Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet
Dielectric materials with excellent thermally conductive and mechanical properties can enable disruptive performance enhancement in the areas of advanced electronics and high-power devices. However, simultaneously achieving high thermal conductivity and mechanical strength for a single material rema...
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| Format: | Article |
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MDPI AG
2021-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/10/2544 |
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| author | Cenkai Xu Chengmei Wei Qihan Li Zihan Li Zongxi Zhang Junwen Ren |
| author_facet | Cenkai Xu Chengmei Wei Qihan Li Zihan Li Zongxi Zhang Junwen Ren |
| author_sort | Cenkai Xu |
| collection | DOAJ |
| description | Dielectric materials with excellent thermally conductive and mechanical properties can enable disruptive performance enhancement in the areas of advanced electronics and high-power devices. However, simultaneously achieving high thermal conductivity and mechanical strength for a single material remains a challenge. Herein, we report a new strategy for preparing mechanically strong and thermally conductive composite films by combining aramid nanofibers (ANFs) with graphene oxide (GO) and edge-hydroxylated boron nitride nanosheet (BNNS-OH) via a vacuum-assisted filtration and hot-pressing technique. The obtained ANF/GO/BNNS film exhibits an ultrahigh in-plane thermal conductivity of 33.4 Wm<sup>−1</sup> K<sup>−1</sup> at the loading of 10 wt.% GO and 50 wt.% BNNS-OH, which is 2080% higher than that of pure ANF film. The exceptional thermal conductivity results from the biomimetic nacreous “brick-and-mortar” layered structure of the composite film, in which favorable contacting and overlapping between the BNNS-OH and GO is generated, resulting in tightly packed thermal conduction networks. In addition, an outstanding tensile strength of 93.3 MPa is achieved for the composite film, owing to the special biomimetic nacreous structure as well as the strong π−π interactions and extensive hydrogen bonding between the GO and ANFs framework. Meanwhile, the obtained composite film displays excellent thermostability (<i>T</i><sub>d</sub> = 555 °C, <i>T</i><sub>g</sub> > 400 °C) and electrical insulation (4.2 × 10<sup>14</sup> Ω·cm). We believe that these findings shed some light on the design and fabrication of multifunctional materials for thermal management applications. |
| first_indexed | 2024-03-10T06:20:11Z |
| format | Article |
| id | doaj.art-798331c3b48640a19109da1cf9ae0939 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T06:20:11Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-798331c3b48640a19109da1cf9ae09392023-11-22T19:22:57ZengMDPI AGNanomaterials2079-49912021-09-011110254410.3390/nano11102544Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride NanosheetCenkai Xu0Chengmei Wei1Qihan Li2Zihan Li3Zongxi Zhang4Junwen Ren5College of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Aviation Engineering, Civil Aviation Flight University of China, Guanghan 618307, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaElectric Power Research Institute, State Grid Corporation of Sichuan Province, Chengdu 610072, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaDielectric materials with excellent thermally conductive and mechanical properties can enable disruptive performance enhancement in the areas of advanced electronics and high-power devices. However, simultaneously achieving high thermal conductivity and mechanical strength for a single material remains a challenge. Herein, we report a new strategy for preparing mechanically strong and thermally conductive composite films by combining aramid nanofibers (ANFs) with graphene oxide (GO) and edge-hydroxylated boron nitride nanosheet (BNNS-OH) via a vacuum-assisted filtration and hot-pressing technique. The obtained ANF/GO/BNNS film exhibits an ultrahigh in-plane thermal conductivity of 33.4 Wm<sup>−1</sup> K<sup>−1</sup> at the loading of 10 wt.% GO and 50 wt.% BNNS-OH, which is 2080% higher than that of pure ANF film. The exceptional thermal conductivity results from the biomimetic nacreous “brick-and-mortar” layered structure of the composite film, in which favorable contacting and overlapping between the BNNS-OH and GO is generated, resulting in tightly packed thermal conduction networks. In addition, an outstanding tensile strength of 93.3 MPa is achieved for the composite film, owing to the special biomimetic nacreous structure as well as the strong π−π interactions and extensive hydrogen bonding between the GO and ANFs framework. Meanwhile, the obtained composite film displays excellent thermostability (<i>T</i><sub>d</sub> = 555 °C, <i>T</i><sub>g</sub> > 400 °C) and electrical insulation (4.2 × 10<sup>14</sup> Ω·cm). We believe that these findings shed some light on the design and fabrication of multifunctional materials for thermal management applications.https://www.mdpi.com/2079-4991/11/10/2544composite filmthermal conductivityboron nitridehydrogen bondaramid nanofibers |
| spellingShingle | Cenkai Xu Chengmei Wei Qihan Li Zihan Li Zongxi Zhang Junwen Ren Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet Nanomaterials composite film thermal conductivity boron nitride hydrogen bond aramid nanofibers |
| title | Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet |
| title_full | Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet |
| title_fullStr | Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet |
| title_full_unstemmed | Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet |
| title_short | Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet |
| title_sort | robust biomimetic nacreous aramid nanofiber composite films with ultrahigh thermal conductivity by introducing graphene oxide and edge hydroxylated boron nitride nanosheet |
| topic | composite film thermal conductivity boron nitride hydrogen bond aramid nanofibers |
| url | https://www.mdpi.com/2079-4991/11/10/2544 |
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