Application of supercritical water for green recycling of epoxy-based carbon fiber reinforced plastic
- Application of supercritical water for green recycling of epoxy-based carbon fiber reinforced plastic
- 박민; 정용채; 김재우; 양범주; 김영오; 김영남; 김성륜
- Issue Date
- Composites science and technology
- VOL 173-72
- The objective of this study is to fabricate conductive carbon fiber composites with thermal and electrical properties by degradation carbon-fiber-reinforced plastics (CFRPs) and recycled carbon fibers using only supercritical water without any catalyst or oxidant. We focused on a recycling method that is harmless to the human body and environment-friendly, by using supercritical fluid water rather than recycling CFRP by physical or pyrolysis methods. In particular, we recycled carbon fibers (R-CFs) in which up to 99.5% of epoxy resin was removed, by optimizing the conditions of supercritical fluid water (SCF-W) treatment, and we fabricated conductive R-CFs composites with thermal and electrical properties by combining the R-CFs with cyclic butylene terephthalate (CBT), which is a polymerizable low-viscosity thermoplastic resin. The fabricated composites had a thermal conductivity of 1.35  ±  0.05 (W/mK) and an electrical conductivity of 11.23  ×  10− 6 (S/cm) when the added amount of recycled carbon fibers was 5  wt%.
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