国产T700级碳纤维及复合材料性能表征

Characterization of domestic T700grade CF and composite

研究了两种国产T700级碳纤维微观形貌以及相应的环氧树脂基复合材料的基本力学性能,并与日本东丽T700碳纤维进行比较。结果发现,与表面光滑的东丽T700碳纤维相比,国产碳纤维表面有颗粒附着,呈凹凸不平的形貌;国产Ⅰ型和东丽碳纤维较国产Ⅱ型碳纤维的力学性能稳定性更好,国产Ⅰ型碳纤维与东丽纤维力学性能数据相近,其中国产Ⅰ型碳纤维复合材料拉伸强度为2323MPa、拉伸弹性模量为143GPa、弯曲强度为2327MPa、弯曲弹性模量为140GPa。

The micro-morphology of two kinds of domestic T700grade carbon fibers(CF)and the basic mechanical properties of the corresponding epoxy resin matrix composites were studied.Compared with the Toray T700 CF,two kinds of domestic CF and composites could realize the comprehensive and systematic evaluation of the properties.The conclusions were as follows:first,compared with the smooth surface of Toray T700,the surface of domestic CF had granular adhesion and uneven appearance.Meanwhile the mechanical properties of domestic typeⅠand Toray CF were better than those of domestic typeⅡ.The mechanical properties of domestic typeⅠwere similar to those of Toray,and the difference was less than 2%.The tensile strength,elastic modulus,flexural strength and flexural modulus of domestic typeⅠcomposites were 2323MPa,143GPa,2327MPa and 140GPa respectively.