A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding
Highlights The cationic waterborne polyurethanes microspheres with Diels-Alder bonds were synthesized for the first time. The electrostatic attraction not only endows the composite with segregated structure to gain high electromagnetic-interference shielding effectiveness, but also greatly enhances...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-08-01
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| Series: | Nano-Micro Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40820-021-00693-5 |
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| author | Ting Wang Wei-Wei Kong Wan-Cheng Yu Jie-Feng Gao Kun Dai Ding-Xiang Yan Zhong-Ming Li |
| author_facet | Ting Wang Wei-Wei Kong Wan-Cheng Yu Jie-Feng Gao Kun Dai Ding-Xiang Yan Zhong-Ming Li |
| author_sort | Ting Wang |
| collection | DOAJ |
| description | Highlights The cationic waterborne polyurethanes microspheres with Diels-Alder bonds were synthesized for the first time. The electrostatic attraction not only endows the composite with segregated structure to gain high electromagnetic-interference shielding effectiveness, but also greatly enhances mechanical properties. Efficient healing property was realized under heating environment. Abstract It is still challenging for conductive polymer composite-based electromagnetic interference (EMI) shielding materials to achieve long-term stability while maintaining high EMI shielding effectiveness (EMI SE), especially undergoing external mechanical stimuli, such as scratches or large deformations. Herein, an electrostatic assembly strategy is adopted to design a healable and segregated carbon nanotube (CNT)/graphene oxide (GO)/polyurethane (PU) composite with excellent and reliable EMI SE, even bearing complex mechanical condition. The negatively charged CNT/GO hybrid is facilely adsorbed on the surface of positively charged PU microsphere to motivate formation of segregated conductive networks in CNT/GO/PU composite, establishing a high EMI SE of 52.7 dB at only 10 wt% CNT/GO loading. The Diels–Alder bonds in PU microsphere endow the CNT/GO/PU composite suffering three cutting/healing cycles with EMI SE retention up to 90%. Additionally, the electrostatic attraction between CNT/GO hybrid and PU microsphere helps to strong interfacial bonding in the composite, resulting in high tensile strength of 43.1 MPa and elongation at break of 626%. The healing efficiency of elongation at break achieves 95% when the composite endured three cutting/healing cycles. This work demonstrates a novel strategy for developing segregated EMI shielding composite with healable features and excellent mechanical performance and shows great potential in the durable and high precision electrical instruments. |
| first_indexed | 2024-12-22T08:32:44Z |
| format | Article |
| id | doaj.art-1d113866de694451a134d74a284a75bd |
| institution | Directory Open Access Journal |
| issn | 2311-6706 2150-5551 |
| language | English |
| last_indexed | 2024-12-22T08:32:44Z |
| publishDate | 2021-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano-Micro Letters |
| spelling | doaj.art-1d113866de694451a134d74a284a75bd2022-12-21T18:32:26ZengSpringerOpenNano-Micro Letters2311-67062150-55512021-08-0113111410.1007/s40820-021-00693-5A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference ShieldingTing Wang0Wei-Wei Kong1Wan-Cheng Yu2Jie-Feng Gao3Kun Dai4Ding-Xiang Yan5Zhong-Ming Li6College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan UniversityCollege of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan UniversityCollege of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan UniversityThe College of Chemistry and Chemical Engineering, Yangzhou UniversitySchool of Materials Science and Engineering, Zhengzhou UniversityCollege of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan UniversityCollege of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan UniversityHighlights The cationic waterborne polyurethanes microspheres with Diels-Alder bonds were synthesized for the first time. The electrostatic attraction not only endows the composite with segregated structure to gain high electromagnetic-interference shielding effectiveness, but also greatly enhances mechanical properties. Efficient healing property was realized under heating environment. Abstract It is still challenging for conductive polymer composite-based electromagnetic interference (EMI) shielding materials to achieve long-term stability while maintaining high EMI shielding effectiveness (EMI SE), especially undergoing external mechanical stimuli, such as scratches or large deformations. Herein, an electrostatic assembly strategy is adopted to design a healable and segregated carbon nanotube (CNT)/graphene oxide (GO)/polyurethane (PU) composite with excellent and reliable EMI SE, even bearing complex mechanical condition. The negatively charged CNT/GO hybrid is facilely adsorbed on the surface of positively charged PU microsphere to motivate formation of segregated conductive networks in CNT/GO/PU composite, establishing a high EMI SE of 52.7 dB at only 10 wt% CNT/GO loading. The Diels–Alder bonds in PU microsphere endow the CNT/GO/PU composite suffering three cutting/healing cycles with EMI SE retention up to 90%. Additionally, the electrostatic attraction between CNT/GO hybrid and PU microsphere helps to strong interfacial bonding in the composite, resulting in high tensile strength of 43.1 MPa and elongation at break of 626%. The healing efficiency of elongation at break achieves 95% when the composite endured three cutting/healing cycles. This work demonstrates a novel strategy for developing segregated EMI shielding composite with healable features and excellent mechanical performance and shows great potential in the durable and high precision electrical instruments.https://doi.org/10.1007/s40820-021-00693-5Electrostatic attractionHealableEMI shieldingDiels–Alder reaction |
| spellingShingle | Ting Wang Wei-Wei Kong Wan-Cheng Yu Jie-Feng Gao Kun Dai Ding-Xiang Yan Zhong-Ming Li A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding Nano-Micro Letters Electrostatic attraction Healable EMI shielding Diels–Alder reaction |
| title | A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding |
| title_full | A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding |
| title_fullStr | A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding |
| title_full_unstemmed | A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding |
| title_short | A Healable and Mechanically Enhanced Composite with Segregated Conductive Network Structure for High-Efficient Electromagnetic Interference Shielding |
| title_sort | healable and mechanically enhanced composite with segregated conductive network structure for high efficient electromagnetic interference shielding |
| topic | Electrostatic attraction Healable EMI shielding Diels–Alder reaction |
| url | https://doi.org/10.1007/s40820-021-00693-5 |
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