Kevlar纤维的表面处理及其复合材料界面研究

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1、武汉理工大学硕士学位论文Kevlar纤维的表面处理及其复合材料界面研究姓名：张珊珊申请学位级别：硕士专业：材料学指导教师：王钧20090501武汉理工大学硕士学位论文AbstractKevlarfibercompositeshavebeenwidelyusedinmanyimportantindustrialdepartmentswiththeadvantagesoflightweight，goodabsorptionandSOon．ButKevlarfiberhasapoorintereactionwithmatrixbecauseoftheskin·c

2、orestructure，whichbadlyweakentheperformanceofKevlarfiberincomposites．InordertogivefullplaytoexcellentmechanicalpropertiesofKevlarfiber，improvingtheinterfacialadhesionconditionofKevlarfiberreinforcedcompositehasbecomeafocusinthematerialscienceresearch．Thekeystosolvetheseproblemsare

3、thesurfacetreatmentofKevlarfiberandthedevelopmentofhi曲performanceresinmarched谢mKevlarfiberwell．Inthisthesis，theKevlarfibersweretreatedbyultravioletlight∞Ⅵ，andphosphorousacid(PA)solutionsofdifferentconcentrations．ThechangeofsurfacestructureofKevlarfibersWasstudiedbySEMandIRtechnolo

4、gy,andtheinterfacialadhesionconditionWasanalyzedandestimatedaccordingtointerfacialshearstrength(IFSS)inthesingle·fibercompositefragmentation(SFC)test．OnthebasicofthetreatmentsofKevlarfiber,theeffectsofstructureandpropertyofresinmatrixonKevlarcompositewerestudied．Theresultsshowthat

5、：throughUVtreatmentthesurfaceofKevlarfiberbecomesroughandtheintensityoffilamentreduces，whilethesurfacebecomessmoothandtheintensityincreasesafterbeingtreatedwitllPAsolution．ViaFTIRtechnology,itisnotnewabsorptionpeaktoappearanddisappear,buttherelativeintensitiesofmanyabsorptionpeaks

6、havechanged．Accordingtothesingle—fibercompositefragmentation(SFC)test，thetreatmentofultravioletlightO-w)isasimplerandmoreeffectivesurfacetreatment，compared谢mPAtreatment．Afterbeingtreatedwith30％PAsolution，interfacialshearstrength(IFSS)ofKevlarfiber／epoxycompositesreached14．27MPaand

7、increasedby34．7％，whilethroughUVtreatmenttreatedforabout8min,theinterfacialshearⅡ武汉理工大学硕士学位论文strengthofcompositesincreasedby61．3％，andwasupto17．08MPa．Incomparable谢thundaturatedpolyestersresinsandvariousvinylresins，Kevlarfiberhasabetterintereactionwitllepoxy．Keywords：Kevlarfiber；surf

8、acetreatment；single-fibercomposit