Preparation, Characterization and Properties of A New CL-20/TKX-50 Cocrystal Explosive

被引：0

作者：

Yuan S. ^{[1
]}

Gou B.-W. ^{[2
]}

Guo S.-F. ^{[2
]}

Xiao L. ^{[1
]}

Hu Y.-B. ^{[1
]}

Chen T. ^{[1
]}

Hao G.-Z. ^{[1
]}

Jiang W. ^{[1
]}

机构：

[1] National Special Superfine Powder Engineer Research Center s, Nanjing University of Science and Technology, Nanjing

[2] Xi'an Modern Chemistry Research Institute, Xi'an

来源：

Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2020年 / 43卷 / 02期

关键词：

CL-20; Cocrystal; Energetic material; Sensitivity; Thermal analysis; TKX-50;

D O I：

10.14077/j.issn.1007-7812.201904010

中图分类号：

学科分类号：

摘要：

To reduce the sensitivity of CL-20, the CL-20/TKX-50 cocrystal explosive was successfully prepared by solvent-nonsolvent method. The surface electrostatic potentials of CL-20 and TKX-50 were analyzed by Materials Studio 5.0 software, and the possible noncovalent bonding between cocrystal molecules was predicted. Its morphology and structure were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared (IR) and Raman spectroscopy (Raman). The thermal properties were measured by differential scanning calorimetry (DSC), the impact sensitivity was tested and the detonation performance was predicted. The results show that the prepared CL-20/TKX-50 cocrystal has a flat sheet shape. The formation, disappearance, shift and change of intensity of peaks in XRD, IR and Raman spectra prove the formation of a new lattice structure. At the heating rate of 8℃/min, the main thermal decomposition peak temperature of CL-20/TKX-50 cocrystal is 222.8℃, that is 17.5℃ and 12.1℃ earlier than that of CL-20 and TKX-50 at 240.3℃ and 234.9℃, respectively, which is obviously different from that of CL-20/TKX-50 mixture with two exothermic processes. The sensitivity of CL-20/TKX-50 cocrystal explosive is significantly lower than that of CL-20 and better than that of β-HMX, which indicates that it has good safety performance. The predicted detonation velocity and detonation pressure of CL-20/TKX-50 cocrystal are 9264m/s and 43.8GPa, slightly lower than that of CL-20, while compared with β-HMX, the detonation performance is significantly improved. Both the surface electrostatic potential energy and modeling analysis show that hydrogen bond is easy to form between O of -NO2 in CL-20 and H of -NH3 + in TKX-50. © 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved.

引用

页码：167 / 172and179

共 16 条

[1] Jia X.-L., Hou C.-H., Wang J.-Y., Et al., Research Progress on Sensitization Reduction Technology of Nitramine explosives, Chinese Journal of Explosives & Propellants(Huozhayao Xuebao), 41, 4, pp. 326-333, (2018)
[2] Huang B., Hao X., Zhang H., Et al., Ultrasonic approach to the synthesis of HMX@TATB core-shell microparticles with improved mechanical sensitivity, Ultrasonics Sonochemistry, 21, 4, pp. 1349-1357, (2014)
[3] Cowey K., Day S., Fryer R., Examination of wax-coated RDX by scanning electron microscopy and X-ray photoelectron spectroscopy, Propellants, Explosives, Pyrotechnics, 10, 3, pp. 61-64, (2010)
[4] Bayat Y., Zarandi M., Zarei M., Et al., A novel approach for preparation of CL-20 nanoparticles by microemulsion method, Journal of Molecular Liquids, 193, pp. 83-86, (2014)
[5] Radacsi N., Stankiewicz A.I., Creyghton Y.L., Et al., Electrospray crystallization for high-quality submicron-sized crystals, Chemical Engineering & Technology, 34, 4, pp. 624-630, (2011)
[6] Czerski H., Proud W., Relationship between the morphology of granular cyclotrimethylene-trinitramine and its shock sensitivity, Journal of Applied Physics, 102, 11, (2007)
[7] Liu K., Zhang G., Chen Z.-Q., Et al., Research progress of eutectic energetic materials, Chemometrics, 8, 5, pp. 139-142, (2014)
[8] Bolton, Matzger A.J., Improved stability and smart-material functionality realized in an energetic cocrystal, Angewandte Chemie-International Edition, 50, 38, pp. 8960-8963, (2011)
[9] Bolton O., Simke L.R., Pagoria P.F., Et al., High power explosive with good sensitivity: A 2: 1 cocrystal of CL-20: HMX, Crystal Growth & Design, 12, 9, pp. 4311-4314, (2012)
[10] Wang Y., Yang Z., Li H., Et al., A novel cocrystal explosive of HNIW with good comprehensive properties, Propellants, Explosives, Pyrotechnics, 39, 4, pp. 590-596, (2014)

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