| Title |
Synthesis of Photoresponsive Fast Self-healing Polyolefin Composites by Nickel-Catalyzed Copolymerization of Ethylene and Lignin Cluster Monomers |
| ID_Doc |
8215 |
| Authors |
Chen, JW; Chen, A; Zou, C; Chen, CL |
| Title |
Synthesis of Photoresponsive Fast Self-healing Polyolefin Composites by Nickel-Catalyzed Copolymerization of Ethylene and Lignin Cluster Monomers |
| Year |
2024 |
| Published |
Angewandte Chemie-International Edition, 63.0, 32 |
| Abstract |
Polymers may suffer from sudden mechanical damages during long-term use under various harsh operating environments. Rapid and real-time self-healing will extend their service life, which is particularly attractive in the context of circular economy. In this work, a lignin cluster polymerization strategy (LCPS) was designed to prepare a series of lignin functionalized polyolefin composites with excellent mechanical properties through nickel catalyzed copolymerization of ethylene and lignin cluster monomers. These composites can achieve rapid self-healing within 30 seconds under a variety of extreme usage environments (underwater, seawater, extremely low temperatures as low as -60 degrees C, organic solvents, acid/alkali solvents, etc.), which is of great significance for real-time self-healing of sudden mechanical damage. More importantly, the dynamic cross-linking network within these composites enable great re-processability and amazing sealing performances. The lignin cluster polymerization strategy (LCPS) prevents the poisoning of the alpha-diimine nickel catalyst by polarmonomers or polar groups of lignin, and achieves efficient synthesis of polyolefin composites. This strategy enabled even dispersion of lignin, enhancing photothermal conversion and interfacial heat transfer between lignin and polymers, thereby accelerating self-healing speed. image |
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