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- 2017
激光改性纤维对其增强环氧树脂复合材料力学性能的影响
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Abstract:
利用激光对玻璃纤维、玄武岩纤维和碳纤维进行表面改性后，以环氧树脂为基体，分别制备三种纤维增强环氧树脂复合材料。利用SEM和万能试验机对表面改性前后的碳纤维形态、力学性能及三种纤维/环氧树脂复合材料的力学性能和断面形貌进行表征，研究了纤维激光表面改性对三种纤维及其增强环氧树脂复合材料力学性能的影响。结果表明：激光表面改性对碳纤维/环氧树脂复合材料的力学性能提升最高，其拉伸强度最大提高了77.06%，冲击强度最大提高了31.25%，玄武岩纤维/环氧树脂复合材料的力学性能提升次之，而玻璃纤维/环氧树脂复合材料的力学性能有所下降。因此，激光进行表面改性适用于碳纤维和玄武岩纤维。 The glass fiber, basalt fiber and carbon fiber surface were modified by laser, and three kinds of fiber/epoxy resin composites were prepared. The surface morphology and the mechanical properties of three kinds of fiber as well as the mechanical properties and the fracture morphology of three kinds of fiber/epoxy resin composites were characterized by SEM and universal testing machine. The effects of surface modification on the mechanical properties of the composites were studied. The results show that the laser surface modification of fibers can enhance the mechanical properties of carbon fiber/epoxy resin composite to the highest, in which the maximum tensile strength increases by 77.06% and the impact strength increases by 31.25%, while the improvement for basalt fiber/epoxy resin composites take the second place, however, the mechanical properties of glass fiber composites decrease. So the carbon fiber and basalt fiber are suitable for the surface modification by laser.
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