The moisture generated by the ageing of the oil-paper insulating system can easily lead to the deterioration of the performance of the insulating paper. In order to alleviate the impact of moisture on the performance of the insulating paper, we developed a kind of lipophilic hydrophobic self-repairing cellulose insulating paper (new insulating paper) based on the ternary system of polytetrafluoroethylene, fluorocarbon surfactant and fluorinated alkyl silane, and accelerated thermal ageing test for 45 days at 130°C was carried out. The experimental results show that the new insulating paper with excellent lipophilic property can realise hydrophobic self-repairing through heat treatment after physical damage. The tensile strength and elongation at break of the new insulating paper increased by 5%–8% and 6.25%–27% respectively compared with the original cellulose insulating paper. At the end of ageing, the relative dielectric constant and dielectric loss factor of new insulating paper are 10.4% and 9.9% lower than that of the original cellulose insulating paper, while the breakdown voltage is 6.8% higher. The acid and moisture content produced during the ageing process of the insulating oil impregnated with new insulating paper are also less, indicating that the coating can delay the ageing of the insulating paper.

中文翻译：

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以ST-110/FAS/PTFE三元体系为涂层基材开发的新型亲油疏水自修复纤维素绝缘纸

油纸绝缘系统老化产生的水分很容易导致绝缘纸性能的恶化。为了减轻水分对绝缘纸性能的影响，我们开发了一种基于聚四氟乙烯、氟碳表面活性剂和氟化烷基硅烷三元体系的亲油疏水自修复纤维素绝缘纸（新型绝缘纸），在130℃下进行45天的加速热老化试验。实验结果表明，具有优异亲油性能的新型绝缘纸在物理损伤后可以通过热处理实现疏水性自修复。新型绝缘纸的拉伸强度和断裂伸长率比原纤维素绝缘纸分别提高了5%~8%和6.25%~27%。老化结束时，新型绝缘纸的相对介电常数和介电损耗因数比原纤维素绝缘纸降低10.4%和9.9%，而击穿电压则提高6.8%。新绝缘纸浸渍的绝缘油在老化过程中产生的酸和水分含量也较少，说明涂料可以延缓绝缘纸的老化。