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响应曲面法对超细RDX制备工艺优化及性能表征

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响应曲面法对超细RDX制备工艺优化及性能表征
Optimization and Characterization of Ultrafine RDX Preparation Process by Response Surface Methodology
投稿时间：2018-12-01
DOI：10.15918/j.tbit1001-0645.2018.s2.027
中文关键词:材料科学黑索今工艺优化性能表征
English Keywords:materials scienceRDXprocess optimizationperformance characterization
基金项目:武器装备军内科研资助项目（61741G956）
作者单位
姬文苏陆军工程大学 军械士官学校, 湖北, 武汉 430075
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中文摘要:
以液态二甲醚（DME）为溶剂，利用超临界快速膨胀法（RESS）制备亚微米级颗粒形态球形沉淀RDX.探讨了提取温度、提取压力、喷嘴内径对RESS过程的影响，基于Box-Behnken响应面法原理对工艺优化，并对产品性能进行了表征.结果发现：3个因素影响力均较为显著，影响力大小依次为喷嘴内径 > 提取压力 > 提取温度；优化参数为提取温度293 K、提取压力15 MPa、喷嘴内径50 μm；RDX产品呈颗粒和球形形貌，亚微米大小，平均粒径为0.183 μm；结晶焓变（ΔH=714.4 J/g）高于原来RDX （ΔH=381.5 J/g），爆炸概率点估计值由76%降为55%.综合来看，新制备的RDX爆炸性能明显改善，猛度增大而感度降低.
English Summary:
Submicron particle morphology spherical precipitation RDX was successfully prepared by supercritical rapid expansion (RESS) with liquid dimethyl ether (DME) as solvent. The effects of extraction temperature, extraction pressure and nozzle inner diameter on the RESS process were discussed. The process was optimized based on the Box-Behnken response surface methodology and the product performance was characterized in the end. Results show that the influence of all three factors is significant, and the inner diameter of the nozzle has the greatest influence, followed by the extraction pressure. The optimization parameters are extraction temperature 293 K, extraction pressure 15 MPa, and nozzle inner diameter 50 μm. RDX products show particle and spherical morphology, with sub-micron size and average particle size of 0.183 μm. The crystal enthalpy change (ΔH=714.4 J/g) is higher than that of the original RDX (ΔH=381.5 J/g), and the estimated explosion probability decreases from 76% to 55%. On the whole, the explosion performance of the newly prepared RDX is obviously improved, the violence increases and the sensitivity decreases.
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