高性能T800碳纤维复合材料树脂基体

High-performance resin matrix for T800 carbon fiber composites

在分析T800碳纤维表面上胶剂的基础上,系统研究了适用于制备高性能T800碳纤维复合材料的树脂基体,测试了树脂浇注体及其复合材料的力学性能和热机械性能,研究了树脂基体对T800碳纤维复合材料界面性能的影响。结果表明,T800碳纤维表面上胶剂中酯基含量较高,与缩水甘油酯类环氧树脂有良好的界面相容性,经复配和优化的树脂体系其T800碳纤维复合材料的层间剪切强度达到138 MPa,NOL环拉伸强度达到2530MPa,玻璃化温度(Tg)达到213℃,具有优异的界面性能和耐热性能。

High-performance carbon fiber has been widely used in commercial and military fields because of its high strength, light weight and high stiffness. However, the application of higher performance carbon fiber （e. g. T800） would cause worse mechanical performances because of the extreme inertness of its surface caused by the alignment of graphitic crystallites. In order to produce the high-performance resin matrix, which can bond T800 carbon fiber （CF） well, the sizing of T800 CF was analyzed. The effect of resin matrix＇s structure and property on T800 CF composite was studied based on the analysis. Meanwhile, of the resin and its carbon fiber composite were analyzed. the mechanical property and thermal mechanical property The results show that T800 sizing possesses high content of ester, which can possess excellent interfacial properties with glyceride epoxy. With the help of the optimized resin system, the T800 CF composite possesses excellent interfacial properties and heat-resistance properties. The interlaminar shear strength （ILSS） of the composite is 138 MPa, the tensile strength of NOL rings is 2530 MPa, and the glass transition temperature （Tg） is 213 ℃.