【摘 要】
：
The core-shell 2,4,6,8,10,12-Hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane/2,4,6-Trinitrotoluene (CL-20/TNT) composite was prepared by spray-drying method in which sensitive high energy explosive (CL-20)was coated with insensitive explosive (TNT).The struc
【机 构】
：
School of Environment and Safety Engineering,North University of China,Taiyuan,030051,China
论文部分内容阅读
The core-shell 2,4,6,8,10,12-Hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane/2,4,6-Trinitrotoluene (CL-20/TNT) composite was prepared by spray-drying method in which sensitive high energy explosive (CL-20)was coated with insensitive explosive (TNT).The structure and properties of different formulations of CL-20/TNT composite and CL-20/TNT mixture were characterized by scanning electron microscopy (SEM),Transmission electron microscopy (TEM),Laser particle size analyzer,X-ray photoelectron spectroscopy(XPS),X-ray diffraction (XRD),differential scanning calorimetry (DSC),impact sensitivity test and detonation performance.The results of SEM,TEM,XPS and XRD show that ∈-CL-20 particles are coated by TNT.When the ratio of CL-20/TNT is 75/25,core-shell structure is well formed,and thickness of the shell is about 20-30 nm.And the analysis of heat and impact show that with the increase of TNT content,the TNT coating on the core-shell composite material can not only catalyze the thermal decomposition of core material (CL-20),but also greatly reduce the impact sensitivity.Compared with the CL-20/TNT mixture (75/25) at the same ratio,the characteristic drop height of core-shell CL-20/TNT composite(75/25) increased by 47.6％ and the TNT coating can accelerate the nuclear decomposition in the CL-20/TNT composites.Therefore,the preparation of the core-shell composites can be regarded as a unique means,by which the composites are characterized by controllable decomposition rate,high energy and excellent mechanical sensitivity and could be applied to propellants and other fields.
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