In this work, the functionalized form of a highly-conductive, porous, three-dimensional graphene foam (F-GF) was used to enhance the flame speed of a solid propellant, nitrocellulose (NC). The graphene foam (GF) micro-structures, synthesized by the chemical vapor deposition (CVD) technique, were coated with a transition metal oxide (TMO), manganese dioxide (MnO₂), using a hydrothermal approach. Average flame speeds as a function of both the NC-GF and MnO₂NC loadings were studied. Overall, flame speed enhancement up to 9 times that of the bulk NC flame speed was observed. An optimum MnO₂NC loading corresponding to the maximum flame speed was obtained for each NC-GF loading, which was found to shift to the right as the NC-GF loading was decreased. In addition, thermogravimetric (TG) and differential scanning calorimetry (DSC) analysis were also conducted to determine the effect of NC-GF and MnO₂NC loadings on the activation energy (E) and peak thermal decomposition (PTD) temperatures of the propellant NC. Similar to the flame speed results, for each NC-GF loading tested, an initial decrease in both E and PTD temperatures was obtained as a function of the MnO₂NC loading but above a certain MnO₂ concentration, a slight rise and a plateaued behavior was observed, respectively.

在这项工作中，功能化形式的高导电性多孔三维石墨烯泡沫（F-GF）用于提高固体推进剂硝化纤维（NC）的燃烧速度。通过化学气相沉积（CVD）技术合成的石墨烯泡沫（GF）微观结构，使用水热方法涂覆了过渡金属氧化物（TMO），二氧化锰（MnO ₂）。研究了平均火焰速度与NC-GF和MnO₂NC负载的关系。总体而言，观察到火焰速度提高了高达整体NC火焰速度的9倍。最佳MnO₂对于每个NC-GF负载，都获得了与最大火焰速度相对应的NC负载，发现随着NC-GF负载的减少，该负载向右移动。此外，还进行了热重（TG）和差示扫描量热（DSC）分析，以确定NC-GF和MnO ₂ NC负载量对推进剂NC的活化能（E）和峰值热分解（PTD）温度的影响。 。与火焰速度结果相似，对于每个测试的NC-GF负载，E和PTD温度均根据MnO ₂ NC负载而出现初始降低，但高于一定的MnO ₂浓度时，会略有上升并处于平稳状态分别被观察到。