Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid
Preserving the integrity of carbon fibers when recycling carbon-fiber-reinforced plastics (CFRPs) has been unfeasible due to the harsh reaction conditions required to remove epoxy resin matrixes, which adversely affect the properties of carbon fibers. We establish a practicable and environmentally f...
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doaj-25bd2c60a1974a85bf4dcadd1cf5946a2020-11-25T03:52:31ZengMDPI AGPolymers2073-43602020-08-01121866186610.3390/polym12091866Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic AcidChun Pei0Peiheng Guo1Ji-Hua Zhu2Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Province Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, ChinaGuangdong Province Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, ChinaPreserving the integrity of carbon fibers when recycling carbon-fiber-reinforced plastics (CFRPs) has been unfeasible due to the harsh reaction conditions required to remove epoxy resin matrixes, which adversely affect the properties of carbon fibers. We establish a practicable and environmentally friendly reclamation strategy for carbon fibers. Carbon fibers are recycled from waste CFRPs by an electrochemical catalytic reaction with the assistance of phosphotungstic acid (PA), which promotes the depolymerization of diglycidyl ether of bisphenol A/ethylenediamine (DGEBA/EDA) epoxy resin. The removal rate, mechanical strength, and microstructure of the recycled carbon fibers are analyzed to explore the mechanism of the electrochemical treatment. The influence of three factors—current density, PA concentration, and reaction time—are studied via an orthogonal method. Range analysis and variance analysis are conducted to investigate the significance of the factors. The optimal conditions are determined accordingly. The underlying CFRP degradation mechanism is also investigated.https://www.mdpi.com/2073-4360/12/9/1866electrochemical catalysisrecycled carbon fibersorthogonal studydegradation mechanism |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chun Pei Peiheng Guo Ji-Hua Zhu |
spellingShingle |
Chun Pei Peiheng Guo Ji-Hua Zhu Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid Polymers electrochemical catalysis recycled carbon fibers orthogonal study degradation mechanism |
author_facet |
Chun Pei Peiheng Guo Ji-Hua Zhu |
author_sort |
Chun Pei |
title |
Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid |
title_short |
Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid |
title_full |
Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid |
title_fullStr |
Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid |
title_full_unstemmed |
Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid |
title_sort |
orthogonal experimental analysis and mechanism study on electrochemical catalytic treatment of carbon fiber-reinforced plastics assisted by phosphotungstic acid |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-08-01 |
description |
Preserving the integrity of carbon fibers when recycling carbon-fiber-reinforced plastics (CFRPs) has been unfeasible due to the harsh reaction conditions required to remove epoxy resin matrixes, which adversely affect the properties of carbon fibers. We establish a practicable and environmentally friendly reclamation strategy for carbon fibers. Carbon fibers are recycled from waste CFRPs by an electrochemical catalytic reaction with the assistance of phosphotungstic acid (PA), which promotes the depolymerization of diglycidyl ether of bisphenol A/ethylenediamine (DGEBA/EDA) epoxy resin. The removal rate, mechanical strength, and microstructure of the recycled carbon fibers are analyzed to explore the mechanism of the electrochemical treatment. The influence of three factors—current density, PA concentration, and reaction time—are studied via an orthogonal method. Range analysis and variance analysis are conducted to investigate the significance of the factors. The optimal conditions are determined accordingly. The underlying CFRP degradation mechanism is also investigated. |
topic |
electrochemical catalysis recycled carbon fibers orthogonal study degradation mechanism |
url |
https://www.mdpi.com/2073-4360/12/9/1866 |
work_keys_str_mv |
AT chunpei orthogonalexperimentalanalysisandmechanismstudyonelectrochemicalcatalytictreatmentofcarbonfiberreinforcedplasticsassistedbyphosphotungsticacid AT peihengguo orthogonalexperimentalanalysisandmechanismstudyonelectrochemicalcatalytictreatmentofcarbonfiberreinforcedplasticsassistedbyphosphotungsticacid AT jihuazhu orthogonalexperimentalanalysisandmechanismstudyonelectrochemicalcatalytictreatmentofcarbonfiberreinforcedplasticsassistedbyphosphotungsticacid |
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1724482512612229120 |