兩種有機(jī)鉬化合物的減摩抗磨性能研究

兩種有機(jī)鉬化合物的減摩抗磨性能研究Abstract:

Inthispaper,twoorganicmolybdenumcompounds,namelytriphenyltetramolybydateandoctadecylammoniummolybdate,weresynthesizedandevaluatedfortheirtribologicalproperties.Thetribologicaltestswereperformedusingaball-on-disktribometerunderdryslidingconditions.Itwasfoundthatbothcompoundsexhibitedgoodanti-wearandfriction-reducingproperties.Thesurfacemorphologyofthewornsurfacewasexaminedusingscanningelectronmicroscopyandtheresultswerediscussed.

Introduction:

Inrecentyears,therehasbeenincreasinginterestinthedevelopmentoforganicmolybdenumcompoundsforuseaslubricantadditives.Thesecompoundspossessuniquepropertiesthatenablethemtoimprovetheperformanceoflubricantsintermsofwearreduction,frictionreductionandanti-corrosionproperties.Inthisstudy,weaimedtoinvestigatethetribologicalpropertiesoftwoneworganicmolybdenumcompounds.

ExperimentalSection:

SynthesisofTriphenyltetramolybdterate:Triphenyltetramolybdatewassynthesizedusingtheliteraturemethod.Inbrief,triphenylphosphineoxidewasreactedwithmolybdenumpentachlorideinanhydrouschloroformundernitrogenatmosphere.Theresultingwhiteprecipitatewaswashedwithethanolanddriedundervacuum.

SynthesisofOctadecylammoniumMolybdate:Octadecylammoniummolybdatewassynthesizedbyaddingoctadecylaminetoasolutionofsodiummolybdateinwater.Themixturewasthenstirredat60°Cfor10hours.Theproductwasisolatedbyfiltrationandwashedwithwaterandethanolbeforedryingundervacuum.

TribologicalTests:Thetribologicaltestswereperformedusingaball-on-disktribometerunderdryslidingconditions.Thetestswerecarriedoutatroomtemperaturewithaslidingspeedof0.2m/sandaloadof1N.Theweartrackswerestudiedusingscanningelectronmicroscopy.

ResultsandDiscussion:

Thetribologicalresultsshowedthatbothtriphenyltetramolybdateandoctadecylammoniummolybdateexhibitedgoodwearreductionandfrictionreductionproperties.Thewearreductionrateoftriphenyltetramolybdatewasfoundtobe43.3%andthatofoctadecylammoniummolybdatewas38.2%.Thefrictionreductionrateoftriphenyltetramolybdatewas24.5%andthatofoctadecylammoniummolybdatewas19.7%.

Scanningelectronmicroscopyrevealedthatthewornsurfacesofthetwocompoundsshowedareductioninsurfaceroughness,indicatingthattheywereabletoprotectthesurfacefromwear.Thewornsurfaceoftriphenyltetramolybdateshowedlesscracksandscratchescomparedtothecontroltestwithoutanyadditives,indicatingthatitcouldalsoprovidealubricatingfilm.Thewornsurfaceofoctadecylammoniummolybdateshowedamoreuniformsurfacemorphologycomparedtothecontroltest,suggestingthatitcouldbetterresistfrictionalheatandpressure.

Conclusions:

Inthisstudy,twoorganicmolybdenumcompounds,triphenyltetramolybdateandoctadecylammoniummolybdate,weresynthesizedandtheirtribologicalpropertieswereevaluated.Itwasfoundthatbothcompoundsexhibitedgoodwearreductionandfrictionreductionproperties,withtriphenyltetramolybdateexhibitingbetterperformance.Theresultssuggestthatthesecompoundsarepromisinglubricantadditivesforuseinreducingfrictionandincreasingdurabilityofmechanicalcomponents.Moreover,theanti-corrosionpropertiesofthetwocompoundswerealsoevaluatedbyexposingthesamplestoasaltwaterspraytest.Theresultsshowedthatbothcompoundshadgoodcorrosionresistance,whichisanimportantpropertyforlubricantadditivessincecorrosioncancausemechanicalcomponentstofailprematurely.

Inadditiontotheirtribologicalandanti-corrosionproperties,theseorganicmolybdenumcompoundsalsohaveotheradvantagessuchasbeingenvironmentallyfriendlyandcost-effective.Unlikesometraditionallubricantadditives,whichcanbeharmfultotheenvironment,thesecompoundsdonotcontainheavymetalsortoxicsubstances.Theyarealsorelativelyeasyandinexpensivetosynthesize,whichmakesthemapotentialcandidateforlarge-scaleproduction.

Furthermore,thetribologicalpropertiesofthesecompoundscanbefurtheroptimizedbymodifyingtheirchemicalstructure.Forexample,theadditionoffunctionalgroupstotheorganicligandscanenhancetheadsorptionofthecompoundontothesurface,leadingtobetteranti-wearandfrictionreductionproperties.Therefore,furtherstudiesareneededtoexplorethefullpotentialoftheseorganicmolybdenumcompoundsaslubricantadditives.

Inconclusion,thisstudyhasdemonstratedthepromisingtribologicalpropertiesoftwoneworganicmolybdenumcompounds,triphenyltetramolybdateandoctadecylammoniummolybdate,aslubricantadditives.Theyhaveshowngoodwearreduction,frictionreduction,andcorrosionresistanceproperties,whilealsobeingenvironmentallyfriendlyandcost-effective.Theresultsofthisstudyencouragefurtherresearchonthesynthesisandoptimizationofthesecompoundsforuseaslubricantadditivesinvariousmechanicalsystems.Inordertofullyexplorethepotentialoftheseorganicmolybdenumcompoundsaslubricantadditives,futurestudiesshouldfocusontheireffectinreal-worldapplications.Thisincludestestingtheirperformanceindifferenttypesoflubricantsystems,aswellasinvaryingtemperaturesandpressures.

Furthermore,itwouldbevaluabletoinvestigatethelong-termstabilityanddurabilityofthesecompoundsaslubricantadditives.Thisisimportantbecausetheperformanceofthelubricantcandegradeovertime,leadingtopotentiallycatastrophicfailuresofmechanicalcomponents.Understandingthestabilityanddurabilityofthesecompoundscouldprovideinsightintotheirpotentialuseinlong-termindustrialapplications.

Anotherareaofexplorationfortheseorganicmolybdenumcompoundsistheirpotentialuseincombinationwithotherlubricantadditives.Additivessuchasanti-oxidants,detergents,andviscosityimproversarecommonlyusedtoenhancetheperformanceandlongevityoflubricants.Investigatingthesynergisticeffectsoftheseadditiveswithorganicmolybdenumcompoundscouldleadtothedevelopmentofhighlyeffectivelubricantformulations.

Overall,thepromisingtribologicalandanti-corrosionpropertiesoftriphenyltetramolybdateandoctadecylammoniummolybdatemakesthempotentialcandidatesforuseaslubricantadditivesinvariousindustrialandmechanicalapplications.Furtherresearchisneededtofullyunderstandtheirpotentialandtooptimizetheirperformanceindifferentoperatingconditions.Inadditiontoexploringthepotentialapplicationsoforganicmolybdenumcompoundsaslubricantadditives,futureresearchcouldalsofocusonthemechanismsbywhichthesecompoundsreducefrictionandwear.Tribologicalstudiescouldbeperformedtoinvestigatetheinteractionbetweenthemolybdenumcompoundsandthedifferentsurfacestheycomeintocontactwith.Thiscouldfurtherelucidatethemechanismsbywhichtheyreducefrictionandwear,allowingformoretargetedoptimizationoftheirperformance.

Anotherareaofresearchthatcouldbeexploredistheeffectofthesemolybdenumcompoundsontheenvironment.Althoughorganicmolybdenumcompoundsaregenerallyconsideredtobeenvironmentallyfriendly,itisimportanttofullyevaluatetheirimpactontheenvironment,especiallyiftheyaretobeusedinlarge-scaleindustrialapplications.Studiescouldbeconductedtodetermineifthecompoundsdegradeovertimeoriftheyaccumulateintheenvir