摘要
为改善3-硝基-1,2,4-三唑-5-酮(NTO)的形貌及减小粒径,以丙酮为溶剂,采用喷雾干燥技术制备得到细化NTO产品,研究了入口温度,进气流量,进料速率,前驱液质量浓度对细化NTO形貌及粒径的影响,筛选出最佳的喷雾干燥工艺参数;利用扫描电镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)和同步热分析仪(TG-DSC)对细化NTO产品的表面形貌、分子结构及热稳定性进行了表征与测试。结果表明,在入口温度为60℃,进气流量为357 L·h^(-1),进料速率为3 mL·min^(-1),NTO前驱液浓度为16.57 mg·mL^(-1)时,可获得形貌效果好、晶体结构稳定、粒径分布范围较窄且平均粒径为1.2μm的类球形NTO;与原料相比,细化NTO的热分解表观活化能提升了41.7 kJ·mol^(-1),热爆炸临界温度提高了10.4℃,具有更优的热稳定性。
Refined 3-nitro-1,2,4-triazol-5-one(NTO)product were prepared by spray drying technology to improve the mor-phology and reduce the particle size.Acetone was used as the experimental solvent.The effects to inlet temperature,inlet flow rate,feed rate and precursor mass concentration on the morphology and particle size of the refined NTO were investigated,and the optimal spray drying process parameters was selected.The surface morphology,molecular structure and thermal stability of refined NTO products were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and fourier trans-form infrared spectroscopy(FT-IR),and synchronous thermal analyzer(TG-DSC).The results show that the sphere-like NTO with good morphological,stable crystal structure,narrow particle size distribution range and an average particle size of 1.2μm can be obtained when the inlet temperature is 60℃,the inlet gas flow rate is 357 L·h^(-1),the feed rate is 3 mL·min^(-1),the NTO precursor concentration is 16.57 mg·mL^(-1).Compared with the feedstock,the thermal decomposition activation energy of the re-fined NTO was enhanced by 41.7 kJ·mol^(-1),and the thermal explosion critical temperature was increased by 10.4℃,which has better thermal stability.
作者
武文瑜
刘一帆
李小东
周阳阳
徐璐
范董倩
蒋起聪
WU Wen-yu;LIU Yi-fan;LI Xiao-dong;ZHOU Yang-yang;XU Lu;FAN Dong-qian;JIANG Qi-cong(School of Environmental and Safety Engineering,North University of China,Taiyuan 030051,China;Shanxi Engineering Technology Research Center for Ultrafine Powder,North University of China,Taiyuan 030051,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2023年第7期635-644,共10页
Chinese Journal of Energetic Materials
基金
山西省研究生教育创新项目资助(2022Y652)。
