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为扩大液体发射药的使用范围，适应现有武器装备的需要，使液体发射药能应用于现有的各项武器系统中，设计了一种可以用来封装液体发射药的硝化棉基含能空芯球形壳体，以内溶法制备球形发射药为基础，利用双重乳化的原理，使用W/O型Pickering乳化剂活性磷酸钙与O/W型乳化剂羧甲基纤维素钠将含硝化纤维素的乳液乳化成单分散型W/O/W型乳状液，随后蒸发溶剂得到壳体。使用接触角测量仪测量活性磷酸钙三相接触角验证其作为W/O型pickering乳化剂的可行性，使用超景深电子显微系统对其基本形貌和粒径进行表征，使用质量体积法对其堆积密度进行表征。结果表明：活性磷酸钙的三相接触角为121.80°；该壳体内部具有较大的空腔结构，粒径为0.7~1.1 mm，堆积密度为0.1~0.2 g·mL-1，微观上以白色纤维结构为主，且纤维上嵌有白色微粒；羧甲基纤维素钠与活性磷酸钙加入质量比例以1∶1~1.25∶1，且活性磷酸钙与硝化纤维素加入质量比以0.16∶1~0.24∶1为宜。“,”The accommodation of liquid propellant in current‑used weapons and equipment makes it important for expanding its application field in various existing weapon systems in the form of general solid propellant. In the current paper， a nitrocellulose‑based energetic hollow spherical shell that can be used to encapsulate the liquid propellant is designed. The preparation method is based on the spherical propellant prepared by the internal solution method and on the principle of double emulsification， using W/O type Pickering emulsifier active calcium phosphate and O/W type emulsifier sodium carboxymethyl cellulose to make the emulsion containing nitrocellulose emulsify into a monodisperse W/O/W type emulsion， then evaporate the solvent to obtain the shell. The feasibility of activated calcium phosphate on the W/O type emulsifier has been examined through triple contact angle technique using a contact angle meter. Besides， the basic morphology and particle size， as well as packing density have been characterized using a ultra‑depth‑of‑field electron microscopy system and mass‑volume method， respectively. Results show that the three‑phase contact angle of activated calcium phosphate is 121.80°. The shell has a large cavity structure with a particle size of 0.7-1.1 mm and a bulk density of 0.1-0.2 g·mL-1. The microstructure demonstrated a majority of white fiber structure. In addition， embedded white particles in the fiber could also been observed. The optimized ratio of sodium carboxymethyl cellulose to active calcium phosphate， and active calcium phosphate to nitrocellulose should be 1∶1-1.25∶1 and 0.16∶1-0.24∶1， respectively.