Surface characterization of carbon fibres and interfacial properties of carbon fibre composites |
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| Affiliation: | 1. School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, South Korea;2. Korea Science Academy of KAIST, Busan 614-100, South Korea;3. Department of Chemical Engineering, Pukyong National University, Pusan 608-739, South Korea;1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2. University of Chinese Academy of Science, Beijing 100049, China;1. NANO-ElecTronic Centre, Faculty of Electrical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia;2. NANO-SciTech Centre, Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia;3. Facuty of Electrical Engineering, UiTM Sarawak, Kampus Kota Samarahan, Jalan Meranek, Sarawak, Malaysia;1. University POLITEHNICA of Bucharest, Research Centre for Environmental Protection and Eco-friendly Technologies, Polizu 1, RO-011061, Bucharest, Romania;2. University POLITEHNICA of Bucharest, Faculty of Applied Chemistry and Materials Science, Inorganic Chemistry, Physical Chemistry and Electrochemistry Department, Polizu 1, RO-011061, Bucharest, Romania |
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| Abstract: | The surface characteristics of carbon fibres treated by electrochemical oxidation have been determined, and the effect of these properties on the interfacial adhesive strength (interlaminar shear strength (ILSS) and transverse flexural strength) of epoxy-matrix composites investigated. The surface properties of the carbon fibres were dependent on the nature of the electrolyte used during the electrochemical oxidative treatment. Use of a basic electrolyte resulted in an improvement of composite ILSS and transverse flexural strength due to an increase in the number of surface functional groups. On the other hand, using an acid electrolyte resulted in the ILSS increasing with the number of surface functional groups, while the transverse flexural strength decreased for composites in which the carbon fibres had a high surface oxygen content. It is concluded that the weak boundary layer derived from fissures on the surface of carbon fibres treated in an acid electrolyte decreased the transverse flexural strength. |
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