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Effects of Sizing Treatment of Carbon Fibers on Mechanical Interfacial Properties of Nylon 6 Matrix Composites  

Park, Soo-Jin (Department of Chemistry, Inha University)
Choi, Woong-Ki (Jeonju Institute of Machinery and Carbon Composites)
Kim, Byung-Joo (Jeonju Institute of Machinery and Carbon Composites)
Min, Byung-Gak (Department of Polymer Science and Engineering, Chungju National University)
Bae, Kyong-Min (Department of Chemistry, Inha University)
Publication Information
Elastomers and Composites / v.45, no.1, 2010 , pp. 2-6 More about this Journal
Abstract
The sizing treatments of PAN-based carbon fiber surfaces were carried out in order to improve the interfacial adhesion in the carbon fibers/nylon6 composite system. The parameter to characterize the wetting performance and surface free energy of the sized fibers were determined by a contact angle method. The mechanical interfacial properties of the composites were investigated using critical stress intensity factor ($K_{IC}$). The cross-section morphologies of sized CFs/nylon6composites were observed by SEM. As the experimental results, it was observed that silane-based sizing treated carbon fibers showed higher surface free energies than other sizing treatments. In particular, the KIC of the sizing-treated carbon fibers reinforced composites showed higher values than those of untreated carbon fibers-reinforced composites. This result indicated that the increase in the surface free energy of the fibers leads to the improvement of the mechanical interfacial properties of carbon fibers/nylon6 composites.
Keywords
carbon fibers; nylon6; interfacial mechanical; properties; sizing treatment;
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