Plasticization of Submicron-Structured LOVA Propellants by a Linear Dinitramine

Brize, Axel Le; Spitzer, Denis

doi:10.22211/cejem/64956

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Composite LOVA propellants were also prepared by SFE from solutions of nitrocellulose, a plasticizer (2,4-dinitro-2,4diazahexan: DNDA6) and hexogen, in ethyl acetate [21]. In this domain, SFE makes possible the preparation of propulsive powders with a better homogeneity, in a single step.…”

Section: Preparation Of Fine Explosive Powdersmentioning

confidence: 99%

Energetic Nanoparticles and Nanomaterials for Future Defense Applications

Comet

Martin

Schnell

et al. 2019

Hum Factors Mech Eng Def Saf

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The integration of nanostructured materials in defense systems is expected to improve their performance in terms of power, safety, and reliability. That is why considerable research effort has been undertaken by major military powers worldwide in this domain. The first important step was to develop the production capacities of organic explosives in the state of fine powders with submicron to nanosized particle size distributions. The Spray Flash Evaporation (SFE) process, which is a unique method for producing such materials, was developed at industrial scale. Explosive nanopowders obtained by this process were subsequently mixed with nanosized pyrotechnic compositions such as nanothermites, to prepare hybrid detonating materials able to replace lead-based primary explosives. Composite propellants can also be prepared by SFE which allows mixing their components in a single step with better homogeneity. The ultimate challenge is to move from powder to object, in order to integrate energetic nanomaterials in operational systems. Although the research in this last domain is still in its infancy, several ways of preparation of objects from nanothermites have been recently reported in scientific literature. The focus will be on two examples studied in our laboratory. The first one is the preparation of nanothermites in the state of solid, porous foams; the second one is the use of nanothermites for coating grains of propulsive powder to change their combustion properties.

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Section: Preparation Of Fine Explosive Powdersmentioning

confidence: 99%

Energetic Nanoparticles and Nanomaterials for Future Defense Applications

Comet

Martin

Schnell

et al. 2019

Hum Factors Mech Eng Def Saf

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“…However, the SFE clearly demonstrated the feasibility of faster and quite efficient crystallization of inorganic particles from precursors. Le Brize and Spitzer [ 120 ] processed energetic composite materials by SFE: a sub-micrometer structure was evidenced from SEM pictures and an higher degree of chemical interaction was also found from IR and Raman spectra. The high versatility of the SFE permits the processing of liquid (poly(ethylene glycol) (PEG) 400) and solid (PVP 40k) polymers to tune the RDX particle size distribution from the nanometer to the micrometer scale with controlled shapes [ 121 ].…”

Section: Reviewmentioning

confidence: 99%

The longstanding challenge of the nanocrystallization of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX)

Pessina¹,

Spitzer²

2017

Beilstein J. Nanotechnol.

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Research efforts for realizing safer and higher performance energetic materials are continuing unabated all over the globe. While the thermites – pyrotechnic compositions of an oxide and a metal – have been finely tailored thanks to progress in other sectors, organic high explosives are still stagnating. The most symptomatic example is the longstanding challenge of the nanocrystallization of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX). Recent advances in crystallization processes and milling technology mark the beginning of a new area which will hopefully lead the pyroelectric industry to finally embrace nanotechnology. This work reviews the previous and current techniques used to crystallize RDX at a submicrometer scale or smaller. Several key points are highlighted then discussed, such as the smallest particle size and its morphology, and the scale-up capacity and the versatility of the process.

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“…The size reduction is performed by recrystallization on the submicron scale using the Spray Flash Evaporation process. This technology proved its ability to produce submicron explosives and oxidants [34,35] as well as non-energetic organic compounds, co-crystals and diverse composites [36,37]. It is based on the spray of a superheated solution.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Oxygen Balance of Energetic Composites: Crystallization of ADN/Secondary Explosives Mixtures by Spray Flash Evaporation

Lobry

Berthe

Hübner

et al. 2021

Propellants Explo Pyrotec

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New energetic composites with enhanced reactive performances while allowing the safe handling according to their sensitivity thresholds are presented. This paper combines different approaches: the intimate contact between the compounds, the particle size reduction and the processing of composite materials to maintain the oxygen balance close to zero. The Spray Flash Evaporation process enables the fast crystallization at the submicron scale by combining an oxidizer, ammonium dinitramide ADN and two secondary explosives (RDX and HMX). The morphologies of the particles were analyzed and compared with slow evaporation tests. An intimate mixing between the two components (crystallized by SFE) is highlighted and core‐shell structure is evidenced by advanced techniques such as 2D and 3D confocal Raman microscopy. The composites offer outstanding energetic performances compared to sole explosives. It paves the way to new energetic compositions based on current materials.

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Plasticization of Submicron-Structured LOVA Propellants by a Linear Dinitramine

Cited by 4 publications

References 12 publications

Energetic Nanoparticles and Nanomaterials for Future Defense Applications

Energetic Nanoparticles and Nanomaterials for Future Defense Applications

The longstanding challenge of the nanocrystallization of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX)

Tuning the Oxygen Balance of Energetic Composites: Crystallization of ADN/Secondary Explosives Mixtures by Spray Flash Evaporation

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