Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea Structure
Abstract Plastic recycling is a critical step toward improving waste management and achieving economic recycling. Here, a thermoset crosslinked by guanythiourea structure (GTUH network) is reported, that addresses the recycling issue of thermosets by serial hybridization of thiourea and guanidine ur...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202410773 |
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| author | Zhen Yu Yanlin Liu Xiangyu Zhou Yajin Fang Zhaobin Tang Jin Zhu Junping Zhang |
| author_facet | Zhen Yu Yanlin Liu Xiangyu Zhou Yajin Fang Zhaobin Tang Jin Zhu Junping Zhang |
| author_sort | Zhen Yu |
| collection | DOAJ |
| description | Abstract Plastic recycling is a critical step toward improving waste management and achieving economic recycling. Here, a thermoset crosslinked by guanythiourea structure (GTUH network) is reported, that addresses the recycling issue of thermosets by serial hybridization of thiourea and guanidine urea. The dual dissociative dynamic exchange reaction of guanamine urea and thiourea, combined with non‐covalent hydrogen bonding interactions, endows the network with rapid relaxation ability. GTUH networks, in particular, can be recycled through continuous extrusion processing due to multiple reversible mechanisms, as opposed to hot pressing alone. Even if reprocessed by hot pressing, only 5 min at 140 °C and 10 MPa are required. The oxidation enhancement mechanism of thiourea contributes to maintaining or even improving the mechanical properties of the recycled network. Moreover, the dynamic reactions of guanythiourea structure allow for closed‐loop chemical recycling of the network. Research into recyclable carbon fiber‐reinforced composites indicates promising potential applications for this material in the circular economy and resources. |
| format | Article |
| id | doaj-art-ca5b30e7392b4512b59ee46ab3ad9e7b |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-ca5b30e7392b4512b59ee46ab3ad9e7b2024-12-27T13:00:47ZengWileyAdvanced Science2198-38442024-12-011148n/an/a10.1002/advs.202410773Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea StructureZhen Yu0Yanlin Liu1Xiangyu Zhou2Yajin Fang3Zhaobin Tang4Jin Zhu5Junping Zhang6Research Center of Resource Chemistry and Energy Materials, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 P. R. ChinaNingbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. ChinaNingbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. ChinaNingbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. ChinaNingbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. ChinaNingbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. ChinaResearch Center of Resource Chemistry and Energy Materials, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 P. R. ChinaAbstract Plastic recycling is a critical step toward improving waste management and achieving economic recycling. Here, a thermoset crosslinked by guanythiourea structure (GTUH network) is reported, that addresses the recycling issue of thermosets by serial hybridization of thiourea and guanidine urea. The dual dissociative dynamic exchange reaction of guanamine urea and thiourea, combined with non‐covalent hydrogen bonding interactions, endows the network with rapid relaxation ability. GTUH networks, in particular, can be recycled through continuous extrusion processing due to multiple reversible mechanisms, as opposed to hot pressing alone. Even if reprocessed by hot pressing, only 5 min at 140 °C and 10 MPa are required. The oxidation enhancement mechanism of thiourea contributes to maintaining or even improving the mechanical properties of the recycled network. Moreover, the dynamic reactions of guanythiourea structure allow for closed‐loop chemical recycling of the network. Research into recyclable carbon fiber‐reinforced composites indicates promising potential applications for this material in the circular economy and resources.https://doi.org/10.1002/advs.202410773compositesclosed‐loop recyclabledynamic covalent polymerextrusionguanylthiourea |
| spellingShingle | Zhen Yu Yanlin Liu Xiangyu Zhou Yajin Fang Zhaobin Tang Jin Zhu Junping Zhang Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea Structure Advanced Science composites closed‐loop recyclable dynamic covalent polymer extrusion guanylthiourea |
| title | Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea Structure |
| title_full | Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea Structure |
| title_fullStr | Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea Structure |
| title_full_unstemmed | Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea Structure |
| title_short | Closed‐Loop Recyclable and Extrusion Reprocessable Thermosets Enabled by Guanylthiourea Structure |
| title_sort | closed loop recyclable and extrusion reprocessable thermosets enabled by guanylthiourea structure |
| topic | composites closed‐loop recyclable dynamic covalent polymer extrusion guanylthiourea |
| url | https://doi.org/10.1002/advs.202410773 |
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