硝酸纤维素在不同氧化剂的三元纳米铝热剂存在下的热分解行为及动力学研究

Slimane Bekhouche , Djalal Trache , Hamdane Akbi , Amir Abdelaziz , Ahmed Fouzi Tarchoun , Hassane Boudouh
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引用次数: 3

摘要

纳米隐士最近在军事和民用领域引起了极大的兴趣,因为它们能够通过氧化还原反应点燃或爆炸并释放大量热量。在本研究中,通过捕集反应研磨技术制备了三种三元纳米铝热剂,它们含有MgAl合金作为燃料,不同的金属氧化物(MXOY=CuO,NiO,TiO2)作为氧化剂。使用快速溶液干燥技术,将这些亚稳分子间复合材料引入硝化纤维素(NC)中,以评估其催化行为。通过扫描电子显微镜(SEM)、能谱仪(EDS)、粉末X射线衍射仪(XRD)和差示扫描量热仪(DSC)对所获得的含能复合材料,即NC/MgAl-MXOY进行了仔细观察。还测定了NC/MgAl-MXOY复合膜的点火延迟时间,结果表明,与纯NC相比,纳米铝热剂的引入通过其值的降低而产生了积极影响,还评估了与所获得的NC/MgAl-MXOY含能复合材料膜的热分解相关的Arrhenius参数。研究结果表明,纳米铝热剂组分中氧化剂的选择显著影响NC/MgAl-MXOY含能复合材料的分解行为。基于所获得的结果,MgAl-CuO纳米铝热剂提供了比MgAl-NiO和MgAl-TiO2纳米颗粒更好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Thermal decomposition behavior and kinetic study of nitrocellulose in presence of ternary nanothermites with different oxidizers

Thermal decomposition behavior and kinetic study of nitrocellulose in presence of ternary nanothermites with different oxidizers

Nanothermites have recently attracted a great deal of interest in both military and civilian domains owing to their capability of igniting or exploding and releasing a significant quantity of heat via a redox reaction. In this study, three ternary nanothermites, which contain MgAl alloy as fuel and different metal oxides (MXOY = CuO, NiO, TiO2) as oxidizers, were prepared through the arrested reactive milling technique. These metastable intermolecular composites were introduced to nitrocellulose (NC), using a fast solution drying technique, to assess their catalytic behavior. The as-obtained energetic composites, namely, NC/MgAl-MXOY, were scrutinized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), powder X-ray diffraction (XRD), and differential scanning calorimetry (DSC). The ignition delay time of NC/MgAl-MXOY composite films was also determined, and the results revealed the positive effect of the introduction of nanothermite through the decrease of its value compared to pure NC. Using the isoconversional kinetic analysis, the Arrhenius parameters associated with the thermal decomposition of the as-obtained NC/MgAl-MXOY energetic composites films were also evaluated. The findings indicated that the choice of the oxidizer within the nanothermite composition significantly influences the decomposition behavior of the NC/MgAl-MXOY energetic composites. Based on the obtained results, the MgAl-CuO nanothermite provides better performance than MgAl-NiO and MgAl-TiO2 nanoparticles.

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