Production and Characterization of Composite Nano‐RDX by RESS Co‐Precipitation

He, Beidi; Степанов, В. П.; Qiu, Huanguang; Krasnoperov, Lev N.

doi:10.1002/prep.201400249

Cited by 23 publications

(19 citation statements)

References 18 publications

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“…[249] Supercritical CO 2 was pumped at ac onstant mass flow rate throught he extraction vessela t1 3.0-20.5 MPa and 48-53 8C. [249] Supercritical CO 2 was pumped at ac onstant mass flow rate throught he extraction vessela t1 3.0-20.5 MPa and 48-53 8C.…”

Section: Hem Processing With Supercritical Fluidsmentioning

confidence: 99%

“…Nanoparticles of RDX were coated with polystyrene or poly-(vinylidenef luoride-co-hexafluoropropylene) (VDF-HFP 22 )p olymer films by RESS-type coprecipitation. [249] Supercritical CO 2 was pumped at ac onstant mass flow rate throught he extraction vessela t1 3.0-20.5 MPa and 48-53 8C. The poorly soluble RDX precipitated first, and then the polymer deposited on the surfaceo ft he RDX nanoparticles.…”

Section: Hem Processing With Supercritical Fluidsmentioning

confidence: 99%

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Prospective Symbiosis of Green Chemistry and Energetic Materials

et al. 2017

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A global increase in environmental pollution demands the development of new "cleaner" chemical processes. Among urgent improvements, the replacement of traditional hydrocarbon-derived toxic organic solvents with neoteric solvents less harmful for the environment is one of the most vital issues. As a result of the favorable combination of their unique properties, ionic liquids (ILs), dense gases, and supercritical fluids (SCFs) have gained considerable attention as suitable green chemistry media for the preparation and modification of important chemical compounds and materials. In particular, they have a significant potential in a specific and very important area of research associated with the manufacture and processing of high-energy materials (HEMs). These large-scale manufacturing processes, in which hazardous chemicals and extreme conditions are used, produce a huge amount of hard-to-dispose-of waste. Furthermore, they are risky to staff, and any improvements that would reduce the fire and explosion risks of the corresponding processes are highly desirable. In this Review, useful applications of almost nonflammable ILs, dense gases, and SCFs (first of all, CO ) for nitration and other reactions used for manufacturing HEMs are considered. Recent advances in the field of energetic (oxygen-balanced and hypergolic) ILs are summarized. Significant attention is paid to the SCF-based micronization techniques, which improve the energetic performance of HEMs through an efficient control of the morphology and particle size distribution of the HEM fine particles, and to useful applications of SCFs in HEM processing that makes them less hazardous.

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Section: Hem Processing With Supercritical Fluidsmentioning

confidence: 99%

Section: Hem Processing With Supercritical Fluidsmentioning

confidence: 99%

Prospective Symbiosis of Green Chemistry and Energetic Materials

et al. 2017

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“…As one class of them, nano-explosives have attracted much attention due to their potential application in micro thrusters [6] and micro-electromechanical systems [7]. Recently, benefiting from the development of nanotechnology, a variety of nano-explosives such as 1,3,5-trinitro-1,3,5-triazinane (RDX) [8,9], HMX [10,11], 1,1-diamino-2,2-dinitroethene (FOX-7) [12,13], 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazawurt-zitane (CL-20) [14,15] and TATB [16,17] have been successfully prepared by various approaches. With respect to LLM-105, Zhang et al [18] utilized a spray-crystalline method to prepare submicron size LLM-105.…”

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confidence: 99%

Facile Fabrication of Nanoparticles Stacked 2,6‐diamino‐3,5‐dinitropyrazine‐1‐oxide (LLM‐105) Sub‐microspheres via Electrospray Deposition

Huang

Liu

Ding

et al. 2017

Propellants Explo Pyrotec

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In this study, nanoparticles stacked 2,6‐diamino‐3,5‐dinitropyrazine‐1‐oxide (LLM‐105) sub‐microspheres were successfully fabricated by electrospray deposition. These monodisperse sub‐microspheres with a diameter from 200–500 nm are composed of 50 nm nanoparticles, and after preserved six months these spheres retain the same structure and morphology. The effect of process parameter including flow rate and nozzle size on the size and morphology of sub‐microsphere is investigated. The results show that, for a given solution concentration the nozzle size has little effect while the flow rate shows a significant effect. The X‐ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT‐IR) results exhibit that the as‐prepared sub‐microspheres have the same crystal and chemical structure as the raw materials. The thermal behavior performed by simultaneous thermal analysis (TG‐DSC) verifies that in comparison to the raw materials sub‐microspheres have a lower onset degradation temperature.

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“…8 Similar studies were also reported by Wang et al 9 and Bayat et al 10 ; they prepared nano-CL-20 via ultrasonic sprayassisted electrostatic adsorption technology and micro emulsion method, respectively. Furthermore, to reduce the sensitivities of explosives, other nanoenergetics also were reported, such as nano-HMX, [11][12][13][14][15] nano-RDX, [16][17][18] nano-NTO, 19 nano-HNS, 20,21 and nano-TATB. 22,23 The energetic nanocomposites are another form of nanoenergetics.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and properties of nitrocellulose/glycidyl azide polymer/2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane nanocomposites synthesized using a sol–gel supercritical method

Wang

Zhang

Song

et al. 2019

Nanomaterials and Nanotechnology

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nanoparticles uniformly embedded in nitrocellulose/glycidyl azide polymer matrix, were synthesized using a sol-gel supercritical method. The micron morphology, crystal phase, molecular structure, specific surface area, and surface elements were characterized using scanning electron microscopy, X-ray diffractometry, infrared, Brunauer-Emmett-Teller, and X-ray photoelectron spectroscopy analyses, respectively. Thermal analyses were performed, and the kinetic and thermodynamic parameters, such as activation energy, per-exponent factor, rate constant, activation heat, activation free energy, and activation entropy, were calculated. The decomposition products of the nitrocellulose/glycidyl azide polymer matrix and nitrocellulose/glycidyl azide polymer/2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane were also investigated by differential scanning calorimetry-infrared analysis. The result indicated that the main decomposition product of nitrocellulose/glycidyl azide polymer is carbon dioxide and theN 3 group in glycidyl azide polymer decomposed to nitrogen without being detected by infrared spectrometer; the main decomposition products of nitrocellulose/glycidyl azide polymer/2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane are carbon dioxide, nitrous oxide, and water, and few carbon monoxide, methane, and nitrogen oxide are also detected. Energy performances of nitrocellulose/glycidyl azide polymer matrix and nitrocellulose/glycidyl azide polymer/2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane nanocomposites were evaluated, that is, the parameters such as standard specific impulse, characteristic speed, combustion chamber temperature, average molecular weight of combustion products, and explosion heat were calculated. The results illustrated that as the weight percentage of nitrocellulose increases, the values of standard specific impulse, characteristic speed, average molecular weight of combustion products, combustion chamber temperature, and explosion heat increase. This was ascribed to that the oxygen balance of glycidyl azide polymer is substantially lower than that of nitrocellulose, which results in that the chemical energy of glycidyl azide polymer does not release sufficiently. Additionally, as weight percentage of glycidyl azide

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Production and Characterization of Composite Nano‐RDX by RESS Co‐Precipitation

Cited by 23 publications

References 18 publications

Prospective Symbiosis of Green Chemistry and Energetic Materials

Prospective Symbiosis of Green Chemistry and Energetic Materials

Facile Fabrication of Nanoparticles Stacked 2,6‐diamino‐3,5‐dinitropyrazine‐1‐oxide (LLM‐105) Sub‐microspheres via Electrospray Deposition

Characteristics and properties of nitrocellulose/glycidyl azide polymer/2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane nanocomposites synthesized using a sol–gel supercritical method

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