Abstract The performance of carbon fiber (CF) reinforced composites depend greatly on the interfacial structures of the fibers and matrix. Based on the problem, we proposed a novel and efficient method to improve their interfacial combination. Polydopamine (PDA) transition layer was coated on the CF by dip coating process, followed by growth of β-FeOOH on single CF, and then polyimide (PI) was introduced by immersion method. β-FeOOH with a special tetrahedral structure enabled more PI matrix to be embedded in the grooves, increasing the surface roughness of CF and contact area with PI. After modifying by PDA and β-FeOOH, the tensile strength and modulus of the composite increased by 46% and 35%, respectively. In addition, tribology test verified that the better wear rate was obtained after introducing PDA and β-FeOOH. All results proved the better reinforcing effect than the unmodified ones. This means that an alternative CF reinforced composites with high strength and wear resistance was developed.

中文翻译：

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碳布/聚酰亚胺复合材料中聚多巴胺/FeOOH改性界面以改善机械/摩擦学性能

摘要 碳纤维（CF）增强复合材料的性能在很大程度上取决于纤维和基体的界面结构。基于这个问题，我们提出了一种新颖有效的方法来改善它们的界面组合。通过浸涂工艺将聚多巴胺（PDA）过渡层涂覆在 CF 上，然后在单个 CF 上生长 β-FeOOH，然后通过浸渍法引入聚酰亚胺（PI）。具有特殊四面体结构的β-FeOOH使更多的PI基体嵌入凹槽中，增加了CF的表面粗糙度和与PI的接触面积。经PDA和β-FeOOH改性后，复合材料的拉伸强度和模量分别提高了46%和35%。此外，摩擦学测试证实，引入PDA和β-FeOOH后获得了更好的磨损率。所有结果都证明了比未改性的更好的增强效果。这意味着开发了一种具有高强度和耐磨性的替代 CF 增强复合材料。