Application of supercritical water for green recycling of epoxy-based carbon fiber reinforced plastic

Authors
Kim, Young NamKim, Young-O.Kim, Seong YunPark, MinYang, BeomjooKim, JaewooJung, Yong Chae
Issue Date
2019-03
Publisher
Pergamon Press Ltd.
Citation
Composites Science and Technology, v.173, pp.66 - 72
Abstract
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 x 10(-6) (S/cm) when the added amount of recycled carbon fibers was 5 wt%.
Keywords
RESIN COMPOSITES; RECOVERY; POLYMERS; WASTES; PHENOL; Supercritical fluid; Carbon fiber reinforced plastic; Recycle; Decomposition; Epoxy
ISSN
0266-3538
URI
https://pubs.kist.re.kr/handle/201004/120274
DOI
10.1016/j.compscitech.2019.01.026
Appears in Collections:
KIST Article > 2019
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