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时间:2020-06-03
《臭氧浓度对HTV硅橡胶材料的老化作用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2013年1月电工技术学报VO1.28No.1第28卷第1期TRANSACTIONSOFCHINAELECTROTECHNICALSOCIETYJan.2013臭氧浓度对HTV硅橡胶材料的老化作用屠幼萍,2王倩,2李敏1,2丁立健,2(1.华北电力大学高电压与电磁兼容北京市重点实验室北京1022062.华北电力大学新能源电力系统国家重点实验室北京102206)摘要为了研究电晕放电过程中所产生的臭氧对高温硫化(HTV)硅橡胶老化作用的影响,利用研制的臭氧老化试验装置,考虑臭氧浓度及作用时间等因素,对HTV硅橡胶复合绝缘子试样进行了系统的臭氧老化试验,并且对老化后的试样进行了扫描电镜(SEM)
2、、傅里叶红外光谱(FTIR)分析、憎水性和热刺激电流(TSC)测试。试验结果表明,臭氧能够导致硅橡胶材料表面缺陷增多,憎水性丧失,而且浓度越高,老化会越严重。进一步分析得出,硅橡胶材料在臭氧环境作用下,材料表面平滑、致密的物理结构被破坏,产生了孔洞等缺陷,并且当臭氧环境作用强度达到一定程度后,材料的物理结构的破坏将更为严重;同时,化学基团含量发生变化,试样中Si—O—Si结构减少,羟基和Si.O键增多,试样主链和侧链断裂。关键词:HTV硅橡胶臭氧浓度老化憎水性热刺激电流(TSC)微观分析中图分类号:TM852InfluenceofOzoneC0ncentratiOnonDeteriOrat
3、i0nOfHTVSiliconRubberTuYouping’WangQian,LiMin'DingLo'ian·(1.BeringKeyLaboratoryofHighVoltage&EMCNorthChinaElectricPowerUniversitvBeOing102206China2.StateKeyLaboratoryofAlternateElectricalPowerSystemwithRenewableEnergySourcesNorthChinaElectricPowerUniversityBeijing102206China)AbstractInordertostudy
4、theinfluenceofozonecreatedduringcoronadischargeonHTVsiliconerubberaging,thispaperusesdevelopedozonegenerationsystemcontainertosystematicallytesttheozoneagingcharacteristicofHTVsiliconerubbercompositeinsulators,consideringtheinfluencesofozonedensityandagingtimeetc.Scanningelectronmicroscopy(SEManal
5、ysis,Fouriertransforminfraredspectral(FTIR)analysis,hydrophobicityanalysisandthermallystimulatedcurrent(TSC)testareappliedontheagingsamples.Thetestresultsshowthat,ozonecanresultinmoredefectsonsiliconerubbersurfaceandlossofhydrophobicity,andtheagingbecomesmoresevereunderahigherozonedensity.Furthera
6、nalysisrevealsthatthesurfacesmoothnessanddensephysicalstructureofsiliconerubberaredestroyedintheozoneenvironmentandthusdefectssuchasholesappear.Andthedestructionofphysicalstructurebecomesmoreseriouswhentheintensityofozonereachescertainadegree.Meanwhilethechemicalgroupcontentofthesamplewillchange:S
7、i.O.Sibonddecreases.hydroxylandSi—Obondincrease,andthemainchainandsidechainofsiliconerubberrupture.Keywords:HTVsiliconerubber,ozoneconcentration,aging,hydrophobicity,thermallystimulatedcurrent(TSC),microanalysis国
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