Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin Composites
With the increasing threats arising from the electromagnetic environment, polymeric composites which could exhibit nonlinear conductive characteristics are highly required in the protection of electronic devices against overvoltage. In this research, ZnO nanoparticles are coated onto graphene nanopl...
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| Format: | Article |
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MDPI AG
2020-07-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/8/1634 |
| _version_ | 1797561559381180416 |
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| author | Yang Yuan Zhaoming Qu Qingguo Wang Xiaoning Sun |
| author_facet | Yang Yuan Zhaoming Qu Qingguo Wang Xiaoning Sun |
| author_sort | Yang Yuan |
| collection | DOAJ |
| description | With the increasing threats arising from the electromagnetic environment, polymeric composites which could exhibit nonlinear conductive characteristics are highly required in the protection of electronic devices against overvoltage. In this research, ZnO nanoparticles are coated onto graphene nanoplatelets (GNPs)-carbon nanotubes (CNTs) hybrid, and then it is embedded in epoxy resin (ER) matrix via solution blending. Based on the characterization results, CNTs are well dispersed across the GNPs which prevent the restacking of GNPs and CNTs. At the same time, ZnO nanoparticles are well-bonded to the surfaces of GNPs-CNTs hybrid. During repeated conductive characteristic measurements, GNPs-CNTs-ZnO/ER composite is able to demonstrate distinctly reversible nonlinear conductive behavior, with high nonlinear coefficients. Especially, the filler content in GNPs-CNTs-ZnO/ER composite is only 12.5% of that in GNPs-ZnO/ER composite reported in our previous work. Moreover, it is shown that the nonlinear coefficients and switching threshold voltage can be modified by controlling the weight ratios of GNPs, CNTs, and ZnO. Finally, the samples with 1:1 weight ratio of GO to MWCNTs (A-6.67 and A-10) exhibit the best reversible nonlinear conductive behavior. |
| first_indexed | 2024-03-10T18:16:38Z |
| format | Article |
| id | doaj.art-1ae7bdd8fd184f4ea244e0d36227581b |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T18:16:38Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-1ae7bdd8fd184f4ea244e0d36227581b2023-11-20T07:37:47ZengMDPI AGPolymers2073-43602020-07-01128163410.3390/polym12081634Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin CompositesYang Yuan0Zhaoming Qu1Qingguo Wang2Xiaoning Sun3National Key Laboratory on Electromagnetic Environment Effects, Army Engineering University, Shijiazhuang 050003, ChinaNational Key Laboratory on Electromagnetic Environment Effects, Army Engineering University, Shijiazhuang 050003, ChinaNational Key Laboratory on Electromagnetic Environment Effects, Army Engineering University, Shijiazhuang 050003, ChinaNational Key Laboratory on Electromagnetic Environment Effects, Army Engineering University, Shijiazhuang 050003, ChinaWith the increasing threats arising from the electromagnetic environment, polymeric composites which could exhibit nonlinear conductive characteristics are highly required in the protection of electronic devices against overvoltage. In this research, ZnO nanoparticles are coated onto graphene nanoplatelets (GNPs)-carbon nanotubes (CNTs) hybrid, and then it is embedded in epoxy resin (ER) matrix via solution blending. Based on the characterization results, CNTs are well dispersed across the GNPs which prevent the restacking of GNPs and CNTs. At the same time, ZnO nanoparticles are well-bonded to the surfaces of GNPs-CNTs hybrid. During repeated conductive characteristic measurements, GNPs-CNTs-ZnO/ER composite is able to demonstrate distinctly reversible nonlinear conductive behavior, with high nonlinear coefficients. Especially, the filler content in GNPs-CNTs-ZnO/ER composite is only 12.5% of that in GNPs-ZnO/ER composite reported in our previous work. Moreover, it is shown that the nonlinear coefficients and switching threshold voltage can be modified by controlling the weight ratios of GNPs, CNTs, and ZnO. Finally, the samples with 1:1 weight ratio of GO to MWCNTs (A-6.67 and A-10) exhibit the best reversible nonlinear conductive behavior.https://www.mdpi.com/2073-4360/12/8/1634nonlinear conductive characteristicspolymeric compositesswitching threshold voltagereversibilityGNPs-CNTs-ZnO hybrid |
| spellingShingle | Yang Yuan Zhaoming Qu Qingguo Wang Xiaoning Sun Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin Composites Polymers nonlinear conductive characteristics polymeric composites switching threshold voltage reversibility GNPs-CNTs-ZnO hybrid |
| title | Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin Composites |
| title_full | Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin Composites |
| title_fullStr | Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin Composites |
| title_full_unstemmed | Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin Composites |
| title_short | Nonlinear Conductive Characteristics of ZnO-Coated Graphene Nanoplatelets-Carbon Nanotubes/Epoxy Resin Composites |
| title_sort | nonlinear conductive characteristics of zno coated graphene nanoplatelets carbon nanotubes epoxy resin composites |
| topic | nonlinear conductive characteristics polymeric composites switching threshold voltage reversibility GNPs-CNTs-ZnO hybrid |
| url | https://www.mdpi.com/2073-4360/12/8/1634 |
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