Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites
High-performance epoxy (EP) composites with excellent thermal conductivity and dielectric properties have attracted increasing attention for effective thermal management. In this work, three-dimensional (3D) structural functional fillers were prepared by an electrostatic self-assembly approach. The...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Journal of Materiomics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847820301969 |
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| author | Dong-Li Zhang Sheng-Nan Liu Hui-Wu Cai Qi-Kun Feng Shao-Long Zhong Jun-Wei Zha Zhi-Min Dang |
| author_facet | Dong-Li Zhang Sheng-Nan Liu Hui-Wu Cai Qi-Kun Feng Shao-Long Zhong Jun-Wei Zha Zhi-Min Dang |
| author_sort | Dong-Li Zhang |
| collection | DOAJ |
| description | High-performance epoxy (EP) composites with excellent thermal conductivity and dielectric properties have attracted increasing attention for effective thermal management. In this work, three-dimensional (3D) structural functional fillers were prepared by an electrostatic self-assembly approach. The negatively charged carbon nanotubes (nCNTs) prepared by carboxylation on the surface of CNTs were attached to the positively charged boron nitride (pBN) to form the 3D pBN@nCNTs functional fillers. The morphological characterizations of the formed 3D pBN@nCNTs fillers and epoxy composites were established, illustrating that nCNTs were linearly overlapped between the BN sheets, thus forming a 3D heat conduction network in the epoxy matrix. The synergistic effect of pBN with nCNTs on the enhancement of thermal conductivity and dielectric properties of composites was systematically studied. The experimental results demonstrated that the thermal conductivity of pBN@nCNTs/EP composites could reach 1.986 W m−1K−1 with the loading of 50 wt% fillers at 10:1 mass ratio of pBN:nCNTs, which is 464% and 124% higher than that of pure EP and BN/EP, respectively. Simultaneously, the dielectric permittivity was successfully increased to 15.14. Moreover, the thermal stability of the composites was synchronously enhanced. This study provides a facile path to fabricate thermosetting polymer composites with high thermal conductivity and dielectric properties. |
| first_indexed | 2024-03-12T07:10:40Z |
| format | Article |
| id | doaj.art-e9e0566f74184517895f8cf025b9394f |
| institution | Directory Open Access Journal |
| issn | 2352-8478 |
| language | English |
| last_indexed | 2024-03-12T07:10:40Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materiomics |
| spelling | doaj.art-e9e0566f74184517895f8cf025b9394f2023-09-02T23:11:12ZengElsevierJournal of Materiomics2352-84782020-12-0164751759Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin compositesDong-Li Zhang0Sheng-Nan Liu1Hui-Wu Cai2Qi-Kun Feng3Shao-Long Zhong4Jun-Wei Zha5Zhi-Min Dang6State key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, ChinaSchool of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an, 710054, ChinaSchool of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an, 710054, China; Corresponding author.State key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, ChinaState key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, ChinaSchool of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaState key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China; Center on Frontier Technologies for Advanced Power Transmission and Distribution Equipment, School of Electrical Engineering, Zhengzhou University, Henan, 450001, China; Corresponding author. State key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China.High-performance epoxy (EP) composites with excellent thermal conductivity and dielectric properties have attracted increasing attention for effective thermal management. In this work, three-dimensional (3D) structural functional fillers were prepared by an electrostatic self-assembly approach. The negatively charged carbon nanotubes (nCNTs) prepared by carboxylation on the surface of CNTs were attached to the positively charged boron nitride (pBN) to form the 3D pBN@nCNTs functional fillers. The morphological characterizations of the formed 3D pBN@nCNTs fillers and epoxy composites were established, illustrating that nCNTs were linearly overlapped between the BN sheets, thus forming a 3D heat conduction network in the epoxy matrix. The synergistic effect of pBN with nCNTs on the enhancement of thermal conductivity and dielectric properties of composites was systematically studied. The experimental results demonstrated that the thermal conductivity of pBN@nCNTs/EP composites could reach 1.986 W m−1K−1 with the loading of 50 wt% fillers at 10:1 mass ratio of pBN:nCNTs, which is 464% and 124% higher than that of pure EP and BN/EP, respectively. Simultaneously, the dielectric permittivity was successfully increased to 15.14. Moreover, the thermal stability of the composites was synchronously enhanced. This study provides a facile path to fabricate thermosetting polymer composites with high thermal conductivity and dielectric properties.http://www.sciencedirect.com/science/article/pii/S2352847820301969Thermal conductivityDielectric permittivityCompositesElectrostatic self-assembly |
| spellingShingle | Dong-Li Zhang Sheng-Nan Liu Hui-Wu Cai Qi-Kun Feng Shao-Long Zhong Jun-Wei Zha Zhi-Min Dang Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites Journal of Materiomics Thermal conductivity Dielectric permittivity Composites Electrostatic self-assembly |
| title | Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites |
| title_full | Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites |
| title_fullStr | Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites |
| title_full_unstemmed | Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites |
| title_short | Enhanced thermal conductivity and dielectric properties in electrostatic self-assembly 3D pBN@nCNTs fillers loaded in epoxy resin composites |
| title_sort | enhanced thermal conductivity and dielectric properties in electrostatic self assembly 3d pbn ncnts fillers loaded in epoxy resin composites |
| topic | Thermal conductivity Dielectric permittivity Composites Electrostatic self-assembly |
| url | http://www.sciencedirect.com/science/article/pii/S2352847820301969 |
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