基于拉挤复合碳纤维材料的三维可视化表征分析
3D Visual Characterization Analysis Based on Pultrusion Composite Carbon Fiber Material

本文针对国产拉挤复合碳纤维材料，结合了扫描电镜表征与X射线CT扫描技术，采用圆柱体追踪法，对材料结构进行了三维重构并定量分析了拉挤碳纤维材料中的各类型纤维分层情况。研究结果表明拉挤材料是一种多层结构，其中含有三层由单根碳纤维材料组成的多轴向布材料与四层浸渍环氧树脂材料。单根碳纤维材料的直径约为7~8 μm。在多轴向布附近树脂材料倾向同一方向凝固形成细小纤维，而在树脂纤维中间，会形成新的垂直方向的细小纤维。统计数据表明树脂细小纤维在X方向的50？，180？上有明显的偏聚，且树脂细小纤维的长度分布更均一，这或与拉挤工艺、不饱和聚酯树脂的凝固方式均有关联。
In this paper, SEM characterization and X-ray CT scanning techniques were carried out for domestic carbon fiber pultrusion composite materials. The Cylinder Template Matching (CTM) method was used to reconstruct the 3D material structure and the data has been quantitatively analyzed. The results show that the pultrusion carbon fiber material is a multi-layer structure, which contains three layers of multi-axial cloth material composed of a single carbon fiber material and four layers of impregnated epoxy resin material. The diameter of a single carbon fiber material is about 7~8 μm. When it is close to multi-axial cloth material, the resin material tends to form fine fibers in the same direction, and in the middle of the resin fibers, new vertical fine fibers will be formed. Statistical data show that the fine fibers have obvious segregation at 50？ and 180？ in the X direction, and the length distribution of the resin fine fibers is more uniform than carbon fiber. This may be related to the pultrusion process and the solidification method of unsaturated polyester resins.