Microfluidic strategy for rapid and high-quality control of crystal morphology of explosives

Shi, Jinyu; Zhu, Peng; Zhao, Shufan; Shen, Ruiqi; Xia, Huan; Jiang, Hanyu; Xu, Shidang

doi:10.1039/d0re00119h

Cited by 26 publications

(5 citation statements)

References 38 publications

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“…Figure 1 shows the microfluidic platform for preparation of HMX, which consists of syringe pumps, a crystallization unit, an ultrasonic wave oscillator, a collection device and connecting PTFE tubes with an inner diameter of 800 μm and an outside diameter of 1600 μm. The double chamber swirling micromixer was selected as the crystallization unit because of its fast and efficient mixing which has been verified in our previous works [ 34 ]. The introduction of ultrasonic wave oscillator can not only enhance the mixing of solvent and antisolvent, but also effectively solve the blockage problem in the preparation process, which is conducive to prepare the ultrafine HMX with narrow particle size distribution.…”

Section: Methodsmentioning

confidence: 99%

Size, Morphology and Crystallinity Control Strategy of Ultrafine HMX by Microfluidic Platform

Jiang

Yu²,

Zhou

et al. 2023

Nanomaterials

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The crystal structure has a great influence on mechanical sensitivity and detonation performance of energetic materials. An efficient microfluidic platform was applied for size, morphology, and crystallinity controllable preparation of ultrafine HMX. The microfluidic platform has good mixing performance, quick response, and less reagent consumption. The ultrafine γ-HMX was first prepared at room temperature by microfluidic strategy, and the crystal type can be controlled accurately by adjusting the process parameters. With the increase in flow ratio, the particle size decreases gradually, and the crystal type changed from β-HMX to γ-HMX. Thermal behavior of ultrafine HMX shows that γ→δ is easier than β→δ, and the phase stability of HMX is β > γ > δ. Furthermore, the ultrafine β-HMX has higher thermal stability and energy release efficiency than that of raw HMX. The ultrafine HMX prepared by microfluidic not only has uniform morphology and narrow particle size distribution, but also exhibits high density and low sensitivity. This study provides a safe, facile, and efficient way of controlling particle size, morphology, and crystallinity of ultrafine HMX.

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Section: Methodsmentioning

confidence: 99%

Size, Morphology and Crystallinity Control Strategy of Ultrafine HMX by Microfluidic Platform

Jiang

Yu²,

Zhou

et al. 2023

Nanomaterials

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“…Benefiting from its high oscillation frequency, the NDR oscillator can drastically improve fluid mixing [205,216]. It was tested to prepare solid lipid nanoparticles and micro/nano energetic materials [219][220][221]. Due to the enhanced mixing process, products with highly uniform size and morphology were obtained.…”

Section: Xia Et Al Reported a Microfluidic Oscillator Based On Flow-i...mentioning

confidence: 99%

Nonlinear microfluidics: device physics, functions, and applications

Xia

Zheng

et al. 2021

Lab Chip

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“…Additionally, microchannels require small reagent volumes, resulting in lower contents of hazardous substances. The higher surface area and efficient mass transfer and heat transfer in microchannels are unfavorable for hotspot formation, possessing intrinsic safety. , A microarray chip-based method for ultramixed composite systems has already demonstrated the advantages of microfluidic technology in improving multicomponent mixing quality . However, the postprocessing methods used in current microfluidic processes, such as filtration or freeze-drying, are challenging to achieve continuous preparation.…”

Section: Introductionmentioning

confidence: 99%

Construction of Ultra-Mixed Energetic Composite Systems by Micro Continuous Flow Coupled with Spray Drying Technology

Liu,

Fei,

Zhou

et al. 2024

Ind. Eng. Chem. Res.

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Improving the quality of mixing between multiple components is expected to enhance the macroscopic performance of the composite energetic materials. To address the limitations associated with intermittent manual techniques in multicomponent mixing, a novel strategy that integrates microfluidic with spray drying technology was proposed to achieve the safe and continuous fabrication of ultramixed energetic composites. B/KNO 3 was utilized as a representative example to validate the applicability of this strategy. This strategy allows for the simultaneous refinement of raw materials and assembly of multicomponent microscale interfaces, enabling a "one-step" synthesis approach. A microscale assembly model for composite components was constructed and applied to describe the microscopic morphology of the composite particles under different conditions. The microscopic morphology of B/KNO 3 was analyzed under different component concentrations, drying temperatures, and gas flow rates to validate the applicability of the model. Based on the TG−DSC results, a qualitative explanation was provided for the relationship between the microstructural configuration of the composite system and its macroscopic thermal performance when the B/KNO 3 ratio is constant. In addition, laser ignition experiments were conducted to evaluate the combustion characteristics of the ultramixed B/KNO 3 . Encouragingly, the quality of interfacial composite materials plays a crucial role in influencing the macroscopic reactivity, as the ultramixed B/KNO 3 exhibits consistent burning rates and high delay accuracy. The proposed micro continuous flow-spray strategy not only offers novel insights into modulating the macroscopic performance of composite energetic materials through enhanced interfacial blending but also provides valuable references for the continuous fabrication of other composite materials. Moreover, this strategy prioritizes intrinsic safety aspects and effectively addresses pertinent concerns associated with the handling and processing of energetic materials.

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Microfluidic strategy for rapid and high-quality control of crystal morphology of explosives

Abstract: A new strategy based on a microfluidic platform is proposed for the rapid and high-quality control of explosives' crystal morphology.

Cited by 26 publications

References 38 publications

Size, Morphology and Crystallinity Control Strategy of Ultrafine HMX by Microfluidic Platform

Size, Morphology and Crystallinity Control Strategy of Ultrafine HMX by Microfluidic Platform

Nonlinear microfluidics: device physics, functions, and applications

Construction of Ultra-Mixed Energetic Composite Systems by Micro Continuous Flow Coupled with Spray Drying Technology

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