电力外绝缘用硅橡胶清洗修复剂制备及性能研究

The preparation and performance of silicone rubber clean-repairing agent for power external insulation

硅橡胶广泛应用于电力行业的复合绝缘子和防污闪涂料,然而长时间工况运行后,容易发生老化粉化、污秽沉积,降低表面憎水性。目前电网中有上亿支硅橡胶绝缘子服役多年,研究能够清除表面污秽,修复硅橡胶老化层的新型清洗剂迫在眉睫。文中探究不同非离子表面活性剂含量和修复剂含量对清洗效率和憎水性的影响。实验表明非离子表面活性剂含量在3%时,洗净率最高达到95%。而修复剂含量为11%时,憎水性最好,其憎水迁移性最佳可以达到HC1级。通过扫描电镜分析,发现清洗后硅橡胶表面微孔和裂缝消失,表面平整,表明该清洗剂具有去除粉化层和污秽,修复老化绝缘子的效果。这为继续研发硅橡胶清洗修复剂,延长绝缘子服役期限提供一定的理论和实践基础。

Silicone rubber is widely used in composite insulators and anti-pollution flashover coatings in the power industry.However,after long-term operation,it is prone to aging chalking and dirt deposition,which reduces the surface hydrophobicity.Hundreds of millions of silicone rubber insulators are in service for many years in the power grid,and it is urgent to study a new type of cleaning agent that can remove surface contamination and repair the aging layer of silicone rubber.The effects of different non-ionic surfactant content and repair agent content on cleaning efficiency and hydrophobicity were investigated.Experiments show that when the content of non-ionic surfactant is 3%,the cleaning efficiency is up to 95%.When the content of the repairing agent is 11%,the hydrophobicity is the best,and its hydrophobic migration can reach the HC1 level.Through scanning electron microscopy analysis,it is found that the micropores and cracks on the surface of the silicone rubber disappear after cleaning,and the surface is smooth,indicating that the cleaning agent has the ability of removing the aging layer and contamination,and repairing the aging insulators.This provides a theoretical and practical basis for continuing to develop silicone rubber clean-repairing agents and extending the service life of insulators.