简介：Inthispaper,polyimide(PI)filmsaremodifiedusinganatmosphericpressureplasmageneratedbyadielectricbarrierdischarge(DBD)inargon.SurfaceperformanceofPIfilmanditsdependenceonexposuretimefrom0sto300sareinvestigatedbydynamicwatercontactangle(WCA),fieldemissionscanningelectronmicroscopy(FESEM),andFouriertransforminfraredspectroscopyinattenuatedtotalmultiplereflectionmode(FTIR-ATR).ThestudydemonstratesthatdynamicWCAexhibitsaminimumwith40splasmatreatment,andevenlydistributednano-dotsandshadowconcavesappearedfor40sand12sArplasmatreatmentindividually.AshortperiodofplasmamodificationcancontributetothescissionoftheimideringandtheintroductionofC-OandC=O(-COOH)bydetailedanalysisofFTIR-ATR.

简介：DyeingofPETmaterialsbytraditionalmethodspresentsseveralproblems.Plasmatechnologyhasreceivedenormousattentionasasolutionfortheenvironmentalproblemsrelatedwithtextilesurfacemodifications,andtherehasbeenarapiddevelopmentandcommercializationofplasmatechnologyoverthepastdecade.Inthiswork,thesynergisticeffectofatmosphericpressureplasmaonalkalineetchinganddeepcoloringofdyeingpropertiesonpolyethyleneterephthalate(PET)fabricsandfilmswasinvestigated.ThetopographicalchangesofthePETsurfacewereinvestigatedbyatomicforcemicroscopy(AFM)images,whichrevealedasmoothsurfacemorphologyoftheuntreatedsamplewhereasahighsurfaceroughnessfortheplasmaand/oralkalinetreatedsamples.TheeffectsofatmosphericpressureplasmaonalkalineetchingofthestructureandpropertiesofPETwereinvestigatedbymeansofdifferentialscanningcalorimetry(DSC),themainobjectiveofperformingDSCwastoinvestigatetheeffectoftheplasmapre-treatmentontheT_gandT_m.UsingatensilestrengthtesterYG065HandfollowingastandardprocedurethemaximumforceandelongationatmaximumforceofPETmaterialswasinvestigated.Oxygenandargonplasmapre-treatmentwasfoundtoincreasethePETfabricweightlossrate.ThecolorstrengthofPETfabricswasincreasedbyvariousplasmapre-treatmenttimes.ThepenetrationofplasmaandalkalinereactivespeciesdeepintothePETstructureresultsinbetterdyeabilityandleavesasignificanteffectontheK/Svaluesoftheplasmapre-treatedPET.Itindicatedthatplasmapre-treatmenthasagreatsynergisticeffectwiththealkalinetreatmentofPET.

简介：Thesurfacedielectricbarrierdischarge(SDBD)plasmaactuatorhasshowngreatpromiseasanaerodynamicflowcontroldevice.Inthispaper,theencapsulatedelectrodewidthofaSDBDactuatorischangedtostudytheairflowaccelerationbehavior.Theeffectsofencapsulatedelectrodewidthontheactuatorperformanceareexperimentallyinvestigatedbymeasuringthedielectriclayersurfacepotential,time-averagedionicwindvelocityandthrustforce.Experimentalresultsshowthattheairflowvelocityandthrustforceincreasewiththeencapsulatedelectrodewidth.Theresultscanbeattributedtothedistinctplasmadistributionatdifferentencapsulatedelectrodewidths.