绝缘材料2023,56(7)王胜辉等：环氧树脂与聚四氟乙烯表面性能的研究环氧树脂与聚四氟乙烯表面性能的研究王胜辉，刘华琦，耿辉，马康，孙凯旋，律方成（华北电力大学新能源电力系统国家重点实验室，北京102206）摘要：为了研究不同材料绝缘子的表面性能，以环氧树脂和聚四氟乙烯（PTFE）为研究对象，首先通过表面能测试，获得不同材料绝缘子的粘附特性，然后通过试验研究不同粒径金属微粒在自然粘附状态下对绝缘子沿面闪络特性的影响。结果表明：PTFE绝缘子的表面能为30.44mJ/m2，低于环氧树脂绝缘子的表面能，PTFE的黏度更小；随着附着在绝缘子表面的金属微粒粒径的减小，环氧树脂和PTFE绝缘子的沿面闪络电压逐渐增大，且两种材料的绝缘子沿面闪络性能相近；采用PTFE界面取代原有的环氧树脂界面，可以减少由金属微粒引起的绝缘故障。关键词：气体绝缘金属封闭输电线路；聚四氟乙烯；环氧树脂；表面性能中图分类号：TM214DOI:10.16790/j.cnki.1009-9239.im.2023.07.003StudyonsurfacepropertiesofepoxyresinandPTFEWANGShenghui,LIUHuaqi,GENGHui,MAKang,SUNKaixuan,LÜFangcheng(StateKeyLaboratoryofAlternateElectricalPowerSystemwithRenewableEnergySources,NorthChinaElectricPowerUniversity,Beijing102206,China)Abstract:Inordertostudythesurfacepropertiesofdifferentmaterialsofinsulators,epoxyresinandpolytetrafluoroethylene(PTFE)wereusedasresearchobjects.Firstly,theadhesioncharacteristicsofinsulatorsmadeofdifferentmaterialswereobtainedthroughsurfaceenergytest.Then,theinfluenceofdifferentparticlesizesofmetalpatticlesonthesurfaceflashovercharacteristicsofinsulatorsundernaturaladhesionconditionswasstudiedthroughtest.TheresultsshowthatthesurfaceenergyofPTFEinsulatorsis30.44mJ/m2,whichislowerthanthatofepoxyresininsulators,andtheviscosityofPTFEissmaller.Astheparticlesizeofmetalparticlesattachedontheinsulatorsurfacedecreases,thesurfaceflashovervoltageofepoxyresinandPTFEinsulatorsincreasesgradually,andthesurfaceflashoverperformanceofthetwomaterialsofinsulatorsissimilar.TheinsulationfailurescausedbymetalparticlescanbereducedbyreplacingtheoriginalepoxyresininterfacewithPTFE.Keywords:GIL;PTFE;epoxyresin;surfaceproperties0引言气体绝缘金属封闭输电线路（gas-insulate...
