Abstract Designing an outdoor insulation-appropriate material architecture with superior surface weatherability, hydrophobicity transfer, and electrical and mechanical properties would play an essential role in enhancing the security operations of power systems. In this work, a cycloaliphatic epoxy resin (CEP) was modified with organofluorine and organosilicon to introduce functional groups to improve its surface properties. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectral analysis showed that these functional groups were successfully introduced into the modified CEP. The characteristics of the modified CEP were assessed in terms of weather resistance, mechanical properties and hydrophobicity. The results show that the modified CEP composite surface integrates the complementary characteristics of multiple components, thereby greatly improving the surface impact toughness, hydrophobicity and weatherability. The hydrophobicity migration of the new composite was tested. The results show that a large number of hydrophobic groups (Si−CH3) migrate to the sample surface, causing self-healing of hydrophobicity, which helps prevent pollution flashover. In addition, electric insulation tests were conducted on modified CEPs with different contents of micro-nanometre fillers without affecting the mechanical properties of the composite system. The test results revealed the best combination of inorganic fillers to improve the insulation performance. The micromorphology and mechanism of interaction between the CEP-based composite and nanoparticles were analysed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermally stimulated depolarization current (TSDC) and broadband dielectric spectroscopy. This work provides an invaluable guideline for the design of outdoor insulation composite materials.

中文翻译：

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通过反应诱导的有机官能团高效增强环脂族环氧基杂化纳米复合材料的表面耐候性和电气和机械性能

摘要 设计一种具有优异表面耐候性、疏水性转移以及电气和机械性能的户外绝缘材料结构将在增强电力系统的安全运行方面发挥重要作用。在这项工作中，脂环族环氧树脂 (CEP) 用有机氟和有机硅改性以引入官能团以改善其表面性能。X 射线光电子能谱 (XPS) 和傅里叶变换红外 (FT-IR) 光谱分析表明，这些官能团已成功引入改性 CEP。从耐候性、机械性能和疏水性方面评估了改性 CEP 的特性。结果表明，改性CEP复合材料表面融合了多种组分的互补特性，从而大大提高了表面冲击韧性、疏水性和耐候性。测试了新复合材料的疏水性迁移。结果表明，大量疏水基团（Si-CH3）迁移到样品表面，引起疏水性自愈，有助于防止污闪。此外，在不影响复合系统力学性能的情况下，对具有不同微纳米填料含量的改性 CEP 进行了电绝缘测试。测试结果揭示了无机填料的最佳组合，以提高绝缘性能。通过扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、X 射线衍射 (XRD)、热激去极化电流 (TSDC) 和宽带介电光谱分析了 CEP 基复合材料与纳米粒子之间的微观形貌和相互作用机制。 . 这项工作为室外保温复合材料的设计提供了宝贵的指导。