Improvement in mechanical properties of recycled GF prepreg with CNT reinforced composites using a spray coating method |
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Authors: | Dong-Jun Kwon Jin-Yeong Choi Pyeong-Su Shin K Lawrence DeVries |
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Affiliation: | 1. Department of Materials Engineering and Convergence Technology, Engineering Research Institute, Gyeongsang National University, Jinju 660-701, Korea;2. Department of Mechanical Engineering, The University of Utah, Salt Lake City, Utah 84112, USA |
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Abstract: | Dispersion and shape of nanoparticles, as well as interfacial conditions, add significantly to difficulties in composite manufacture. In the work reported here, an innovative method of recycling composites using out-of-date prepreg was investigated in which the carbon nanotube (CNT) on the prepreg was optimally coated. Nanocomposites utilizing the out-of-date prepreg were coated with CNT and fabricated by a sheet molding method. CNT nanofillers were observed to be uniformly dispersed on epoxy prepreg by spray coating. The mechanical and interfacial properties of these CNT coated nanocomposites were improved over those of more conventionally manufactured carbon fiber/epoxy composites. The CNT nanofillers were embedded at the epoxy and fiber interface, as a result of etching of the epoxy prepreg surface by a CNT dispersion solution which enhanced interfacial reactivity. |
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Keywords: | CNT nanofillers spray coating interface dispersion recycle |
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