干燥方式对RDX/RF复合含能材料结构性能影响  

Effect of Drying Methods on Structure of RDX/RF Composite Energetic Materials

作　　者：张娟[1] 聂福德[1] 郁卫飞[1] 郭秋霞[1] 曾贵玉[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《含能材料》2009年第1期23-26,共4页Chinese Journal of Energetic Materials

摘　　要：采用超临界干燥方式和冷冻干燥方式制得RDX/RF气凝胶和干凝胶。利用扫描电镜(SEM),BET比表面积分析,X射线粉末衍射(XRD),差示扫描量热法(DSC)对其结构进行了表征。结果表明:超临界干燥方式得到的RDX/RF气凝胶具有典型纳米孔洞结构和高比表面积特性。冷冻干燥导致干凝胶骨架结构坍塌,比表面积显著降低。RDX/RF气凝胶中RDX的平均晶粒度在34～38nm之间,干凝胶中RDX的平均晶粒度在50～100nm之间。RDX/RF气凝胶和干凝胶的热分解峰分别提前了14～25℃和2～7℃。Hexahydro-1,3,5-trinitro-1,3,5-triazine/resorcinol-formaldehyde （ RDX/RF ） aerogel and xerogel were prepared by supercritical fluid drying method and freezing drying method. The structure of RDX/RF composites were characterized by scanning electron microscopy （ SEM ）, BET method, X-ray power diffraction （XRD） and differential scanning calorimetry （ DSC ）. The results show that supercritieal fluid drying method can get RDX/RF aerogel of typical nano-pore structures and high surface areas. Freezing drying destroys the framework of gels and leads to the rapid decreasing of surface areas of gels. The mean crystal size of RDX in RDX/RF aerogels is between 34 -38 nm, and in RDX/RF xerogels is between 50 - 100 nm. The thermal decomposition temperature of RDX/RF aerogels decreases by about 14 -25℃, and of RDX/RF xerogels decreases by about 2 -7 ℃.

关 键 词：有机化学 超临界干燥 冷冻干燥 复合含能材料 溶胶-凝胶法(sol-gel) 

分 类 号：TB383.1[一般工业技术—材料科学与工程]