Direct Deposit Laminate Nanocomposites with Enhanced Propellent Properties
Direct Deposit Laminate Nanocomposites with Enhanced Propellent Properties
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DOI：
10.1021/acsami.5b00891
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发表时间：
2015-05-06
影响因子：
9.5
通讯作者：
Zachariah, Michael R.
中科院分区：
文献类型：
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作者：
Li, Xiangyu;Guerieri, Philip;Zachariah, Michael R.
在聚合物基质中使用含能纳米颗粒用于推进剂应用的挑战之一是在保持机械完整性和反应性的同时获得高颗粒装载量(高能量密度)。在这项研究中，我们探索了一种利用层合结构的新策略。在聚偏氟乙烯(PVDF)反应粘结剂中，采用电喷雾逐层沉积法制备了纳米铝(Al-NPs)/纳米氧化铜(CuO-NPs)铝热剂与聚偏氟乙烯(PVDF)间隔层的复合层。结果表明，含60wt%Al-NPs/CuO-NPs铝热剂的沉积层均匀，机械性能较好。在相同材料组成的情况下，层压板的反应性能和力学性能均明显优于单层结构。这些结果表明，部署多层叠层结构能够结合高负载的含能材料，并且在某些情况下，比相应的均质结构提高了反应性能。这些结果表明，添加制造方法在开发先进推进系统的定制结构方面可能会产生显著的优势。
One of the challenges in the use of energetic nanoparticles within a polymer matrix for propellant applications is obtaining high particle loading (high energy density) while maintaining mechanical integrity and reactivity. In this study, we explore a new strategy that utilizes laminate structures. Here, a laminate of alternating layers of aluminum nanoparticle (Al-NPs)/copper oxide nanoparticle (CuO-NPs) thermites in a polyvinylidene fluoride (PVDF) reactive binder, with a spacer layer of PVDF was fabricated by a electrospray layer-by-layer deposition method. The deposited layers containing up to 60 wt % Al-NPs/CuO-NPs thermite are found to be uniform and mechanically flexible. Both the reactive and mechanical properties of laminate significantly outperformed the single-layer structure with the same material composition. These results suggest that deploying a multilayer laminate structure enables the incorporation of high loadings of energetic materials and, in some cases, enhances the reactive properties over the corresponding homogeneous structure. These results imply that an additive manufacturing approach may yield significant advantages in developing a tailored architecture for advanced propulsion systems.