| 复合绝缘子用硅橡胶材料的湿-热-紫外线多因素老化过程研究 |
| Study on Humid-Heat-Ultraviolet Multi-Factor Aging Process of Silicone Rubber Material for Composite Insulator |
| 投稿时间：2024-06-21 修订日期：2024-06-21 |
| DOI：10.12136/j.issn.1000-890X.2026.04.0243 |
| 中文关键词: 复合绝缘子 硅橡胶 多因素老化 |
| 英文关键词: composite insulator silicone rubber multi-factor aging |
| 基金项目:国家自然科学基金资助项目（52173208）；江苏省产学研合作项目（BY20221404） |
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| 中文摘要: |
| 为满足硅橡胶复合绝缘子耐老化性能不断提升的需要，搭建适用于复合绝缘子用硅橡胶材料加速老化的多因素老化装置，其可同时实现高温、高湿、紫外线辐照加速老化。在老化温度为120 ℃、相对湿度为100%以及紫外辐射照度为1 W·m-2条件下老化720 h，硅橡胶材料出现明显的粉化现象；在高温、高湿和紫外线辐照的共同作用下，硅橡胶分子主链和侧基持续降解或氧化，硅橡胶的交联网络结构动态变化，白炭黑和氢氧化铝等填料从硅橡胶基体中脱附出来，在硅橡胶材料表面形成粉化层；硅橡胶基体的结构破坏以及水汽从老化所形成的孔道中侵入硅橡胶基体，导致硅橡胶材料的力学性能持续下降。 |
| 英文摘要: |
| To meet the continuous improvement of the aging resistance of silicone rubber material for composite insulator，a multi-factor aging test device suitable for the accelerating aging of silicone rubber material for composite insulator was built，which could simultaneously realize high temperature，high humidity and ultraviolet irradiation accelerated aging.Under the conditions of aging temperature of 120 ℃，the relative humidity of 100% and the ultraviolet radiation intensity of 1 W·m-2 for 720 h，silicone rubber material showed obvious pulverization phenomenon.Under the combined action of high temperature，high humidity and ultraviolet irradiation，the main chains and side groups of silicone rubber molecules continue to degrade or oxidize，crosslinking network structure of silicone rubber dynamically changed，the fillers such as silica and aluminum hydroxide desorbed from silicone rubber matrex，forming a powdery layer on the surface of silicone rubber material.The mechanical properties of silicone rubber material deteriorated with the structural damage of silicone rubber matrix and the intrusion of water vapor through the pore formed by aging into silicone rubber matrix. |
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