One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology
Energetic materials pose challenges in preparation and handling due to their contradictory properties of high-energy and low-sensitivity. The emergence of co-crystal explosives is a new opportunity to change this situation. If the co-crystal explosive is coated into spherical particles with uniform...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2023-09-01
|
| Series: | Defence Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914722002136 |
| _version_ | 1797671398464815104 |
|---|---|
| author | Jiahui Shi Bidong Wu Jinqiang Zhou Dawei Ren Dongxu Zhang Chongwei An Jingyu Wang |
| author_facet | Jiahui Shi Bidong Wu Jinqiang Zhou Dawei Ren Dongxu Zhang Chongwei An Jingyu Wang |
| author_sort | Jiahui Shi |
| collection | DOAJ |
| description | Energetic materials pose challenges in preparation and handling due to their contradictory properties of high-energy and low-sensitivity. The emergence of co-crystal explosives is a new opportunity to change this situation. If the co-crystal explosive is coated into spherical particles with uniform particle size distribution, this contradiction can be further reduced. Therefore, binder-coated hexanitrohexaazaisowurtzitane/2,4,6-trinitrotoluene (CL-20/TNT) co-crystal microspheres were prepared by droplet microfluidic technology in this work. The coating effects of different binder formulations of nitrocellulose (NC) and NC/fluorine rubber (F2604) on the co-crystal spheres were studied. The scanning electron microscopy (SEM) results showed that the use of droplet microfluidic technology with the above binders can provide co-crystal microspheres with regular spherical morphology, uniform particle size distribution and good dispersion. X-ray diffraction (XRD), fourier-transform infrared (FT-IR), differential scanning calorimetry (DSC) and thermo-gravimetric (TG) methods were employed to compare the properties of the co-crystal microspheres, raw material and pure co-crystal. The formation of CL-20/TNT co-crystal in the microspheres was confirmed, and the co-crystal microspheres exhibited better thermal stability than the raw material and pure co-crystal. In addition, the mechanical sensitivity and combustion performance of the co-crystal microspheres were further studied. The results showed that the co-crystal microspheres were more insensitive than CL-20 and pure co-crystal, and displayed excellent self-sustained combustion performance and theoretical detonation performance. This study provides a new method for the fast, simple and one-step preparation of CL-20/TNT co-crystal microspheres, with binder coating, uniform particle size distribution, and excellent performance level. |
| first_indexed | 2024-03-11T21:14:57Z |
| format | Article |
| id | doaj.art-72fd3a1359f84398a83dc278c3afd01b |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-03-11T21:14:57Z |
| publishDate | 2023-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-72fd3a1359f84398a83dc278c3afd01b2023-09-29T04:44:16ZengKeAi Communications Co., Ltd.Defence Technology2214-91472023-09-0127251262One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technologyJiahui Shi0Bidong Wu1Jinqiang Zhou2Dawei Ren3Dongxu Zhang4Chongwei An5Jingyu Wang6School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, ChinaSchool of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China; Corresponding author.School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China; School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, ChinaSchool of Environment and Safety Engineering, North University of China, Taiyuan, 030051, ChinaSchool of Environment and Safety Engineering, North University of China, Taiyuan, 030051, ChinaSchool of Environment and Safety Engineering, North University of China, Taiyuan, 030051, ChinaSchool of Environment and Safety Engineering, North University of China, Taiyuan, 030051, ChinaEnergetic materials pose challenges in preparation and handling due to their contradictory properties of high-energy and low-sensitivity. The emergence of co-crystal explosives is a new opportunity to change this situation. If the co-crystal explosive is coated into spherical particles with uniform particle size distribution, this contradiction can be further reduced. Therefore, binder-coated hexanitrohexaazaisowurtzitane/2,4,6-trinitrotoluene (CL-20/TNT) co-crystal microspheres were prepared by droplet microfluidic technology in this work. The coating effects of different binder formulations of nitrocellulose (NC) and NC/fluorine rubber (F2604) on the co-crystal spheres were studied. The scanning electron microscopy (SEM) results showed that the use of droplet microfluidic technology with the above binders can provide co-crystal microspheres with regular spherical morphology, uniform particle size distribution and good dispersion. X-ray diffraction (XRD), fourier-transform infrared (FT-IR), differential scanning calorimetry (DSC) and thermo-gravimetric (TG) methods were employed to compare the properties of the co-crystal microspheres, raw material and pure co-crystal. The formation of CL-20/TNT co-crystal in the microspheres was confirmed, and the co-crystal microspheres exhibited better thermal stability than the raw material and pure co-crystal. In addition, the mechanical sensitivity and combustion performance of the co-crystal microspheres were further studied. The results showed that the co-crystal microspheres were more insensitive than CL-20 and pure co-crystal, and displayed excellent self-sustained combustion performance and theoretical detonation performance. This study provides a new method for the fast, simple and one-step preparation of CL-20/TNT co-crystal microspheres, with binder coating, uniform particle size distribution, and excellent performance level.http://www.sciencedirect.com/science/article/pii/S2214914722002136Droplet microfluidicsCL-20TNTCo-crystalSpherical coating |
| spellingShingle | Jiahui Shi Bidong Wu Jinqiang Zhou Dawei Ren Dongxu Zhang Chongwei An Jingyu Wang One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology Defence Technology Droplet microfluidics CL-20 TNT Co-crystal Spherical coating |
| title | One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology |
| title_full | One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology |
| title_fullStr | One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology |
| title_full_unstemmed | One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology |
| title_short | One-step rapid preparation of CL-20/TNT co-crystal assembly and spheroidized coating based on droplet microfluidic technology |
| title_sort | one step rapid preparation of cl 20 tnt co crystal assembly and spheroidized coating based on droplet microfluidic technology |
| topic | Droplet microfluidics CL-20 TNT Co-crystal Spherical coating |
| url | http://www.sciencedirect.com/science/article/pii/S2214914722002136 |
| work_keys_str_mv | AT jiahuishi onesteprapidpreparationofcl20tntcocrystalassemblyandspheroidizedcoatingbasedondropletmicrofluidictechnology AT bidongwu onesteprapidpreparationofcl20tntcocrystalassemblyandspheroidizedcoatingbasedondropletmicrofluidictechnology AT jinqiangzhou onesteprapidpreparationofcl20tntcocrystalassemblyandspheroidizedcoatingbasedondropletmicrofluidictechnology AT daweiren onesteprapidpreparationofcl20tntcocrystalassemblyandspheroidizedcoatingbasedondropletmicrofluidictechnology AT dongxuzhang onesteprapidpreparationofcl20tntcocrystalassemblyandspheroidizedcoatingbasedondropletmicrofluidictechnology AT chongweian onesteprapidpreparationofcl20tntcocrystalassemblyandspheroidizedcoatingbasedondropletmicrofluidictechnology AT jingyuwang onesteprapidpreparationofcl20tntcocrystalassemblyandspheroidizedcoatingbasedondropletmicrofluidictechnology |