不锈钢多巴胺复合膜的制备与抗蚀性能的分析

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1、'一-·●一l--‘J—lResearcIIOnoreparationoldopaminecornPositeIllmsonstainlesssteelandcorrosionresistanceAbstractMetalcorrosionisaveryconlinonphenomenonindifferentfieldsofnationaleconomy．Theproblemsinducedbycorrosionexistatvariouspositionswherethematerialscouldbeused．Thestainlesssteelisoneofthemostwid

2、elyusedmetalsinthedailylife，agriculture—industrialproduction，andSOforth．However,the“stainless'’isrelative．Thestainlesssteelcanberustedatcertainconditions，especiallyinthestrongcorrosionmediumsuchasseawater．Thecorrosionofstainlesssteelcouldbringseriousfinanciallossestolifeandproduction．Hence，thec

3、orrosionandprotectionofstainlesssteelisafundamentalresearchsubjecttobesolvedintherelatedfields．Surfacemodificationisaprettyimportantmethodtoimprovethecorrosionresistance．Itisameaningfulresearchtopreparestrongadhesiveandenvironmentfriendlyfilmsonstainlesssteelsurface．Inspiredbythebio-adhesionpri

4、nciple，dopaminewaschosenastheresearchobject,whichhasthesamestructurefunctionalgroupofthemusseladhesiveproteinssecretedbymussels．ThepolydopaminefilmsWerefabricatedbydippingthestainlesssteelsubstrateintoanaqueousalkalinedopaminesolution．Thepossiblereactionmechanismandtemperatureeffectwerealsostud

5、ied．Themembraneswerecharacterizedbyscanningelectronmicroscope(SEM)，energydispersiveX-rayspectroscopy(EDS)，surfacereflectionFouriertransforminfraredspectrum(SR-FTIR)，UV-visiblespeetrurn．SEMshowssimilarmorphologiesofpolydopaminefilmspreparedat24"Cand34。C．Theycovertheentiresurfacoandformisland-lik

6、estructureinlocalarea．BothEDSanalysisandSR-FTIRspectrademonstratethesimilaritybetweenthepolydopaminefilmspreparedatdifferenttemperatures．Meanwhile，theresultsofUV-visiblespectrumimplythatthepolydopaminefilmpreparedat34"Cismuchthicker,whichsupportswelltheEDSresults．BasedontheGaussian98program，the

7、polymerizationreactionsofdopamineinsolutionwere1IIanalyzedbytheLUMOenergies，simulatedinfraredspectrumandHOMO—LUMOenergygapsofselectedstructuremodelscalculation．Thecalculationresultsexplainwellthepreferablechangefromdopaminemolecul