢复率。研究分析表明，经过电晕老化的硅橡胶试样表面性能在 8 小时的静止时间内恢复。并且观察到添加了氧化铝纳米颗粒的硅橡胶显示粗糙度恢复率逐渐降低。采用激光诱导击穿光谱（LIBS）技术对电晕老化后的纳米复合材料进行分析，并进一步评估不同恢复时间下的等离子体温度。添加氧化铝纳米填料提高了等离子体温度，5wt% 的样品在电晕老化后具有最低的等离子体温度恢复率。研究分析表明，经过电晕老化的硅橡胶试样表面性能在 8 小时的静止时间内恢复。添加氧化铝纳米填料提高了等离子体温度，5wt% 的样品在电晕老化后具有最低的等离子体温度恢复率。研究分析表明，经过电晕老化的硅橡胶试样表面性能在 8 小时的静止时间内恢复。添加氧化铝纳米填料提高了等离子体温度，5wt% 的样品在电晕老化后具有最低的等离子体温度恢复率。研究分析表明，经过电晕老化的硅橡胶试样表面性能在 8 小时的静止时间内恢复。