Particle size reduction of RDX by sequential application of solvent–antisolvent recrystallization and mechanical methods

Pandita, Priyanka; Arya, Vandana Pathania; Kaur, Gurvinder; Singh, Suman

doi:10.1080/07370652.2019.1687615

Cited by 10 publications

(5 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The asymmetric stretching vibration of −CH 2 in the RDX and controlled qy-RDX ring was at 3073 cm –1 , which is in agreement with the literature . The peaks near 1592 and 1271 cm –1 are attributed to −NO 2 asymmetric and N–NO 2 stretching vibrations (Figure ), respectively . The characteristic vibration peaks around 1214 and 780 cm –1 in FTIR spectra of RDX and controlled qy-RDX are due to N–C–N stretching and bending vibrations.…”

Section: Resultssupporting

confidence: 88%

“…20 The peaks near 1592 and 1271 cm −1 are attributed to −NO 2 asymmetric and N−NO 2 stretching vibrations (Figure 4), respectively. 21 The characteristic vibration peaks around 1214 and 780 cm −1 in FTIR spectra of RDX and controlled qy-RDX are due to N−C−N stretching and bending vibrations. It can be concluded that the microfluidic mixer crystallization of qy-RDX does not lead to any chemical change of the molecules.…”

Section: Chemical and Crystal Structures Of Controlled Qy-rdx 321 Che...mentioning

confidence: 99%

See 1 more Smart Citation

Thermal Reactivity of High-Density Hybrid Hexahydro-1,3,5-trinitro-1,3,5-triazine Crystals Prepared by a Microfluidic Crystallization Method

et al. 2023

View full text Add to dashboard Cite

In this paper, the two-dimensional (2D) high nitrogen triaminoguanidine−glyoxal polymer (TAGP) has been used to dope hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) crystals using a microfluidic crystallization method. A series of constraint TAGP-doped RDX crystals using a microfluidic mixer (so-called controlled qy-RDX) with higher bulk density and better thermal stability have been obtained as a result of the granulometric gradation. The crystal structure and thermal reactivity properties of qy-RDX are largely affected by the mixing speed of the solvent and antisolvent. In particular, the bulk density of qy-RDX could be slightly changed in the range from 1.78 to 1.85 g cm −3 as a result of varied mixing states. The obtained qy-RDX crystals have better thermal stability than pristine RDX, showing a higher exothermic peak temperature and an endothermic peak temperature with a higher heat release. E a for thermal decomposition of controlled qy-RDX is 105.3 kJ mol −1 , which is 20 kJ mol −1 lower than that of pure RDX. The controlled qy-RDX samples with lower E a followed the random 2D nucleation and nucleus growth (A2) model, whereas controlled qy-RDX with higher E a (122.8 and 122.7 kJ mol −1 ) following some complex model between A2 and the random chain scission (L2) model.

show abstract

Section: Resultssupporting

confidence: 88%

Section: Chemical and Crystal Structures Of Controlled Qy-rdx 321 Che...mentioning

confidence: 99%

Thermal Reactivity of High-Density Hybrid Hexahydro-1,3,5-trinitro-1,3,5-triazine Crystals Prepared by a Microfluidic Crystallization Method

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Therefore, based on the superfine technology mentioned above, it will be conductive that the preparation of ultra-fine NTO crystals will be possible if preparation methods can achieve a continuous high supersaturation state while enhancing the mixing degree of solvent and anti-solvent. Some studies have showed that ultrasonic wave, as an energy source, can induce nucleation at lower supersaturation and achieve a continuous supersaturation state to a certain degree [34][35][36]. Compared with conventional stirring, it reduces the metastable zone width and the induction time required for crystallization start and leads to rapid and uniform mixing, thus improving crystal morphology and crystal size distribution and reducing the agglomeration [37,38].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Ultra‐Fine 3‐Nitro‐1,2,4‐Triazole‐5‐One Crystals Using a Novel Ultrasonic–Assisted Spray Technology

Liu

Song

et al. 2022

Journal of Nanomaterials

View full text Add to dashboard Cite

The preparation of ultra-fine energetic materials still faces great challenges. In order to prepare the ultra-fine NTO crystals with controllable size and morphology, the study proposes a novel ultrasonic-assisted spray technology that can ensure the rapidity and safety of the preparation of ultra-fine NTO crystals. The as-prepared NTO crystals are characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the effects of solvent type, solution concentration, ultrasonic parameters, and anti-solvent on the morphology and average size of NTO crystals are investigated. The results obtained show that NTO ultra-fine crystals with an average particle size of 0.2 μm can be obtained quickly in optimum preparation conditions. The effectiveness of the technique presented for preparing ultra-fine spherical NTO crystals was demonstrated by comparison with baseline experiments. Ultrasonic-assisted spray technology offers a safe and fast route for the preparation of ultra-fine NTO particles and reveals an ideal method for the preparation of other ultra-fine energetic particles.

show abstract

“…10 However, in contrast, the cooling crystallization method by soaking the sample in a mixed solvent with stirring is simpler and more economical for large-scale preparation. 11 The explosive crystal obtained by the recrystallization method has the characteristics of high purity and high quality. Repeated grinding technique is a completely physical process that can achieve low-cost and mass production, and it will not cause environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization of spherical 1,1-diamino-2,2-dinitroethene (FOX-7), and study of its thermal decomposition characteristics

Zhao

et al. 2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

Particle size reduction of RDX by sequential application of solvent–antisolvent recrystallization and mechanical methods

Cited by 10 publications

References 27 publications

Thermal Reactivity of High-Density Hybrid Hexahydro-1,3,5-trinitro-1,3,5-triazine Crystals Prepared by a Microfluidic Crystallization Method

Thermal Reactivity of High-Density Hybrid Hexahydro-1,3,5-trinitro-1,3,5-triazine Crystals Prepared by a Microfluidic Crystallization Method

Preparation and Characterization of Ultra‐Fine 3‐Nitro‐1,2,4‐Triazole‐5‐One Crystals Using a Novel Ultrasonic–Assisted Spray Technology

Preparation, characterization of spherical 1,1-diamino-2,2-dinitroethene (FOX-7), and study of its thermal decomposition characteristics

Contact Info

Product

Resources

About