静电喷雾法制备TKX-50/Al/GAP含能微单元及其性能研究

为了获得钝感和组分均匀的含能微单元,采用静电喷雾法制备了TKX-50/Al/GAP复合微球;采用扫描电镜(SEM)、X射线能谱(EDS)、X-射线衍射仪(XRD)和红外光谱仪(FT-IR)对其形貌结构进行了表征;采用差示扫描量热仪(DSC)测试了热分解性能;采用高速摄影仪测试其点火燃烧性能;根据GB/T 21567-2008、GB/T 21566-2008标准对其感度进行了测试。结果表明,静电喷雾法制备的TKX-50/Al/GAP含能微单元组分分布均匀,为粒径2~3μm的微球;与物理混合法相比,微球的表观分解热提高了860.7J/g,活化能升高了12.07kJ/mol,;静电喷雾法制备的微球点火延迟时间为11ms,燃烧时间为409ms;撞击、摩擦和静电感度与物理混合样品相比,分别降低了83J、80N和0.05J,表明静电喷雾法制备的TKX-50/Al/GAP含能微单元具有良好的安全性能。

Preparation of TKX-50/Al/GAP Energetic Micro-units by Electrostatic Spraying Method and Its Performance

To obtain the energetic micro-units with insensitive and uniform composition,TKX-50/Al/GAP composite microspheres were prepared by an electrostatic spraying method.Scanning electron microscopy(SEM),X-ray energy spectroscopy(EDS),X-ray diffraction(XRD)and infrared spectroscopy(FT-IR)were used to characterize the morphology and structure of the microspheres,and their thermal decomposition performance was investigated by differential scanning calorimeter(DSC).The high-speed camera was also used to study its ignition and combustion performance,and its sensitivity was tested according to the GB/T 21567-2008 and GB/T 21566-2008 standards.The results show that the TKX-50/Al/GAP energetic micro-units prepared by the electrostatic spray method have a uniform distribution of microspheres with a diameter of 2—3μm.Compared to the sample obtained by the physical mixing method,the apparent decomposition heat of the microspheres has increased by 860.7J/g,and the activation energy increased by 12.07kJ/mol.The ignition delay time of the microspheres prepared by electrostatic spraying is 11ms,and the burning time is 409ms.The impact,friction,and electrostatic sensitivities are reduced by 83J,80N and 0.05J,respectively,indicating that the TKX-50/Al/GAP energetic micro-unit prepared by the electrostatic spray method has a good safety performance.