航空级碳纤维增强树脂基复合材料的胶接研究进展

Research progress in adhesive bonding for aviation grade carbon fiber reinforced polymer composites

  • 摘要: 结构轻量化对于航空领域至关重要,基于轻质高强的碳纤维增强树脂基复合材料的表面处理及胶接技术需求日益增长。本文系统回顾了航空级碳纤维增强树脂基复合材料的胶接相关研究进展,介绍了现有的胶接理论、胶黏剂与仿生黏附理论、常见的复材表面处理技术,以及表界面性能和胶接性能表征方法。重点对比了模压成型与热压罐成型、热塑性复材与热固性复材、同种材料胶接与异质胶接等对最终胶接性能的影响机制。结果表明,复材成型工艺影响制得复材表面情况,应选择与表面情况匹配的胶接前表面处理方法;对于新兴的热塑性复材,由于材料自身的高韧性和表面化学惰性,较传统的热固性复材需要更高能量的表面活化处理;对于异质胶接,不可忽视胶层两侧待胶接材料的表面性质差异对胶接的影响。目前,复材胶接相关技术正朝着多样化、规模化、自动化的方向发展,未来有望形成轻量化航空构件胶接成型技术体系,在航空制造业发挥更大的作用。

     

    Abstract: Lightweight structure is crucial for the aviation industry. Hence, the demand for surface treatment and adhesive technology of lightweight and high-strength carbon fiber reinforced polymer composites is increasing. In this work, the research progress on adhesive bonding of aviation grade carbon fiber reinforced polymer composites is systematically reviewed. The classic adhesive theories, types of adhesives, biomimetic adhesive theories, general surface treatment techniques, and characterization for surface/interface performance and adhesive properties are introduced. Moreover, the influence mechanisms of compression molding and hot press molding, thermoplastic composites and thermosetting composites, and same material adhesion and heterogeneous adhesion on the adhesive performance are sufficiently discussed. The results indicate that the molding process affects the surface condition of the composites. Thus, the applied surface treatment should match the surface condition. For the emerging thermoplastic composites, higher energy of surface treatment is required compared to traditional thermosetting composites, due to their high toughness and surface chemical inertness. For heterogeneous adhesion, the influence of the surface differences of the adherends on both sides of the adhesive layer cannot be ignored. At present, the composite’s adhesive bonding technologies are developing towards diversification, scaling, and automation. In the future, it is expected to form a technology system of adhesive bonding of lightweight aviation components, which will play a greater role in the aviation manufacturing industry.

     

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