Accurate and efficient droplet microfluidic strategy for controlling the morphology of energetic microspheres

Zhou, Jinqiang; Wu, Bidong; Wang, Miao; Liu, Shujie; Xie, Zhanxiong; An, Chongwei; Wang, Jingyu

doi:10.1080/07370652.2021.1980152

Cited by 27 publications

(5 citation statements)

References 36 publications

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“…For instance, the resonant acoustic mixing (RAM) technology, developed by ResoDyn Corporation (USA), has been proven to exhibit a favorable thermal profile and flow field [82]. The microfluidic mixing method leverages diminutive scale flow channels in microfluidic systems to increase the surface-to-volume ratio, thereby offering advantages for mixing [83]. Electrohydrodynamic atomization (EHDA) enables the construction of unique microstructures for energetic materials, including core-shell, laminate, microcapsule, and porous microstructures, enhancing both high energy output and processing safety [84].…”

Section: Development Of Mixing Flow Fields In Mixing Equipmentmentioning

confidence: 99%

A comprehensive review on flow field properties in polymer mixing processes: a focus on applications in energetic materials

Wang,

Xie,

Liu

2024

Mater. Res. Express

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The mixing process is a critical step in the production of energetic materials and has a profound impact on product performance. As modern formulations for energetic materials continue to advance, the needs placed on the mixing process have become increasingly complex. Understanding and mastering the properties of the mixing flow field are essential for achieving optimal mixing function, ensuring process safety, and optimizing the parameters of both the mixing process and equipment specifically for energetic materials. In this comprehensive review, we analyze the influence of flow field properties on the mixing process of energetic materials by examining the mixing mechanism of two types of flow within the flow field. Additionally, we provide evidence to support the advantages of elongational flow in achieving effective mixing. We also discuss the application of mixing flow field properties in the processing of energetic materials, including advancements in mixing equipment and methods designed to optimize flow fields. Finally, we address the current shortcomings in energetic material mixing and offer an outlook for future developments in this field.

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Section: Development Of Mixing Flow Fields In Mixing Equipmentmentioning

confidence: 99%

A comprehensive review on flow field properties in polymer mixing processes: a focus on applications in energetic materials

Wang,

Xie,

Liu

2024

Mater. Res. Express

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“…Zhou [11] et al prepared TATB/F2602 microspheres using highly sensitive droplet microfluidic technology. The unique and high-quality environment of microfluidic technology facilitates the preparation of high-quality crystals with controllable particle size and shape [12][13][14]. The continuity and safety of the operation of the microfluidic platform make it extremely popular in the preparation of refine explosives.…”

Section: Introductionmentioning

confidence: 99%

A novel micromixer for efficient mixing and nano‐TATB preparation

Guo,

Zhou,

Liu

et al. 2023

Propellants Explo Pyrotec

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Passive micromixers are widely used in the preparation of ultrafine explosives because of their efficient mixing and necessary safety. A novel passive micromixer was designed to prepare nano‐TATB. Computational fluid dynamics (CFD) is used to simulate the opening width (K), fluid velocity and mixing performance of the micromixer. The results show that the proposed micromixer has good mixing performance in the Reynolds number (Re) range of 0.1~100, and its pressure drop less than 28204 Pa at Re=100. A microfluidic recrystallization system was established and nano‐TATB was prepared by a new micromixer. The results show that the average particle size of the prepared TATB is 93.12 nm, and the particle size distribution ranges from 43 nm to 151.4 nm. The SEM test shows that TATB has better morphological characteristics. XRD results show that the crystal structure of TATB is consistent with that of raw materials. This study proves that the new micromixer has good mixing effect and the feasibility of preparing nano TATB. It also provides reference for the design of micromixer and refinement of other energetic materials.

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“…One is to choose immiscible solvent phase and non-solvent phase, dissolve both energetic materials and insensitive materials in the solvent phase, and prepare composite microspheres by forming droplets. Using this principle, a variety of composite materials such as HNS@NC [18], nAl@PVDF@CL-20 [19], A@NC, Pb(N 3 ) 2 @NC [20], Zr@NC [21], TATB/F 2602 [22], HMX/F 2602 [23] were successfully prepared. The other is the principle that the energetic material is dissolved in the solvent phase, the insensitive material is dissolved in the non-solvent phase, and the core material is supersaturated and precipitated after the two phases are mixed.…”

Section: Introductionmentioning

confidence: 99%

One‐step preparation and characterization of insensitive HMX@PDA particles with microfluidic technology

Yu,

Jiang,

et al. 2023

Propellants Explo Pyrotec

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In order to improve the security of 1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocane (HMX) preparation and application process, microfluidic technology was used to improve the crystal quality and surface coating in one step. Using polydopamine (PDA) as coating material, the insensitive HMX@PDA particles were prepared. The morphology, particle size and crystal form of HMX@PDA are regulated by supersaturation. When the concentration of HMX is 0.15 g ⋅ mL−1, the flow ratio of the two‐phase solution is 1 : 1, and the total flow rate is 10 mL ⋅ min−1, the properties of the samples were optimized to the greatest extent. At this point, the particle size of the sample was about 25 μm, SPAN value is 1.02, which is a stable β‐HMX@PDA at room temperature. Through the test, the friction sensitivity and impact sensitivity of HMX@PDA were 36 % and 56 %, which were 52 % and 28 % lower than that of raw HMX, respectively. Meanwhile, the energy of HMX@PDA was not significantly decreased. Thermal analysis showed that PDA inhibited the β→δ crystallization process of HMX at high temperature but did not affect the thermal decomposition process of HMX. This case of preparing HMX@PDA in one‐step with microfluidic technology provides a new idea for the desensitization of energetic materials in the future.

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Accurate and efficient droplet microfluidic strategy for controlling the morphology of energetic microspheres

Cited by 27 publications

References 36 publications

A comprehensive review on flow field properties in polymer mixing processes: a focus on applications in energetic materials

A comprehensive review on flow field properties in polymer mixing processes: a focus on applications in energetic materials

A novel micromixer for efficient mixing and nano‐TATB preparation

One‐step preparation and characterization of insensitive HMX@PDA particles with microfluidic technology

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