国产高强中模碳纤维及其增强高韧性树脂基复合材料研究进展

Progress in high strength intermediate modulus carbon fiber and its high toughness resin matrix composites in China

高强中模碳纤维增强复合材料是当前及未来相当长时期内主要的航空结构复合材料。借鉴国外高强中模碳纤维及其高韧性复合材料发展经验,在国内高强型碳纤维复合材料成熟经验的基础上,实现了高强中模T800级碳纤维规模化生产,系统分析了与国产高强中模碳纤维匹配的树脂基体、预浸料及其复合材料技术现状。国产T800H级碳纤维增强高韧性环氧树脂基和双马树脂基复合材料抗冲击性能达到国外同类复合材料的水平,高韧性环氧树脂基复合材料的耐湿热性能优于国外同等韧性的复合材料。国产T800H级碳纤维增强高韧性复合材料预浸料具有优异的工艺性能,可同时满足手工铺贴、自动铺带和自动铺丝3种铺放工艺要求。在T800级复合材料成熟应用的基础上,未来主要发展高压缩强度、高模量和基于BVID的高冲击韧性高强中模碳纤维复合材料。

High strength intermediate modulus carbon fiber composites are still the main aviation composites in the world at present and for a long time to come.In recent year,based on the experience of high-strength carbon fiber composites,the industrialization technology of high strength intermediate modulus T800 grade carbon fiber have been broken through in China,and the resin matrix,prepreg and manufacturing process were analysized systematically for the high toughness composites reinforced by Chinese T800 grade carbon fiber.The impact resistance of the resin matrix composites reinforced by Chinese T800H grade carbon fiber is at the same level with that of foreign composites,and the hydrothermal resistance of high toughness epoxy resin matrix composites is better than that of foreign composites with the same CAI level.At the same time,the prepreg of Chinese T800H grade carbon fiber reinforced high toughness composites has excellent process ability,and it can meet the requirements of manual-layup,ATL and AFP.Based on the T800 grade composites,the main research goal is to improve the compression mechanical properties,elastic modulus and CAI based on BVID(barely visible impact damage)for high strength intermediate modulus carbon fiber composites in the future.