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Published on: December 16, 2022
Covalent Adaptable Network Enables Sustainable Polyethylene for Next-Generation Cable Insulation
Wenye Zhang1, Wenjie Huang1, Jiangqiong Wang1
1School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China.
This study introduces new self-healing and recyclable cable insulation materials. These advanced covalent adaptable networks (CANs) outperform traditional cross-linked polyethylene (XLPE) in toughness and electrical insulation.
Area of Science:
- Materials Science
- Polymer Chemistry
- Electrical Engineering
Background:
- Cross-linked polyethylene (XLPE) is vital for high voltage power transmission but suffers from degradation under stress.
- XLPE's irreversible nature hinders self-healing and recycling, leading to equipment failure and waste.
Purpose of the Study:
- To develop sustainable and durable insulating materials for power transmission.
- To overcome the limitations of XLPE regarding self-healing and recyclability.
Main Methods:
- Synthesized functionalized polyethylene using Cu-catalyzed amination.
- Prepared covalent adaptable networks (CANs) utilizing dynamic covalent chemistry.
- Investigated performance recovery after mechanical and electrical damage.
Main Results:
- CANs demonstrated near 100% performance recovery after damage due to dual dynamic covalent bond exchange.
- Achieved superior toughness (102.0 MJ m⁻³) and electrical insulation (7% field distortion at 70°C) compared to XLPE.
- The CANs combine permanent and dynamic cross-linking for enhanced properties.
Conclusions:
- Developed innovative CANs with excellent self-healing and recycling capabilities.
- Promoted environmental friendliness and extended the service life of cable insulation.
- Paved the way for a new generation of sustainable cable insulation materials.
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