Anti-icing Performance of Complex Texture Silicone Rubber Surface Based on Laser Engraving

被引：2
|
作者：
Zhao Meiyun [1 ,2 ]
Yang Fan [1 ]
Zhang Xiaolong [1 ]
Yin Yunhui [2 ]
Zhao Yan [2 ]
Zhao Xinze [1 ]
机构：
[1] China Three Gorges Univ, Hubei Key Lab Hydroelect Machinery Design & Maint, Yichang 443002, Hubei, Peoples R China
[2] China Three Gorges Univ, Coll Mech & Power Engn, Yichang 443002, Hubei, Peoples R China
来源：
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG | 2022年 / 49卷 / 10期
关键词：
laser technique; surface processing; laser engraving; composite insulator; complex texture; superhydrophobic surface; anti-icing; ALUMINUM-ALLOY;
D O I：
10.3788/CJL202249.1002603
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Objective Silicon rubber composite insulators havebeenwidelyusedinhigh-voltagetransmission distributionlines andsomehigh-voltagetransmissionpartsmachineryduetotheirgoodelectricalinsulation excellentantipollutioncharacteristics andlowmaintenancecost Transmissionlinesoftenworkincoldandheavilypollutedconditions andtheanti-icingabilityofinsulatorsaffectsthesafetyoftransmissionlines Asanewanti-icingmethod thesuperhydrophobicsurfacehastheadvantagesoflowenergyconsumption lightweight andsimplestructure Italsoshowsagoodapplicationprospectinreducingice-coveredflashover foulingflashover andtowercollapseaccidentsofhigh-voltagetransmissionlines ManydomesticandforeignresearchersdeterminedthatthesuperhydrophobicsurfacehasagreatpositiveeffectinreducingtheadhesionstrengthoficeonthematerialsurfaceandhasacertaineffectofdelayingicingThemostwidelyusedmethodforpreparingsuperhydrophobicsiliconerubbersurfacesisthecoatingmethodduetothephysicalandchemicalpropertiesofsiliconerubber However thecoatinginharshenvironmentscaneasilyfailbecauseofthepoormechanicalstabilityandimpactresistanceofthecoatingInpreviousstudies superhydrophobicsurfaceswereobtainedusingchemicalreagentstoreducesurfaceenergyafterlaserprocessingofmicro-nanostructures Herein thesiliconerubbercompositeinsulatorsumbrellaskirtmaterialhasthecharacteristicsoflowsurfaceenergythus itrequiresnomodificationthroughchemicalreagents Thelaserengravingmachineisusedtoprocessmicron-scaletexturetoobtainasuperhydrophobicsurface whichhasahigherprocessingefficiencythanananoscalemachine Therefore usingalaserengravingmachinetoprepareasuperhydrophobicsurfacetoshortentheicingofthesiliconerubbercompositeinsulatorhasacertainapplicationprospect MethodsHerein theD80Mmultifunctionallaserengravingmachineisusedtoprocessdifferenttypesanddimensionalparametertexturesonthesurfaceofthecompositeinsulatorsiliconerubbersamples Thesurfacemorphologyofthespecimensisobservedbyathree-dimensionalmorphometerandscanningelectronmicroscope andthehydrophobicityprinciplesofthespecimensareanalyzed Thecontactangleofthesampleswithdifferentcomplextexturesurfacesistestedusingacontactanglemeasuringinstrument Consequentlytheoptimaltypeandsizeparametersofcomplextexturewiththebesthydrophobicityareobtained Thefreezingtimeofwaterdropletsonthespecimensurfaceisevaluatedusingahighandlowtemperature-humiditytestchambertotestthefreezingtimeofwaterdropletsondifferenttexturespecimensurfacesat-1 0 degrees C Theiceadhesionforceondifferenttexturesurfacesisalsoinvestigated Furthermore theanti-icingdurabilityofthespecimensisexaminedbytestingthechangecontactangleandfreezingtimeafterrepeatedicingandde-icingofthespecimens ResultsandDiscussionsThetexturedsurfaceofthespecimenspreparedbylaserprocessingwithoutanychemicalmodification hasgoodhydrophobicityandthecontactangleofthesquare+circulartextureSq+Cisurfacewiththesizeof350 mu mcanreach154 1 degrees torealizesuperhydrophobicityFig4Thestudyontheanti-icingpropertyshowsthatthefreezingtimeofthedropletondifferentcomplextexturesurfacesfirstincreasesandthendecreasesasthesizeincreases ThelongestfreezingtimeisreachedattheSq+Citexturesurfacewiththesizeof350 mu m whichis144sFig5Comparedtotheoriginalsurfacewithanicingadhesionforceof4 54Nandafreezingtimeof72s theadhesionforcesofthedropletonthethreetexturedsurfaceswiththeoptimalsizearebelow2Ninthesamelow-temperatureconditionFig7Whentheenvironmentaltemperaturechangefrom-4to-12 degrees C thefreezingtimeofthedropletontheSq+Citexturesurfacedecreasesfrom355to129sandbecomesshorterbyabouttwo-thirds demonstratingthattheanti-icingperformanceofthespecimensdecreasessharplyastheenvironmentaltemperaturedecreasesFig9Additionallyafter20timesoficingandde-icingthefreezingtimeofthedropletonthesamplesurfaceremainshigherthan133s indicatingthatthesurfaceofthesiliconerubber processedbylaserengravinghasgoodanti-icingdurabilityFig10ConclusionsInthisstudythehydrophobicityofsiliconerubbercanbesignificantlyimprovedbyconstructingroughcomplexmicrotexturesonthesurfacevialaserengravingThehydrophobicityofthethreedifferentcomplextexturesfirstincreasesandthendecreasesasthesizeincreases andtheSq+Citexturewiththesizeof350 mu mhasthebesthydrophobicityandiceresistance Thereisalinearrelationshipbetweenhydrophobicityandanti-icingperformanceofdifferenttextures Thebetterthehydrophobicityofthetexturedsurface thelongerthefreezingtimeandbettericingresistanceduetotheslowerheatexchange Thesurfacewearresistanceofthetexturedsampleisgood Aftericingandde-icingtheiceresistancedoesnotdecreasetoomuch andthesurfaceicingcanstillbedelayedtoagreatextent Afterthelaserengravingthetexturedsurfacewearresistanceofthesiliconerubbercompositeinsulatorisgood whichcanbeseenfromthechangeinthecontactangleandfreezingtimeaftermultipleicingandde-icingThetexturedsurfacecanstilldelaythesurfaceicingtoalargeextent Thisstudyhasacertainreferencevalueforthedesignofimprovingtheanti-icingabilityofequipmentsurfacesand provides new ideas for high-efficiency laser processing
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