Preparation and Properties of RDX@FOX-7 Composites by Microfluidic Technology
1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) is a type of high energy explosive, its application in weapon systems is limited by its high mechanical sensitivity. At the same time, 1,1-diamino-2,2-dinitroethylene (FOX-7) is a famous insensitive explosive. The preparation of RDX@FOX-7 composites can m...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/2/167 |
| _version_ | 1797621602918072320 |
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| author | Jin Yu Hanyu Jiang Siyu Xu Heng Li Yiping Wang Ergang Yao Qing Pei Meng Li Yang Zhang Fengqi Zhao |
| author_facet | Jin Yu Hanyu Jiang Siyu Xu Heng Li Yiping Wang Ergang Yao Qing Pei Meng Li Yang Zhang Fengqi Zhao |
| author_sort | Jin Yu |
| collection | DOAJ |
| description | 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) is a type of high energy explosive, its application in weapon systems is limited by its high mechanical sensitivity. At the same time, 1,1-diamino-2,2-dinitroethylene (FOX-7) is a famous insensitive explosive. The preparation of RDX@FOX-7 composites can meet the requirements, high energy and low sensitivity, of the weapon systems. It is difficult for the reactor to achieve uniform quality of composite material, which affects its application performance. Based on the principle of solvent-anti-solvent, the recrystallization process was precisely controlled by microfluidic technology. The RDX@FOX-7 composites with different mass ratios were prepared. At the mass ratio of 10%, the RDX@FOX-7 composites are ellipsoid of about 15 μm with uniform distribution and quality. The advantages of microscale fabrication of composite materials were verified. The results of structure characterization showed that there is no new bond formation in RDX@FOX-7, but the distribution of two components on the surface of the composite was uniform. Based on the structure characterization, we established the structure model of RDX@RDX-7 and speculated the formation process of the composites in microscale. With the increase of FOX-7 mass ratios, the melting temperature of RDX was advanced, the thermal decomposition peak of RDX changed to double peaks, and the activation energy of RDX@FOX-7 composite decreased. These changes were more pronounced between 3 and 10% but not between 10 and 30%. The ignition delay time of RDX@FOX-7 was shorter than that of RDX and FOX-7. RDX@FOX-7 burned more completely than RDX indicating that FOX-7 can assist heat transfer and improve the combustion efficiency of RDX. |
| first_indexed | 2024-03-11T08:59:22Z |
| format | Article |
| id | doaj.art-da74560bbf214706bb1b2d87db394cdd |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T08:59:22Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-da74560bbf214706bb1b2d87db394cdd2023-11-16T19:54:23ZengMDPI AGCrystals2073-43522023-01-0113216710.3390/cryst13020167Preparation and Properties of RDX@FOX-7 Composites by Microfluidic TechnologyJin Yu0Hanyu Jiang1Siyu Xu2Heng Li3Yiping Wang4Ergang Yao5Qing Pei6Meng Li7Yang Zhang8Fengqi Zhao9Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, ChinaScience and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) is a type of high energy explosive, its application in weapon systems is limited by its high mechanical sensitivity. At the same time, 1,1-diamino-2,2-dinitroethylene (FOX-7) is a famous insensitive explosive. The preparation of RDX@FOX-7 composites can meet the requirements, high energy and low sensitivity, of the weapon systems. It is difficult for the reactor to achieve uniform quality of composite material, which affects its application performance. Based on the principle of solvent-anti-solvent, the recrystallization process was precisely controlled by microfluidic technology. The RDX@FOX-7 composites with different mass ratios were prepared. At the mass ratio of 10%, the RDX@FOX-7 composites are ellipsoid of about 15 μm with uniform distribution and quality. The advantages of microscale fabrication of composite materials were verified. The results of structure characterization showed that there is no new bond formation in RDX@FOX-7, but the distribution of two components on the surface of the composite was uniform. Based on the structure characterization, we established the structure model of RDX@RDX-7 and speculated the formation process of the composites in microscale. With the increase of FOX-7 mass ratios, the melting temperature of RDX was advanced, the thermal decomposition peak of RDX changed to double peaks, and the activation energy of RDX@FOX-7 composite decreased. These changes were more pronounced between 3 and 10% but not between 10 and 30%. The ignition delay time of RDX@FOX-7 was shorter than that of RDX and FOX-7. RDX@FOX-7 burned more completely than RDX indicating that FOX-7 can assist heat transfer and improve the combustion efficiency of RDX.https://www.mdpi.com/2073-4352/13/2/167composite explosivesmicrofluidiclaser ignitionRDX@FOX-7thermal analysismicro-Raman |
| spellingShingle | Jin Yu Hanyu Jiang Siyu Xu Heng Li Yiping Wang Ergang Yao Qing Pei Meng Li Yang Zhang Fengqi Zhao Preparation and Properties of RDX@FOX-7 Composites by Microfluidic Technology Crystals composite explosives microfluidic laser ignition RDX@FOX-7 thermal analysis micro-Raman |
| title | Preparation and Properties of RDX@FOX-7 Composites by Microfluidic Technology |
| title_full | Preparation and Properties of RDX@FOX-7 Composites by Microfluidic Technology |
| title_fullStr | Preparation and Properties of RDX@FOX-7 Composites by Microfluidic Technology |
| title_full_unstemmed | Preparation and Properties of RDX@FOX-7 Composites by Microfluidic Technology |
| title_short | Preparation and Properties of RDX@FOX-7 Composites by Microfluidic Technology |
| title_sort | preparation and properties of rdx fox 7 composites by microfluidic technology |
| topic | composite explosives microfluidic laser ignition RDX@FOX-7 thermal analysis micro-Raman |
| url | https://www.mdpi.com/2073-4352/13/2/167 |
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