Abstract Spherical explosives had regular shape and smooth surface, which gave them low sensitivity, excellent flowability, and high bulk density, thereby yield good charging performance. Traditional spherization methods always resulted in irregular shape, low sphericity, and uneven size. In this paper, a novel droplet microfluidic technology was used to fabricate hexanitrostilbene (HNS) microspherical with nitrocellulose (NC) as adhesive. The farication process (e. g., HNS concentration, NC concentration, flow rate) was fully investigated in pursuing for the ideal farication condition. The chemical structures, crystalline structures, and thermal stability of HNS were preserved. Meanwhile, the flowability and bulk density of HNS microspheres were significantly improved (Repose angle: HNS microsphere vs raw HNS, 33.1 vs 39.2°; bulk density: HNS microsphere vs raw HNS, 0.466 vs 0.301 cm−3), which enhanced the charging and pressing performance of HNS.

中文翻译：

---

液滴微流控技术制备微球六硝基二苯乙烯 (HNS)

摘要 球形炸药具有规则的形状和光滑的表面，灵敏度低，流动性好，堆积密度高，因而具有良好的装药性能。传统的球化方法总是导致形状不规则、球度低、尺寸不均匀。在本文中，一种新型的液滴微流体技术用于以硝化纤维素 (NC) 为粘合剂制备六硝基二苯乙烯 (HNS) 微球。充分研究了粉碎过程（例如，HNS 浓度、NC 浓度、流速）以寻求理想的粉碎条件。保留了 HNS 的化学结构、晶体结构和热稳定性。同时，HNS微球的流动性和堆积密度显着提高（休止角：HNS微球与原始HNS，33.1与39.2°；堆积密度：