Preparation of HNS microspheres by rapid membrane emulsification--颗粒学报PARTICUOLOGY

Huo, H., Ye, B., Shi, Y., Feng, C., Wang, J., Li, M., . . . An, C. (2023). Preparation of HNS microspheres by rapid membrane emulsification. Particuology, 79, 35-44. https://doi.org/10.1016/j.partic.2022.10.012

Preparation of HNS microspheres by rapid membrane emulsification

Hongbiao Huo ^a, Baoyun Ye ^{a b}, Yuhuai Shi ^a, Chenhe Feng ^a, Jiechao Wang ^a, Minjie Li ^a, Jiake Fan ^c, Lianqiang Li ^d, Jingyu Wang ^{a b}, Chongwei An ^{a b *}

a School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
b Shanxi Engineering Technology Research Center for Ultrafine Powder, North University of China, Taiyuan, 030051, China
c School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
d Institute of Occupational Health of Ordnance Industry, Xi'an, 710065, China

10.1016/j.partic.2022.10.012

Volume 79, August 2023, Pages 35-44

Received 28 July 2022, Revised 2 October 2022, Accepted 17 October 2022, Available online 4 November 2022, Version of Record 24 January 2023.

E-mail: anchongwei@yeah.net

Highlights

• A reference method for preparation of HNS microspheres is provided.

• The method is simple and beneficial to improve reproducibility of microsphere preparation.

• Fluidity of microspheres prepared by rapid membrane emulsification is significantly improved.

Abstract

In order to improve the dispersibility and loading efficiency of 2,2′,4,4′,6,6′-hexanitrostilbene (HNS), HNS microspheres were prepared by rapid membrane emulsification method with nitrocellulose (NC) as binder. The effects of NC solution concentration, stirring speed and polyvinyl alcohol (PVA) solution concentration on microspheres were investigated. It was characterized by scanning electron microscope (SEM), X-ray diffractometer (XRD), differential thermal analysis (DTA) and angle of repose analyzer. The results show that the HNS microspheres prepared with 5 wt% NC solution concentration, stirring speed of 100 rpm and 2 wt% PVA solution concentration have better regular morphology, higher sphericity, unchanged crystalline shape, increased activation energy and significantly improved dispersibility compared with the refined HNS. Rapid membrane emulsification has a series of advantages such as green, low cost and easy scale up, which provides a better way to prepare microspheres of energy materials.

Graphical abstract

Keywords

Rapid membrane emulsification; HNS microspheres; Dispersibility

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