介质阻挡放电在材料表面改性中的应用.研究 (1)

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1、usingnon-thermalplasmageneratedbyDBDinairatatmosphericandlowerpressure，andthesurfacepropertiesoftheuntreatedandpost-treatedsamplesarecharacterizedbymeansofcontactanglemeasurement，scanningelectronmicroscopy(SEM)，atomicforcemicroscopy(AFM)，X-rayphotoelect

2、ronspectroscopy(xPs)，andX·raydiffraction(XRD)．Thefactorsthataffecttheplasmamodificationeffects，suchauspowerdensity,treatmenttime，andpressureintensity,werestudied．Finally,theplasmamodificationeffectsatatmosphericandlowerpressurearecompared，themechanismfo

3、rDBDsurfacemodificationinairisanalyzed，andreasonableexplanationsbasedonthedifferenceofthedischargemechanismanddischargecharacteristicsofDBDinairatatmosphericandlowerpressureisprovidedforunderstandingtheexperimentalresults．Resultsshowthat，theDBDplasmatre

4、atmentinairatatmosphericandlowerpressurechangesthesurfacemorphology，contactangleandsurfaceenergyofpolymerfilms．Andbothofthecontactangleandthesurfaceenergyachievethesaturatedvalueatcertaintreatmenttime．Thepowerdensityshowssignificantinfluenceonthetreatme

5、nteffects．ByincreasingthepowerdensityofDBDtreatment，thelesstreatmenttimeisneededtoobtainthesame仃eatmenteffects．TheAFManalysisshowthattheroughnessincreasesremarkablyafterDBDplasmatreatment．TheXPSanalysisshowthatDBDplasmatreatmentintroducesoxygen-containi

6、ngandnitrogen—containingpolarfunctionalgroupsonthepolymersurfaces．AndtheXRDanalysisshowthatDBDplasmatreatmentcausesmaterialsurfacepropertiesimprovementwithoutinterferingwiththebulkproperties．AsCanbeseen，underthesamepowerdensity,thelowerpressureDBDCanach

7、ievethehighertreatmentefficiencythantheatmosphericpressureDBD．Analysissuggeststhat，theseeffectscouldbeexplainedbythedifferencebetweentheirnumberofactivespeciesavailableforreaction，whichismainlyinducedbythedifferencebetweentheirphysicalmechanismofdischar

8、ge．KEYWORDS：Non-thermalplasma；Dielectricbarrierdischarge(DBD)；Electricalcharacteristics；Lightingemissioncharacteristics；Surfacemodification；AgingeffectIV目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．IABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．III第