Preparation of Hollow Energetic Microspheres with Enhanced Safety and Combustion Performance Assisted by Microjetting Droplet Technology DOI
Yi Liu, Jiahui Shi, Yunyan Guo

et al.

Published: Jan. 1, 2023

Hollow energetic microspheres have attracted great attention in the field of materials due to their wide application potential. However, scalable, simple, and low-cost production methods not been achieved yet. In this study, using nitrocellulose (NC) as a binder, hollow porous CL-20 were prepared by assist microjet droplet technology. The effects solution concentration, receiving liquid temperature, solvent type on morphology, particle size, shell thickness, pore size systematically investigated. Furthermore, influences thickness dispersibility, crystal structure, thermal decomposition, mechanical sensitivity, combustion behavior further studied. results showed that precise control over could be adjusting experimental parameters. Compared raw CL-20, exhibited excellent dispersibility improved safety performance. Ignition experiments demonstrated structures significantly enhanced flame energy release efficiency. This preparation method is simple efficient, providing new approach for fabrication multi-structured microspheres.

Language: Английский

Regulating hollow structure of CL-20 microspheres using microjet droplet technology to enhance safety and combustion performance DOI
Yi Liu, Jiahui Shi, Yunyan Guo

et al.

Fuel, Journal Year: 2023, Volume and Issue: 361, P. 130748 - 130748

Published: Dec. 27, 2023

Language: Английский

Citations

25
Hierarchical nanoarchitectonics of hollow hexanitrostilbene (HNS) microspheres to improve safety and combustion performance DOI
Yi Liu,

Jiani Xie,

Yunyan Guo

et al.

Fuel, Journal Year: 2024, Volume and Issue: 378, P. 132916 - 132916

Published: Aug. 27, 2024

Language: Английский

Citations

8
Preparation of hexanitrostilbene/aluminum microspheres with interconnected multi-cavity structure for enhanced safety and combustion performance DOI
Yi Liu, Yunyan Guo, Fan Wang

et al.

Particuology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

0
High-Quality Preparation of Energy-Containing Microspheres with Cross-Scale Particle Size DOI Creative Commons
Jiang Liu,

Hairui Bian,

G. Yu

et al.

Micromachines, Journal Year: 2025, Volume and Issue: 16(4), P. 416 - 416

Published: March 31, 2025

Microfluidic granulation technology enables high-quality production of energy-containing microspheres, significantly enhancing both performance and safety. Although microfluidic methods allow control over microsphere particle size, the adjustment range remains limited; low yield process discontinuity also restrict broader application in synthesis materials. This paper presents a system for materials utilizing pulsed pneumatic printing, co-flow, flow-focusing techniques to achieve wide size adjustment, consistent formation, high speed, efficiency. allows sizes between 110 2500 μm, with coefficient variation (CV) as 1.9%, frequency exceeding 13,000 Hz, suspension consumption rate reaching 100 mL/h. Calcium alginate/potassium perchlorate prepared sodium alginate hydrogel binder, exhibit uniform structure, narrow distribution, efficient energy material loading. We anticipate further advancements applying based on this system.

Language: Английский

Citations

0
Prediction of crystal form and study on crystal growth characteristics of TKX-55—a novel heat-resistant energetic material DOI
Bi‐Dong Wu,

Lei Tong,

Yunyan Guo

et al.

The Journal of Chemical Physics, Journal Year: 2025, Volume and Issue: 162(16)

Published: April 22, 2025

5,5′-Bis(2,4,6-trinitrophenyl)-2,2′-bi(1,3,4-oxadiazole) (TKX-55) is a new type of heat-resistant energetic material with excellent detonation performance. To study the crystal particle morphology and size control TKX-55, this predicted structure TKX-55 through quantum chemistry molecular dynamics simulations as well simulated analyzed changes that occur under influence specific solvents habit modification. Based on simulation results, designed five different recrystallization methods prepared recrystallized products morphologies distributions. The growth mechanism was discussed. samples were characterized using scanning electron microscopy, powder x-ray diffraction, infrared spectroscopy techniques. thermal properties tested differential calorimetry thermogravimetric analysis. impact sensitivity sample tested, it found product significantly lower than raw material. Through combination experiment, ultimately obtained three rules, narrow distribution, effectively improved safety particles.

Language: Английский

Citations

0
Controllable preparation of hexanitrostilbene (HNS) microspheres with multi-cavity structure to enhance safety and combustion performance DOI
Yi Liu, Yunyan Guo,

Jiafei Li

et al.

Powder Technology, Journal Year: 2024, Volume and Issue: 449, P. 120397 - 120397

Published: Oct. 25, 2024

Language: Английский

Citations

3
Design and Experimental Characterization of a Microfluidic Piezoelectric Pump Utilizing P(VDF-TrFE) Film DOI Open Access
Bei Zhao,

Xiaomeng Li,

Jing Shi

et al.

Coatings, Journal Year: 2024, Volume and Issue: 14(12), P. 1483 - 1483

Published: Nov. 24, 2024

Advancements in wearable technology and lab-on-chip devices necessitate improved integrated microflow pumps with lower driving voltages. This study examines a piezoelectric pump using flexible β-phase copolymer poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) film. Six samples (S1–S6) were fabricated subjected to three-step annealing process optimize their properties. Characterization was conducted via atomic force microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, impedance analysis, polarization hysteresis loop measurements. The results show that at approximately 135 degrees Celsius produces structure uniform “rice grain”-like crystallites. A microfluidic nozzle/diffuser structure, S4 film as the drive layer, designed manufactured. Diaphragm deformation performance assessed, showing maximum water flow rate of 25 µL/min 60 Hz peak-to-peak voltage (Vpp) V. could be precisely controlled within 0–25 by adjusting Vpp frequency. effectively reduced pump, it has significant implications for smart devices.

Language: Английский

Citations

0
Preparation of Hollow Energetic Microspheres with Enhanced Safety and Combustion Performance Assisted by Microjetting Droplet Technology DOI
Yi Liu, Jiahui Shi, Yunyan Guo

et al.

Published: Jan. 1, 2023

Hollow energetic microspheres have attracted great attention in the field of materials due to their wide application potential. However, scalable, simple, and low-cost production methods not been achieved yet. In this study, using nitrocellulose (NC) as a binder, hollow porous CL-20 were prepared by assist microjet droplet technology. The effects solution concentration, receiving liquid temperature, solvent type on morphology, particle size, shell thickness, pore size systematically investigated. Furthermore, influences thickness dispersibility, crystal structure, thermal decomposition, mechanical sensitivity, combustion behavior further studied. results showed that precise control over could be adjusting experimental parameters. Compared raw CL-20, exhibited excellent dispersibility improved safety performance. Ignition experiments demonstrated structures significantly enhanced flame energy release efficiency. This preparation method is simple efficient, providing new approach for fabrication multi-structured microspheres.

Language: Английский

Citations

0