基于碳纳米管/石墨烯界面修饰的碳纤维增强复合材料中力-电耦合关系探究

Research on force-electrical coupling in carbon fiber reinforced composites based on carbon nanotube/graphene interface modification

碳纤维和树脂基体的界面性能直接决定了复合材料的应用表现。通过电化学沉积法将碳纳米管和石墨烯接枝在碳纤维表面,模拟生物体的神经网络结构形成多尺度的三维碳材料网络。随后对碳纤维复合层压板的力学和电学性能进行测试,研究发现,改性后的界面增强了碳材料与树脂基材的接触面积,有效提高了碳纤维和树脂间的界面结合力。此外,复合材料的电阻随着碳纳米管/石墨烯质量分数的增加而不断减小,并且拉伸后复合材料的电阻率比拉伸前增大,表明层压板的电阻与其表面结构存在直接关系。该研究为拓展酚醛树脂复合材料的功能化和力-电耦合应用领域提供了新思路。

The interface performance of carbon fiber and resin matrix directly determines the application performance of composite materials.In this paper,carbon nanotubes and graphene are grafted on the surface of carbon fibers by electrochemical deposition,simulating the neural networks of organisms to form a multi-scale three-dimensional carbon material network.Subsequently,the mechanical and electrical performance of the carbon fiber composite laminate was tested.It was found that the modified interface enhanced the contact area between the carbon material and the resin substrate.At the same time,the interfacial bonding force between the carbon fiber and the resin was effectively increased.In addition,the resistivity of the composite after stretching increases compared with that before stretching,which indicates that the resistance of the laminate and its surface structure exist direct relationship.This study provides a new idea for expanding the functionalization and force-electrical coupling application field of phenolic resin composites.