介质阻挡放电在材料表面改性中的应用.研究

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

2、andX·raydiffraction(XRD)．Thefactorsthataffecttheplasmamodificationeffects，suchauspowerdensity,treatmenttime，andpressureintensity,werestudied．Finally,theplasmamodificationeffectsatatmosphericandlowerpressurearecompared，themechanismforDBDsurfacemodificationinairisanalyzed，and

3、reasonableexplanationsbasedonthedifferenceofthedischargemechanismanddischargecharacteristicsofDBDinairatatmosphericandlowerpressureisprovidedforunderstandingtheexperimentalresults．Resultsshowthat，theDBDplasmatreatmentinairatatmosphericandlowerpressurechangesthesurfacemorpho

4、logy，contactangleandsurfaceenergyofpolymerfilms．Andbothofthecontactangleandthesurfaceenergyachievethesaturatedvalueatcertaintreatmenttime．Thepowerdensityshowssignificantinfluenceonthetreatmenteffects．ByincreasingthepowerdensityofDBDtreatment，thelesstreatmenttimeisneededtoob

5、tainthesame仃eatmenteffects．TheAFManalysisshowthattheroughnessincreasesremarkablyafterDBDplasmatreatment．TheXPSanalysisshowthatDBDplasmatreatmentintroducesoxygen-containingandnitrogen—containingpolarfunctionalgroupsonthepolymersurfaces．AndtheXRDanalysisshowthatDBDplasmatreat

6、mentcausesmaterialsurfacepropertiesimprovementwithoutinterferingwiththebulkproperties．AsCanbeseen，underthesamepowerdensity,thelowerpressureDBDCanachievethehighertreatmentefficiencythantheatmosphericpressureDBD．Analysissuggeststhat，theseeffectscouldbeexplainedbythedifference

7、betweentheirnumberofactivespeciesavailableforreaction，whichismainlyinducedbythedifferencebetweentheirphysicalmechanismofdischarge．KEYWORDS：Non-thermalplasma；Dielectricbarrierdischarge(DBD)；Electricalcharacteristics；Lightingemissioncharacteristics；Surfacemodification；Agingef

8、fectIV目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．IABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．III第