ABSTRACT

In this study, a novel nitrated bacterial cellulose/2,4,6,8,10,12-Hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane/ammonium perchlorate nanoenergetic composite was successfully prepared by the sol–gel method and the freeze-drying technology. The structure and composition were characterised by means of scanning electron microscope, X-ray diffractometer and Fourier-transform infrared. The results demonstrated that the structure of the gel nanoparticles was granted with unique network cross-linked porous, wherein the hexaazaisowurtzitane and ammonium perchlorate nanoparticles were embedded and dispersed uniformly in the gel matrix. The thermal decomposition properties of composites were analysed by differential scanning calorimeter-thermogravimetric analysis, and the results revealed that the composites exhibited only two exothermal peaks which correspond to the nitrated bacterial cellulose/hexaazaisowurtzitane and ammonium perchlorate. In addition, the impact and friction sensitivities of composites were also performed and showed outstanding safety performance. Hence, this preparation strategy of nitrated bacterial cellulose-based nanocomposite energetic materials may provide promising application in high-performance and low-sensitivity propellants.

摘要

本研究采用溶胶-凝胶法成功制备了一种新型硝化细菌纤维素/2,4,6,8,10,12-Hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane/高氯酸铵纳米能量复合材料。方法和冷冻干燥技术。采用扫描电子显微镜、X射线衍射仪和傅里叶变换红外对结构和组成进行了表征。结果表明，凝胶纳米粒子的结构具有独特的网络交联多孔结构，其中六氮杂异维茨烷和高氯酸铵纳米粒子均匀地嵌入并分散在凝胶基质中。采用差示扫描量热-热重分析法分析复合材料的热分解性能，结果表明，复合材料仅表现出两个放热峰，分别对应于硝化细菌纤维素/六氮杂异维他烷和高氯酸铵。此外，还对复合材料的冲击和摩擦敏感性进行了测试，并表现出出色的安全性能。因此，这种硝化细菌纤维素基纳米复合含能材料的制备策略可能会在高性能和低灵敏度推进剂中提供有希望的应用。