The porous skeleton structure of oxidizers can effectively enlarge the contact area with fuels and boost the reactivity of thermites, but the overly complex preparation processes tend to limit their use to some extent. To overcome this issue, water-soluble starch and copper nitrate were used as a template to form a carbon skeleton copper oxide (C-CuO) after spray drying and calcination. By adding nanoaluminum into the spray drying process, the n-Al@C-CuO was prepared and compared with the physically mixed n-Al/C-CuO in the context. Scanning electron microscopy and differential scanning calorimetry were used to observe the morphology and analyze the thermal process. The pressure–time test and the electrostatic sensitivity test were used to measure the energy release properties and the safety of the thermites. Results indicated that the n-Al@C-CuO had 60.97 °C earlier initial exothermic temperature and 1.74 times higher peak pressure than that of the physically mixed sample. The n-Al@C-CuO was not ignited under 25 kV in the electrostatic sensitivity test, showing the great electrostatic safety of the sample. These findings are expected to facilitate the development of spray drying and promote energy release of traditional thermites.

中文翻译：

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低静电敏感性、高反应活性纳米结构Al@CuO活性炭的制备

氧化剂的多孔骨架结构可以有效扩大与燃料的接触面积，提高铝热剂的反应活性，但过于复杂的制备工艺往往在一定程度上限制了其应用。为了克服这个问题，以水溶性淀粉和硝酸铜为模板，经过喷雾干燥和煅烧后形成碳骨架氧化铜（C-CuO）。通过在喷雾干燥过程中添加纳米铝，制备了n-Al@C-CuO，并与本文中的物理混合的n-Al/C-CuO进行了比较。采用扫描电子显微镜和差示扫描量热法观察形貌并分析热过程。采用压力-时间测试和静电敏感性测试来测量铝热剂的能量释放性能和安全性。结果表明，n-Al@C-CuO的初始放热温度比物理混合样品提前60.97℃，峰值压力高1.74倍。 n-Al@C-CuO在静电敏感性测试中在25 kV下未起燃，表明样品具有良好的静电安全性。这些发现有望促进喷雾干燥的发展并促进传统铝热剂的能量释放。