两种T700碳纤维的微观结构与性能研究

Research on Microstructure and Properties of Two Kinds of T700 Carbon Fibers

采用原子力显微镜(AFM)、扫描电镜(SEM)、拉曼光谱(Raman)、X射线衍射(XRD)和透射电镜(TEM)对国产JHT45-T700和日本东丽T700两种碳纤维的硬度相对大小、表面和断面形貌、石墨化程度和微晶结构进行了表征,分析了其中的差异。结果表明,东丽T700微区硬度大于国产JHT45-T700;国产JHT45-T700表面存在大量沟槽,而东丽T700表面光滑。因此,国产JHT45-T700与树脂基体的浸润性优于东丽T700。Raman与XRD分析表明,东丽T700石墨化程度、微晶尺寸和结构的有序程度均高于国产JHT45-T700;TEM显示,东丽T700晶格条纹比国产JHT45-T700更规整些,晶相较多,石墨微晶发育相对更完善。

The relative size of hardness,the surface and fracture morphology,the degree of graphitization and microcrystalline structure of Domestic JHT45-T700 and Toray T700 carbon fibers were investigated by atomic force microscopy(AFM),scanning electron microscopy(SEM), Raman spectroscopy, X-ray diffraction(XRD)and transmission electron microscope(TEM).The microstructure differences of the two carbon fibers were compared.Results showed that the hardness of Toray T700 was greater than Domestic JHT45-T700.The surface of Toray T700 was smooth.Domestic JHT45-T700 possessed of better wetting property with resin matrix due to many prominent grooves on the surface.Raman and XRD results indicated that the degree of graphitization,the size of crystallite and the order degree of Toray T700 were superior to Domestic JHT45-T700.The lattice fringe of Toray T700 was more orderly,the proportion of crystalline phase was larger and graphite crystallite grew more perfect.