In this work, XLPE/MWCNT and XLPE/CB nanocomposites have been prepared in order to investigate AC electric field and water effects on electrical aging of XLPE. The mechanical, AC breakdown strength and AC conductivity were tested and the morphologies after 30 days electrical aging were observed using an optical microscope. The results showed that all samples exhibit excellent insulation properties and mechanical properties. Compared with CB addition, the MWCNT composites exhibit better resistance to electrical aging, with the length of electrical aging-induced microcracks in the MWCNT blends decreasing from 104 to 22 µm, and the width decreasing from 87 to 17 µm, which means a reduction of ∼80% compared of values for neat XLPE in both length and width. However, the XLPE/CB composites have a tendency to promote electrical aging. The mechanism is revealed by comparing the results of the fibrous MWCNTs with the spherical CBs.

在这项工作中，已经制备了XLPE / MWCNT和XLPE / CB纳米复合材料，以研究交流电场和水对XLPE电老化的影响。测试了机械，交流击穿强度和交流电导率，并使用光学显微镜观察了30天电老化后的形貌。结果表明，所有样品均表现出优异的绝缘性能和机械性能。与添加CB相比，MWCNT复合材料具有更好的抗电老化性能，MWCNT共混物中由电老化引起的微裂纹的长度从104降低至22 µm，宽度从87降低至17 µm，这意味着净长交联聚乙烯的长度和宽度值的〜80％进行了比较。但是，XLPE / CB复合材料具有促进电老化的趋势。