溶胶凝胶法制备RDX/RF纳米复合含能材料

Preparation of RDX/Resorcinol-formaldehyde(RF) Nano-composite Energetic Materials by Sol-Gel Method

以间苯二酚和甲醛为原料,Na2CO3.10H2O为催化剂,采用溶胶凝胶法,通过RDX在间苯二酚-甲醛树脂(RF)形成的纳米网格中结晶,制备了RDX/RF纳米复合含能材料。用原子力显微镜(AFM),扫描电子显微镜(SEM),X射线粉末衍射仪(XRD),BET比表面积分析仪对其结构进行了表征。结果表明,RF凝胶网格尺寸在几个纳米到几十个纳米之间,RDX/RF凝胶中的RDX晶粒大小平均为38 nm。空白RF气凝胶的比表面积达551.5 m2.g-1,炸药填充后样品比表面积为142.7 m2.g-1。与同组分的机械混合物相比,RDX/RF复合物的热分解峰提前约25℃,机械感度有所降低。

Nano-composite energetic materials, hexahydro-1, 3,5-trinitro-i, 3,5-triazine/resorcinol-formaldehyde （ RDX/RF ） aerogel ,was prepared by crystallization of RDX in the N,N-dimethyllformamide （DMF） within the nano-dimensional pores of resorcinolformaldehyde （RF） gel matrix. The structures of RDX/RF aerogel were characterized by atomic force microscopy （ AFM ） , scanning electron microscopy （SEM） ,X-ray powder diffraction （XRD） ,and BET method, Experimental results show that the grid size formed by RF ranges from several to several decade nm and the mean size of nano-RDX in RDX/RF is 38 nrn. The specific surface area for RF aerogel is 551.5 m^2· g^-1 ,and for RDX/RF aerogel is 142, 7 m^2· g^-1, Compared to the corresponding values of the mechanical mixtures with the same components,the exothermic peak of RDX/RF aerogel moves down about 25℃ ,and the mechanical sensitivity decreases a little.