基于芳纶pulp优化的碳纤维增强树脂基复合材料设计与性能强化研究

碳纤维增强树脂基复合材料（CFRP复合材料）因其轻质高强、耐腐蚀及良好的可设计性等优势，在军民两用领域具有巨大应用前景。本项目针对树脂基复合材料树脂粘接层脆性大且存在结构缺陷，易发生剥离和分层等突出问题，提出一种崭新的芳纶pulp薄膜增强技术，解决树脂基复合材料面临的技术瓶颈。研究芳纶pulp形成纤维桥联结构的优化工艺和引入机制；重点研究芳纶pulp对复合材料变温力学性能、抗损伤性能及残余力学性能的作用规律；研究复合材料失效模型的演变规律，揭示芳纶pulp对层间粘接性能的增强机制；探究CFRP复合材料的设计、可控制备和性能调控等科学问题，构建“材料设计-制备工艺-性能强化”的高性能CFRP复合材料优化设计体系，发展简单高效的复合材料强化技术。研究工作将为开发CFRP复合材料增强技术奠定创新性基础，推动高性能CFRP复合材料在重大科技创新与产业转型升级领域的发展及应用。

Carbon fiber reinforced plastic composites (CFRPs) have the huge application prospect in military and civilian fields due to their lightweight and high strength, corrosion resistance and good designability, etc. Aiming at main issues including large brittleness of resin adhesive layer, structural defect of CF/resin adhesive interface, prone to peeling and delamination, this project proposes a novel aramid pulp (AP) ultra-thin film toughening technique to solve the technical bottleneck of resin-based laminated composites. The project focuses on studying the optimized methods and introduction mechanism of formed AP ultra-thin film between plies. The effect law of AP on mechanical properties, resistance to mechanical damage, and residual mechanical properties of CFRPs after damage are studied. The failure mode evolution law of CFRPs is studied, and enhancement mechanism of AP to interlayer adhesive property is revealed. The key scientific issues containing material design, controllable preparation, and performance control of high-performance CFRPs will be discussed, an optimized design system of “Material Design-Manufacturing Process-Performance enhancement” for high performance CFRPs will be established, the simple and efficient interlayer reinforcement technique of CFRPs will also be developed. The relevant researches will establish an innovative theoretical foundation for creating an enhancement technique of high performance CFRPs, and promote the development and application of high-performance CFRPs in major technological innovation and industrial transformation and upgrading.