3D打印2(英文版)

LasergainmaterialprintinglargepatterngrapheneTeammembers:GuLinaRenTianxinZhaoXuAboutlaserincreasematerialmanufacturing―3DprintingAboutgraphemeAboutlaserincreasetoprintgrapheneLet’sgoandlearnsomethingaboutthe3Dprintingtechnology……Whatisa3Dprinting?Definitionof3DprintingPrincipleof3DprintingThemacro3DprintingMicro/nanograde–3DprintingApplicationof3DprintingtechnologyThedevelopmentof3DprintingtechnologyInrecentyears,infrontofeveryonetherewasacoolnewword-3Dprinting.Although3Dprintingisstillabigdistancewithourlife,butthrough3Dprinting,whichcanbesuccessfullyprinttheunmannedaircraft,bicycles,carsandotherphysicalobjects.3Dprintinghasgraduallybegantobeusedbysomecompanies.Whatisa3Dprinting?Thetechnologyoflaserrapidprototypingcommonlyknownas3Dprinting,whichisakindofgetridoftraditionalcuttingtool,fixtureandmachinetoolprocessing,accordingtothepartsoronlyobjectsof3DCADmodeldata,bymoldingequipmentmadeintheformofmaterialaccumulationtechnologyofphysicalmodel.By3Dprintersthepartsprocessinghasamolding,cleantheadvantagesofnochip,butthedrawbackislowintensity,lowspeed,lowaccuracyandthecostistoohigh.Whatisa3Dprinting?Definitionof3DprintingThetechnologyoflaserrapidprototypingcommonlyknownas3Dprinting.Itisakindofgetridoftraditionalcuttingtool,fixtureandmachinetoolprocessing,whichaccordingtothepartsoronlyobjectsofCAD3Dmodeldata,bymoldingequipmentmadeintheformofmaterialaccumulationtechnologyofphysicalmodel.By3Dprintersthepartsprocessinghasamolding,cleantheadvantagesofnochip,butthedrawbackislowintensity,lowspeed,lowaccuracyandthecostistoohighandsoon.Principleof3Dprinting3Dprintingandlasermoldingtechnology,usingthesuperpositionofprocessing,tocompletethemold3dentitytoprint.Eachlayeroftheprintingprocessintwosteps,firstofallinneedofmoldingareasprayedwithalayerofspecialglue,gluedropletitselfisverysmall,andnoteasytospread.Andthenalayerofpowderspraying,powdermetquicklycuringadhesiveglue,andnogluearearemainloosestate.Thisunderalayerofalayerofgluepowderalternation,entitymodelwillbeprint,aftertheprintaslongasremovingloosepowdercanbeplanemodel,andtherestofthepowdercanberecycled.Principleof3DprintingThemacro3DprintingMicro/nanograde–3DprintingTwo-photonpolymerization(2pp)Micro/nanograde–3DprintingEyeofaneedleMicro/nanograde–3DprintingThisisahairMicro/nanograde–3DprintingTheheadofant'sApplicationof3DprintingtechnologyThetechnologyhasbeenwidelyusedinmanyfields,suchasjewelry,footwear,industrialdesign,architecture,engineeringandconstruction(AEC),automotive,aerospace,dentalandmedicalindustry,education,geographicinformationsystems,civilengineering,gunsandotherfields.Thelaser3DprintingmedicalcomponentinstanceActualReseachTopicsVariousMaterial:BioresorbableBoneimplantscompositematerial3DbicycleThevaseof3DprintingArobotprintedoutbyastudenttotakecareoftheelderLet’sgoandlearnsomethingaboutgraphene……Graphene---TheTwo-DimensionalNanomaterialAsinglelayerthickness0.34nmConsistingofasinglelayerofcarbonatomsarrangedtightlytwo-dimensionalcellularstructure,thebasicunitofbuildingothercarbonaceousmaterials.Graphene---TheTwo-DimensionalNanomaterialTheexcellentpropertiesofgrapheneMechanicalproperties:Young'smodulus：1100GpaStrength:125GpaElongation:25%Electricalproperties:Electronmobility：200000cm2/(vs)Conductivity:108(sm-1)Surfaceresistance:30Ω/sqOpticalpropertiesLighttransmittance：97.7%Opticalproperties:Thermalconductivity：5000w/(mk)Thermalproperties:KostyaNovoselovAndreGeimInOctober5,2010,TheygetNobelprizeinphysicsbyfoundingthegraphene.Goodpotentialapplicationofgraphene--BatterymaterialsIntegratedcircuitReinforcedcompositesTouchscreen--GrapheneFamilyHighthermalconductivitylargesurfaceareaAcertaintransparencyGoodtoughnessHighstrengthHighchemicalstabilityHighconductivityHydrogenstoragematerialSpaceelevatorSensitivedevicedetectorBulletproofvestsHighfrequencytransistorSignalamplifierEfficientradiatorTEMAccessoriesLet’sgoandlearnsomethingaboutlaserinteractionwithgraphene……Graphenepreparationmethodmicromechanicalcleavage;机械剥离法：质量高、微尺度、产率低chemicalreductionofexfoliatedgrapheneoxide;氧化石墨还原法：批量、掺杂改性chemicalvapordeposition(CVD)化学气相沉积法：质量较高、面积较大Basalpyrolysismethod基底高温热解法：质量高、温度高、层数难控micromechanicalcleavagechemicalreductionofexfoliatedgrapheneoxideBasalpyrolysismethodchemicalvapordeposition(CVD)laser+grapheneCouldthelaserbegrowngrapheneinfreespace?•WEfoucusonlaserinteractionwithgraphene:•1.Tofabricatelargearea,patternedandhighqualitygoraphene;•2.Toimprovegrapheneproperties;•3.Toexploregrapheneapplications.laserdensity:1.87X103Wcm-2scanningrate:18cmmin-1size:16mmX2mmgrowthrate:28.8cm2min-1LaserprintingpatterngrapheneLaserprintedgraphenecircuitsBYEbyethanksalot