Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management Application
The development of highly thermally conductive composites with excellent electrical insulation has attracted extensive attention, which is of great significance to solve the increasingly severe heat concentration issue of electronic equipment. Herein, we report a new strategy to prepare boron nitrid...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/13/2028 |
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| author | Li-Hua Zhao Yun Liao Li-Chuan Jia Zhong Wang Xiao-Long Huang Wen-Jun Ning Zong-Xi Zhang Jun-Wen Ren |
| author_facet | Li-Hua Zhao Yun Liao Li-Chuan Jia Zhong Wang Xiao-Long Huang Wen-Jun Ning Zong-Xi Zhang Jun-Wen Ren |
| author_sort | Li-Hua Zhao |
| collection | DOAJ |
| description | The development of highly thermally conductive composites with excellent electrical insulation has attracted extensive attention, which is of great significance to solve the increasingly severe heat concentration issue of electronic equipment. Herein, we report a new strategy to prepare boron nitride nanosheets (BNNSs) via an ion-assisted liquid-phase exfoliation method. Then, silver nanoparticle (AgNP) modified BNNS (BNNS@Ag) was obtained by in situ reduction properties. The exfoliation yield of BNNS was approximately 50% via the ion-assisted liquid-phase exfoliation method. Subsequently, aramid nanofiber (ANF)/BNNS@Ag composites were prepared by vacuum filtration. Owing to the “brick-and-mortar” structure formed inside the composite and the adhesion of AgNP, the interfacial thermal resistance was effectively reduced. Therefore, the in-plane thermal conductivity of ANF/BNNS@Ag composites was as high as 11.51 W m<sup>−1</sup> K<sup>−1</sup>, which was 233.27% higher than that of pure ANF (3.45 W m<sup>−1</sup> K<sup>−1</sup>). The addition of BNNS@Ag maintained tensile properties (tensile strength of 129.14 MPa). Moreover, the ANF/BNNS@Ag films also had good dielectric properties and the dielectric constant was below 2.5 (10<sup>3</sup> Hz). Hence, the ANF/BNNS@Ag composite shows excellent thermal management performance, and the electrical insulation and mechanical properties of the matrix are retained, indicating its potential application prospects in high pressure and high temperature application environments. |
| first_indexed | 2024-03-10T10:11:59Z |
| format | Article |
| id | doaj.art-b6c2ce87c3124747998090d0827e465c |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T10:11:59Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-b6c2ce87c3124747998090d0827e465c2023-11-22T01:06:25ZengMDPI AGPolymers2073-43602021-06-011313202810.3390/polym13132028Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management ApplicationLi-Hua Zhao0Yun Liao1Li-Chuan Jia2Zhong Wang3Xiao-Long Huang4Wen-Jun Ning5Zong-Xi Zhang6Jun-Wen Ren7College of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaState Grid Sichuan Electric Power Research Institute, State Grid of China, Chengdu 610041, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaThe development of highly thermally conductive composites with excellent electrical insulation has attracted extensive attention, which is of great significance to solve the increasingly severe heat concentration issue of electronic equipment. Herein, we report a new strategy to prepare boron nitride nanosheets (BNNSs) via an ion-assisted liquid-phase exfoliation method. Then, silver nanoparticle (AgNP) modified BNNS (BNNS@Ag) was obtained by in situ reduction properties. The exfoliation yield of BNNS was approximately 50% via the ion-assisted liquid-phase exfoliation method. Subsequently, aramid nanofiber (ANF)/BNNS@Ag composites were prepared by vacuum filtration. Owing to the “brick-and-mortar” structure formed inside the composite and the adhesion of AgNP, the interfacial thermal resistance was effectively reduced. Therefore, the in-plane thermal conductivity of ANF/BNNS@Ag composites was as high as 11.51 W m<sup>−1</sup> K<sup>−1</sup>, which was 233.27% higher than that of pure ANF (3.45 W m<sup>−1</sup> K<sup>−1</sup>). The addition of BNNS@Ag maintained tensile properties (tensile strength of 129.14 MPa). Moreover, the ANF/BNNS@Ag films also had good dielectric properties and the dielectric constant was below 2.5 (10<sup>3</sup> Hz). Hence, the ANF/BNNS@Ag composite shows excellent thermal management performance, and the electrical insulation and mechanical properties of the matrix are retained, indicating its potential application prospects in high pressure and high temperature application environments.https://www.mdpi.com/2073-4360/13/13/2028high thermal conductivityboron nitride nanosheetsin situ reductioncompositeselectrical insulation |
| spellingShingle | Li-Hua Zhao Yun Liao Li-Chuan Jia Zhong Wang Xiao-Long Huang Wen-Jun Ning Zong-Xi Zhang Jun-Wen Ren Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management Application Polymers high thermal conductivity boron nitride nanosheets in situ reduction composites electrical insulation |
| title | Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management Application |
| title_full | Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management Application |
| title_fullStr | Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management Application |
| title_full_unstemmed | Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management Application |
| title_short | Ultra-Robust Thermoconductive Films Made from Aramid Nanofiber and Boron Nitride Nanosheet for Thermal Management Application |
| title_sort | ultra robust thermoconductive films made from aramid nanofiber and boron nitride nanosheet for thermal management application |
| topic | high thermal conductivity boron nitride nanosheets in situ reduction composites electrical insulation |
| url | https://www.mdpi.com/2073-4360/13/13/2028 |
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