【摘要】 采用超疏水涂层是提高输电线路绝缘子防冰能力的重要方法之一。为此,提出一种通过在低表面能疏水性材料表面化学沉积纳米粒子制备绝缘子超疏水涂层的方法。扫描电镜显示涂层表面有类荷叶的微纳二元复合粗糙结构,其水滴静态接触角达到(160±0.5)°。将分别涂敷有超疏水涂层、RTV涂层以及无涂层的玻璃板试品放入人工覆冰实验室进行覆冰试验,测试了3种覆冰试品的覆冰形貌、覆冰质量以及交流闪络电压。试验与分析结果表明,涂敷RTV涂层与无涂层的试品相比,超疏水涂层试品的试品覆冰形成显著较慢,覆冰质量较低,超疏水涂层防止了连续冰膜的形成,提高了试品的覆冰闪络电压。更多还原

【Abstract】 Application of super-hydrophobic coatings is an important approach to improve anti-icing ability of insulators.An approach to fabricate super-hydrophobic coatings on insulators was proposed and based on chemically depositing nano-particles on surfaces with low surface energy.A dual micro-and nano-roughness on the supper-hydrophobic coating was observed through field emission scanning electron microscope(FE-SEM).The water contact angle of the super-hydrophobic surface was(160±0.5)°.Glass specimens with the super-hydrophobic coating and the room temperature vulcanized(RTV) silicone rubber coating respectively and without coating,were installed in a climate chamber for ice accumulation experiments.Ice morphology,ice weight,and AC flashover voltage of the three types of iced specimens were measured during experiments.Experimental and analytical results show that the specimens with superhydrophobic coating had slower ice accumulation and smaller ice weight than the specimens with RTV silicon rubber coating and without coating.The super-hydrophobic coating prevents the formation of continues ice film on specimens and enhances the AC flashover voltages of iced specimens.更多还原