碳纤维复合材料的界面性能对其整体力学性能至关重要,而碳纤维表面惰性导致的弱界面结合是当前的研究难点。纳米材料的精准设计与可控组装成为目前碳纤维复合材料界面研究的焦点。系统综述了化学接枝和物理涂层两类碳纤维复合材料的界面改性方法,重点分析了形貌特异性纳米材料的增强机制及对碳纤维复合材料界面性能的影响。通过分析形貌特异性纳米材料的改性机制,总结出颗粒状纳米材料通过高比表面积和均匀分布提升界面锚定密度;纤维状纳米材料通过三维网络结构优化应力传递与裂纹抑制;层状纳米材料则通过仿生堆叠设计缓解团聚并提高韧性。此外,指出现有形貌特异性纳米材料研究仍存在工艺复杂及功能单一等问题,并提出未来需开发高效温和的改性工艺,设计开发多级结构纳米材料,赋予复合材料多功能特性,并建立涵盖力学性能与长期稳定性的综合评价体系,推动高性能碳纤维复合材料从基础研究迈向工程化应用。
The interfacial performance of carbon fiber composites plays a critical role in determining their overall mechanical properties.However,the weak interfacial bonding caused by the inert surface of carbon fibers remains a significant challenge in current research.The precise design and controllable assembly of nanomaterials have emerged as key focuses in the current research on the interfaces of carbon fiber composites.This review provided a systematic review of two primary interfacial modification approaches for carbon fiber composites:chemical grafting and physical coating.It focused on analyzing the reinforcement mechanisms morphology-specific nanomaterials and their impact on the interfacial performance of carbon fiber composite materials.Through an in-depth examination of the modification mechanisms of morphology-specific nanomaterials,it was concluded that particulate nanomaterials enhanced interfacial anchoring density via their high specific surface area and uniform distribution;fibrous nanomaterials optimized stress transfer and crack inhibition through the formation of a three-dimensional network structure;and layered nanomaterials mitigated agglomeration and improved toughness through biomimetic stacking design.Furthermore,this paper highlighted that existing studies on morphology-specific nanomaterials faced challenges such as complex processes and limited functionality.Future efforts should focus on developing efficient and mild modification techniques,designing multi-level structured nanomaterials to impart multifunctional properties to composites,and establishing a comprehensive evaluation system that encompassed both mechanical performance and long-term stability,facilitating the transition of high-performance carbon fiber composites from fundamental research to practical engineering applications.
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