Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane
Due to the small size of commercial BN crystal and the unique interlayer interaction of BN, the traditional exfoliate method makes it difficult to fabricate BN nanosheets (BNNSs) with high aspect ratio (> 5000). High aspect ratio BNNSs were obtained by sintering ammonium borane and centrifugal se...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2024-04-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000120 |
| _version_ | 1797205656496766976 |
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| author | SONG Quzhi WANG Bing DU Yiang WU Shuang WANG Yingde |
| author_facet | SONG Quzhi WANG Bing DU Yiang WU Shuang WANG Yingde |
| author_sort | SONG Quzhi |
| collection | DOAJ |
| description | Due to the small size of commercial BN crystal and the unique interlayer interaction of BN, the traditional exfoliate method makes it difficult to fabricate BN nanosheets (BNNSs) with high aspect ratio (> 5000). High aspect ratio BNNSs were obtained by sintering ammonium borane and centrifugal separation of the sintering products. The synthesis mechanism and structure of BN nanosheets were characterized by FTIR, TG, TEM and XRD. The results show that the cross-linking and dehydrogenation of ammonium borane begin when the temperature is over 80 ℃. Hydrogen releasing results in the formation of foam structure during the cross link process of ammonium borune, and finally the inorganic process was completed at 1000 ℃ to obtain the BN foam containing BNNSs. The as-prepared BNNSs are hexagonal crystal structure, with a thickness of about 1.5 nm and an average width of 30 μm. The width-thickness ratio reaches 20000. The high aspect ratio BNNSs were introduced to polyvinyl alcohol (PVA) to prepare the BNNS/PVA composite film. The composite film shows significant improvement in thermal conductivity and mechanical properties, fully explains the application advantages of high aspect ratio BNNSs in the field of BN based composites. |
| first_indexed | 2024-04-24T08:54:35Z |
| format | Article |
| id | doaj.art-a1aab549d52c4cd981502dfaf52a096c |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-04-24T08:54:35Z |
| publishDate | 2024-04-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-a1aab549d52c4cd981502dfaf52a096c2024-04-16T08:29:20ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812024-04-0152417618210.11868/j.issn.1001-4381.2023.00012020240418Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium boraneSONG Quzhi0WANG Bing1DU Yiang2WU Shuang3WANG Yingde4Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410037, ChinaScience and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410037, ChinaScience and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410037, ChinaScience and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410037, ChinaScience and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410037, ChinaDue to the small size of commercial BN crystal and the unique interlayer interaction of BN, the traditional exfoliate method makes it difficult to fabricate BN nanosheets (BNNSs) with high aspect ratio (> 5000). High aspect ratio BNNSs were obtained by sintering ammonium borane and centrifugal separation of the sintering products. The synthesis mechanism and structure of BN nanosheets were characterized by FTIR, TG, TEM and XRD. The results show that the cross-linking and dehydrogenation of ammonium borane begin when the temperature is over 80 ℃. Hydrogen releasing results in the formation of foam structure during the cross link process of ammonium borune, and finally the inorganic process was completed at 1000 ℃ to obtain the BN foam containing BNNSs. The as-prepared BNNSs are hexagonal crystal structure, with a thickness of about 1.5 nm and an average width of 30 μm. The width-thickness ratio reaches 20000. The high aspect ratio BNNSs were introduced to polyvinyl alcohol (PVA) to prepare the BNNS/PVA composite film. The composite film shows significant improvement in thermal conductivity and mechanical properties, fully explains the application advantages of high aspect ratio BNNSs in the field of BN based composites.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000120ammonium boraneboron nitride nanosheethigh aspect ratiothermal conductivity |
| spellingShingle | SONG Quzhi WANG Bing DU Yiang WU Shuang WANG Yingde Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane Cailiao gongcheng ammonium borane boron nitride nanosheet high aspect ratio thermal conductivity |
| title | Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane |
| title_full | Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane |
| title_fullStr | Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane |
| title_full_unstemmed | Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane |
| title_short | Fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane |
| title_sort | fabrication and formation mechanism of high aspect ratio boron nitride nanosheets prepared by ammonium borane |
| topic | ammonium borane boron nitride nanosheet high aspect ratio thermal conductivity |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000120 |
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