Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis
Management of waste from carbon fibre composites has become a significant societal issue as the application of composite grows across many industries. In this study, carbon fibres (CF) were successfully recovered from cured carbon fibre/epoxy (CF/EP) prepreg under microwave pyrolysis at 450, 550 and...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/8/1231 |
| _version_ | 1797538141001744384 |
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| author | Siqi Hao Lizhe He Jiaqi Liu Yuhao Liu Chris Rudd Xiaoling Liu |
| author_facet | Siqi Hao Lizhe He Jiaqi Liu Yuhao Liu Chris Rudd Xiaoling Liu |
| author_sort | Siqi Hao |
| collection | DOAJ |
| description | Management of waste from carbon fibre composites has become a significant societal issue as the application of composite grows across many industries. In this study, carbon fibres (CF) were successfully recovered from cured carbon fibre/epoxy (CF/EP) prepreg under microwave pyrolysis at 450, 550 and 650 °C followed by oxidation of any residual char. The recovered fibres were investigated for their tensile properties, surface morphologies and the elements/functional groups presented on the surface. The chemical compositions of gaseous and oil pyrolysis products were also analysed. The microwave pyrolysis effectively pyrolyzed the epoxy (EP) resin. Char residue remained on the fibre surface and the amount of char reduced as the pyrolysis temperature increased. Compared to virgin fibres, the recovered fibre suffered from a strength reduction by less than 20%, and this reduction could be mitigated by reducing the pyrolysis temperature. The surface of recovered fibre remained clean and smooth, while the profile of elements and functional groups at the surface were similar to those of virgin fibres. The main gaseous products were CO, H<sub>2</sub>, CO<sub>2</sub> and CH<sub>4,</sub> whilst the liquid product stream included phenolic and aromatic compounds. |
| first_indexed | 2024-03-10T12:26:18Z |
| format | Article |
| id | doaj.art-a80ba74c06e64bb8b53688f28a824dca |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T12:26:18Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-a80ba74c06e64bb8b53688f28a824dca2023-11-21T15:02:33ZengMDPI AGPolymers2073-43602021-04-01138123110.3390/polym13081231Recovery of Carbon Fibre from Waste Prepreg via Microwave PyrolysisSiqi Hao0Lizhe He1Jiaqi Liu2Yuhao Liu3Chris Rudd4Xiaoling Liu5Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, ChinaFaculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, ChinaFaculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, ChinaFaculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, ChinaJames Cook University (JCU), Singapore 387380, SingaporeFaculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, ChinaManagement of waste from carbon fibre composites has become a significant societal issue as the application of composite grows across many industries. In this study, carbon fibres (CF) were successfully recovered from cured carbon fibre/epoxy (CF/EP) prepreg under microwave pyrolysis at 450, 550 and 650 °C followed by oxidation of any residual char. The recovered fibres were investigated for their tensile properties, surface morphologies and the elements/functional groups presented on the surface. The chemical compositions of gaseous and oil pyrolysis products were also analysed. The microwave pyrolysis effectively pyrolyzed the epoxy (EP) resin. Char residue remained on the fibre surface and the amount of char reduced as the pyrolysis temperature increased. Compared to virgin fibres, the recovered fibre suffered from a strength reduction by less than 20%, and this reduction could be mitigated by reducing the pyrolysis temperature. The surface of recovered fibre remained clean and smooth, while the profile of elements and functional groups at the surface were similar to those of virgin fibres. The main gaseous products were CO, H<sub>2</sub>, CO<sub>2</sub> and CH<sub>4,</sub> whilst the liquid product stream included phenolic and aromatic compounds.https://www.mdpi.com/2073-4360/13/8/1231carbon fibrerecyclingmicrowavepyrolysis |
| spellingShingle | Siqi Hao Lizhe He Jiaqi Liu Yuhao Liu Chris Rudd Xiaoling Liu Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis Polymers carbon fibre recycling microwave pyrolysis |
| title | Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis |
| title_full | Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis |
| title_fullStr | Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis |
| title_full_unstemmed | Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis |
| title_short | Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis |
| title_sort | recovery of carbon fibre from waste prepreg via microwave pyrolysis |
| topic | carbon fibre recycling microwave pyrolysis |
| url | https://www.mdpi.com/2073-4360/13/8/1231 |
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