Fabrication of Ultra‐Fine TATB/HMX Cocrystal Using a Compound Solvent

Abstract

A novel energetic cocrystal predicted to exhibit greater power and lower sensitivity, consisting of 1,3,5‐triamino‐2,4,6‐trinitrobenzene (TATB) and cyclotetramethylenetetranitramine (HMX) is presented. The TATB/HMX cocrystals were prepared using a compound solvent of [Emim]Ac and DMSO at 80 °C by recrystallization. Structural characterizations and thermal properties of the raw materials and cocrystals were systematically investigated by scanning electron microscopy (SEM), X‐ray diffraction, fourier‐transform infrared spectroscopy, fourier transform raman spectroscopy and differential scanning calorimetry. The SEM results indicated that microparticles are hexagonal in shape and ∼2 μm in size. The formation of cocrystals originates from the N−H⋅⋅⋅O hydrogen bonding between ‐NO2 (HMX) and ‐NH2 (TATB). Naturally, compared to raw HMX, the impact sensitivity of the cocrystals is reduced. The EXPLO5 program showed TATB/HMX with desirable detonation performance.

Different Stoichiometric Ratios Realized in Energetic–Energetic Cocrystals Based on CL-20 and 4,5-MDNI: A Smart Strategy to Tune Performance

“…Cocrystallization technology, extensively applied in the pharmaceutical fields, has been considered as an effective tool to effectively tune the solubility, bioavailability, absorptivity, and stability of drugs by pharmaceutical cocrystals. − Since cocrystals exhibit superior modifying properties, cocrystallization has been adopted to synthesize energetic–energetic cocrystal to tune performances of existing explosives in the energetic material fields. − Energetic–energetic cocrystals generally are composed of two or more different energetic molecules with a defined stoichiometric ratio assembled in a crystal lattice via noncovalent interactions. , Thus far, numerous energetic–energetic cocrystals based on CL-20 and other energetic materials have been reported. − According to the characterized results of structures and properties for energetic–energetic cocrystals, energetic cocrystals are found to be able to effectively alter the properties of existing explosives including density, thermal property, sensitivity, and detonation performance. However, the majority of energetic–energetic cocrystals usually exhibit a 1:1 stoichiometric ratio at present .…”

Synthesis of Energetic 7-Nitro-3,5-dihydro-4H-pyrazolo[4,3-d][1,2,3]triazin-4-one Based on a Novel Hofmann-Type Rearrangement

“…The morphology of NPTO was examined with a HITACHI (Japan) S-3400N-II Scanning Electron Microscope (SEM) at 5 kV and 10 mA. ( Figure S7 ) Crystal quality, including the crystal shape, surface and defects, plays an important role in the safe storage and transport of an energetic material, and ultimately affects the detonation performance of the explosive [ 32 , 33 ]. As shown in Figure 7 , the crystal exhibits a colorless-prism-type morphology with a uniform size, regular structure and smooth surface.…”

Constructing Novel RDX with Hierarchical Structure via Dye-Assisted Solvent Induction and Interfacial Self-Assembly

“…Possible interaction mechanisms between RDX and NR dye are summarized in Figure S1c. Hydrogen bonds between -NH 2 and -NO 2 may contribute a lot to the strong interaction . The -NH 2 group in NR, as well as lone paired electrons and conjugate π-electrons in phenazine ring, may act as electron donors to couple with RDX, which has a strong electron acceptor group (-NO 2 ).…”