| Summary: | 博士 === 國防大學理工學院 === 國防科學研究所 === 103 === Supercritical fluid technology is booming green technology in recent years. The low activity carbon dioxide as a solvent, has some advantages, such as less pollution, no toxicity, no flame, inexpensive, easy to obtain and low temperature operation; and applies to high thermal sensitive substances like explosives. Firstly, in this study, the Octol and Composition B were melting casted in sample bottle, and then the Octol and Composition B could be removed from sample bottle by supercritical carbon dioxide fluid. The removal rate of Octol is 97.2%, Composition B were 99.12% by the three steps. Secondly, the recovered Octol and Composition B are cleaned in acetone, and the HMX and RDX with a littie TNT were dissolved in acetone again, and then the purification process was conducted by supercritical CO2 fluid. The purities of the recovered HMX, RDX and TNT are about 100% which via HPLC analysis. Thirdly, the nano-reticular HMX, nano-particles of HMX and micron particles of RDX could be prepared by supercritical Precipitation with Compressed Fluid (PCA), and then the sensitivity of products prepared were measured by the impact, friction and electrostatic test. The results showed that the nano reticular HMX have good insensitive effect. Finally, the nano-reticular HMX was applied to the delay composition development. The result showed that the performance of the delay time 178.9μs in 25mm of insensitive nano-reticular HMX is good for replacing delay ignition of double type Armor Pierving.
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