中间相沥青族组成及预氧化对CC复合材料性能的影响.docx

中间相沥青族组成及预氧化对CC复合材料性能的影响
中间相沥青族组成及预氧化对CC复合材料性能的影响
摘要：
本文研究了中间相沥青族组成及预氧化对碳纤维/环氧树脂（CC）复合材料性能的影响。通过采用不同含有量的中间相沥青族化合物及不同处理温度的氧化处理，制备了多种样品。测试结果表明，中间相沥青族化合物可以促进碳纤维与环氧树脂之间的结合，并显著提高了复合材料的力学性能。同时，预氧化处理能够增强中间相沥青族化合物与环氧树脂之间的作用力，使得复合材料的力学性能得到进一步提高。此外，预氧化处理还能够改善材料的耐热性和耐氧化性能。
关键词：
中间相沥青族化合物，预氧化处理，碳纤维/环氧树脂复合材料，力学性能，耐热性，耐氧化性能
Introduction:
Carbonfiber/epoxyresin(CC)compositesarewidelyusedinaerospace,automotive,andotherindustriesduetotheirexcellentmechanicalproperties.However,theweakinterfacialbondingbetweenthecarbonfiberandtheepoxyresinlimitstheoverallperformanceofthecompositematerials.Theuseofintermediatephasepitch(IPP)asaninterfacialmaterialhasbeenfoundtobeeffectiveinimprovingtheinterfacialbondingandenhancingthemechanicalpropertiesoftheCCcomposites.
Inthisstudy,weinvestigatetheeffectofIPPcompositionandoxidativepre-treatmentonthemechanicalandthermalpropertiesofCCcomposites.TheobjectiveistounderstandtheroleofIPPincontributingtotheinterfacialbondingandtoexplorethepotentialofoxidativepre-treatmentinenhancingtheIPP-epoxybondingandimprovingtheoverallpropertiesoftheCCcomposites.
Experimentalmethods:
TheCCcompositeswerefabricatedusingcarbonfiberfabricandbisphenolAdiglycidyletherepoxyresin(DGEBA)withdifferentIPPcontent,rangingfrom0%to20%byweight.TheIPPusedinthisstudywasacommercialproductwithasofteningpointof300°Candamesophasecontentof75%.TheepoxyresinwasmixedwithIPPatroomtemperature,andthenthecarbonfiberfabricwasimpregnatedwiththemixturebyvacuuminfusion.Aftercuringat120°Cfor24hours,theCCcompositeswereobtained.
Toinvestigatetheeffectofoxidativepre-treatmentontheIPP-epoxybonding,arangeofsampleswerepreparedbytreatingtheIPP-DGEBAmixtureatdifferenttemperatures(150-300°C)fordifferentdurations(1-4hours)underairatmosphere.ThetreatedIPP-DGEBAmixtureswerethenusedtofabricatetheCCcompositesasdescribedabove.
ThepreparedCCcompositesweresubjectedtomechanicaltests,includingtensile,flexural,andinterlaminarsheartests,usingauniversaltestingmachine.Thethermalpropertieswereevaluatedbythermalgravimetricanalysi