Preparation of Hollow Energetic Microspheres with Enhanced Safety and Combustion Performance Assisted by Microjetting Droplet Technology

21 Pages Posted: 2 Nov 2023

See all articles by Yi Liu

Yi Liu

North University of China

Jiahui Shi

North University of China

Yunyan Guo

North University of China

Zhihua Xue

North University of China

Kai Han

North University of China

Shujie Liu

Shijiazhuang University

Chongwei An

North University of China

Zhongliang Ma

North University of China

Bidong Wu

North University of China

Abstract

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

Keywords: Hollow microspheres, Porous structure, Energetic materials, Microdroplets, Combustion

Suggested Citation

Liu, Yi and Shi, Jiahui and Guo, Yunyan and Xue, Zhihua and Han, Kai and Liu, Shujie and An, Chongwei and Ma, Zhongliang and Wu, Bidong, Preparation of Hollow Energetic Microspheres with Enhanced Safety and Combustion Performance Assisted by Microjetting Droplet Technology. Available at SSRN: https://ssrn.com/abstract=4621484 or http://dx.doi.org/10.2139/ssrn.4621484

Yi Liu

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

Jiahui Shi

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

Yunyan Guo

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

Zhihua Xue

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

Kai Han

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

Shujie Liu

Shijiazhuang University ( email )

Shijiazhuang
China

Chongwei An

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

Zhongliang Ma

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

Bidong Wu (Contact Author)

North University of China ( email )

No. 3 Xueyuan Road, Taiyuan, China
taiyuan, 030051
China

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