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http://dx.doi.org/10.7317/pk.2013.37.1.61

Effect of Anodic Oxidation of H2SO4/HNO3 Ratio for Improving Interfacial Adhesion between Carbon Fibers and Epoxy Matrix Resins  

Moon, Cheol-Whan (Department of Organic and Nano Engineering, Hanyang University)
Jung, Gun (Department of Polymer Nano Science & Technology, Chonbuk National University)
Im, Seung-Soon (Department of Organic and Nano Engineering, Hanyang University)
Nah, Changwoon (Department of Polymer Nano Science & Technology, Chonbuk National University)
Park, Soo-Jin (Department of Chemistry, Inha University)
Publication Information
Polymer(Korea) / v.37, no.1, 2013 , pp. 61-65 More about this Journal
Abstract
In this work, the anodic oxidation of carbon fibers was carried out to enhance the mechanical interfacial properties of carbon fibers-reinforced epoxy matrix composites. The surface characteristics of the carbon fibers were studied by FTIR, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Also, the mechanical interfacial properties of the composites were studied with interlaminar shear strength (ILSS), critical stress intensity factor ($K_{IC}$), and critical strain energy release rate ($G_{IC}$). The anodic oxidation led to a significant change in the surface characteristics of the carbon fibers. The anodic oxidation of carbon fiber improved the mechanical interfacial properties, such as ILSS, $K_{IC}$, and $G_{IC}$ of the composites. The mechanical interfacial properties of the composites anodized at 20% sulfuric/nitric (3/1) were the highest values among the anodized carbon fibers. These results were attributed to the increase of the degree of adhesion at interfaces between the carbon fibers and the matrix resins in the composite systems.
Keywords
anodic oxidation; composites; surface properties; mechanical interfacial properties;
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