Greenapproachtofabricationofasuperhydrophobicfilmoncopperandtheconsequentcorrosionresisitance——主講人：xxxTheauthoroftheliteraturePengWanga,DunZhanga,RiQiua,b,YiWana,JiajiaWua,bKeyLaboratoryofMarineEnvironmentalCorrosionandBio-fouling,InstituteofOceanology,ChineseAcademyofSciences,7NaihaiRoad,Qingdao266071,ChinaaGraduateSchooloftheChineseAcademyofSciense,19(jia)YuquanRoad,Beijing100039,ChinabFabricationofsuperhydrophobicfilmCufoilwithanareaof1cm2wasabradedwithemerypaperupto400grade,degreasedwithethanol,andthenblowdried.Super-hydrophobic?lmwasgrowninatwo-electrodecell,withCuasanodeandaplatinumwireascathode.A0.02MHMMTE/ethanolsolutionwasusedaselectrolyte.Filmwasgrownbyapplyingacellvoltageof5-30Vbetweenanodeandcathodefrom30minto2hatroomtemperature.TheconstantvoltagewassuppliedbyanuninterruptedDCpowersystempurchasedfromShenzhenParwaTechnologyCo.,Ltd.Afterelectrolysis,Cufoilwasbroughtout,washedwithethanol,andthendriedinnitrogenflow.Methodsformeasuringperformance1.SurfacecharacterisationSEM(JSM-6700F)MorphologiesofsamplesXPSChemicalcompsitioninformationContactanglemeter(JC2000C1)Watercontactangle(ambienttemperrature)2.Electrochemicalexperiments(OCP)–tcurvesEISpolarisationcurves3.5wt.%NaClRoomtemperatureThree-electrodecellFrequency(10-5~10-2Hz)OCPamplitudeofperturbationvoltage±5mVsamplewasimmersedintotestsolutionResults1:Morphologyandwettabilityof?lmWettabilityandmorphologiesof(a)bareCuandCuelectrolysedundercellvoltageof(b)5V,(c)15V,(d)30Vfor2hin0.02MHMMTE/ethanolsolution.MorphologyandwettabilityofCuelectrolysedinethanolundercellvoltageof30Vfor2h.SEM

images

of

Cu

electrolysed

with

cell

voltage

of

30V.

(a)Cu

electrolysed

for

30

min,

(b)

Cu

electrolysed

for

1h,

(c)

and

(d)

Cu

electrolysed

for

2h,

(e)substrate

after

removing

of

deposit

?lm.Results2:FilmcompositionXPS

spectra

of

?lmed

Cu.

(a)

Survey

spectra,

(b)

Cu2p

spectra.Chargeofatomsoncapsaicin.

(a)Molecularstructureand(b)

highestoccupiedmolecularorbitaldensityofHMMTE.Results3:Formationmechanismofsuperhydrophobic?lmanodicdissolutionoccursonCu,andCuatomtransfersintosolutioninformofcupricions.CupricionsthenimmediatelycombinewithHMMTEtoformcomplexSupersaturatedcomplexispronetoprecipitateonCusurface.DissolvingspeedofCuatomvarieswithitspositionforinhomogeneityofmorphologyandcompositionofsubstratepotentialisanimportantfactorthatinfluencesfilmformation.Results3:DependenceofwettabilityonmorphologyFigurestransferredfrom8dwiththresholdvaluesof(a)122,(b)150and(c)196.Results4:

Corrosionresistanceofsuperhydrophobic?lmOCP–tcurvesofbareandfilmedCuin3.5wt.%NaClsolution.EIS

results

of

bareandfilmed

Cu

in

3.5

wt.%

NaCl

solution.

(a)

Nyqui-stplots,

(b)

bode

|Z|

versus

frequen-cy

plots,

and

(c)

bode–phase

angle

versus

frequency

plots.Equivalent

circuits

for

(a)bare

and

(b)?lm