| 초록 |
γ-ray treatment of polyacrylonitrile (PAN)-based carbon fibers was carried out to improve the surface polarity of the fibers as a function of the γ-ray power. The surface properties of carbon fibers were characterized using FT-IR, XPS, and dynamic contact angle measurements. The mechanical interfacial properties of the composites were investigated using ILSS and impact tests. As experimental results, it was observed that the γ-ray treatment of the fibers led to an increase of oxygen functional groups in the context of FT-IR and XPS measurements. Also, the wetting of the fibers and the mechanical interfacial properties of the composites were strongly increased with the increase of the γ-ray power, as revealed by the contact angle measurements and mechanical tests. These facts were indicated that γ-ray treatment led to the improvement in the adhesion between the fibers and matrix, resulting in the enhancement of mechanical interfacial properties of the resulting composites.
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