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- Title
喷雾干燥法制备NTO/F2314微球及性能表征.
- Authors
武文瑜; 韩元淇; 李小东; 刘慧敏
- Abstract
To control the morphology and coating effect of the NTO-based polymeric binder explosives, the NTO/F2314 composite microspheres were prepared by spray drying method using the refined NTO as the base explosive and the vinylidene fluoride and trifluorochloroethylene copolymer(F2314)as the capping agent. The influence of the process condition, such as inlet temperature, inlet gas flow rate, feed rate, and solid content of feed liquid, on the morphology of NTO/F2314 microspheres during the spray drying process were investigated. The macroscopic morphology was characterized by scanning electron microscopy(SEM), the microsphere structure was investigated by X-ray photoelectron spectroscopy(XPS)and Raman spectroscopy, and the thermal decomposition performances were analyzed by differential scanning calorimetry(DSC). The results show that the optimal conditions for preparing the NTO/F2314 microspheres are as follows: inlet temperature of 80℃, inlet flow rate of 414L/h, feed rate of 4.5mL/min, and solid content of 2% of the feed liquid. The NTO/F2314 composite microspheres with rounded morphology, dense particles, and good coating effect were obtained by this process. The apparent activation energy of thermal decomposition of the NTO/F2314 composite microspheres is 285.43kJ/mol, 16% higher than that of refined NTO. It remarkably improved the thermal stability of NTO.
- Subjects
X-ray photoelectron spectroscopy; SPRAY drying; DIFFERENTIAL scanning calorimetry; DIFLUOROETHYLENE; GAS flow; FERROELECTRIC polymers; POLYVINYLIDENE fluoride; MICROSPHERES
- Publication
Chinese Journal of Explosives & Propellants, 2023, Vol 46, Issue 7, p617
- ISSN
1007-7812
- Publication type
Article
- DOI
10.14077/j.issn.1007-7812.202210012