By using 1,2-epoxypropane as the agent for speeding up the hydrolyzation of Fe(Ⅲ) ions, AND/Fe2O3 composite wet gel was prepared by sol-gel method under a mild and nontoxic condition. Consequently, the AND/ Fe2O3 aerogel was obtained by means of supercritical CO2 fluid extraction. TEM,SEM,EDS,IR,DSC and sensitivity test were employed to characterize the appearance, structure, thermal behaviour and mechanical sensitivity of the samples. The results indicate that the as-prepared AND/Fe2O3 nanoparticles are about 50- 100 nm in diameter. As the decrease of the mass of AND,the nanocomposites become much insensitive to mechanical stimuli. Moreover,the AND/Fe2 O3 nanoparticles decomposes at lower temperature with the disappearance of melting endothermic peak.%采用溶胶-凝胶法,以1,2-环氧丙烷作为Fe(Ⅲ)离子的水解促进剂,在温和无毒的条件下制备了ADN/Fe2O3复合湿凝胶,再将复合湿凝胶进行超临界CO2萃取后,成功获得ADN/Fe2O3气凝胶.用TEM、SEM、EDS、IR DSC和感度试验对上述样品的形貌、结构、热行为和机械感度进行了表征.结果表明,制得的ADN/Fe2O3纳米复合氧化剂的粒径为50～10 nm,撞击感度和摩擦感度均随着其中ADN含量的减小而降低,分解放热峰较原料ADN有所提前,熔化吸热峰消失.
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