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Preparation of HNS microspheres by rapid membrane emulsification
Particuology ( IF 4.1 ) Pub Date : 2022-11-04 , DOI: 10.1016/j.partic.2022.10.012
Hongbiao Huo , Baoyun Ye , Yuhuai Shi , Chenhe Feng , Jiechao Wang , Minjie Li , Jiake Fan , Lianqiang Li , Jingyu Wang , Chongwei An

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.



中文翻译:

快速膜乳化法制备HNS微球

为了提高2,2',4,4',6,6'-六硝基芪(HNS)的分散性和负载效率,以硝酸纤维素(NC)为粘合剂,采用快速膜乳化法制备了HNS微球。研究了NC溶液浓度、搅拌速度和聚乙烯醇(PVA)溶液浓度对微球的影响。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、差热分析(DTA)和休止角分析仪对其进行表征。结果表明,5 wt% NC 溶液浓度、100 rpm 搅拌速度和2 wt% PVA 溶液浓度制备的HNS 微球具有更好的形貌、更高的球形度、不变的晶形、增加的活化能和显着改善的分散性。精制 HNS。

更新日期:2022-11-05
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