Graphene oxide (GO) with outstanding mechanical properties and high temperature stability is attractive to many researchers. As a flame retardant, GO also has been widely used in fire resistance applications of polymers. Herein, to explore ignition resistance effect of GO on nanothermite, GO/Al/MnO₂ nanocomposites were prepared. Due to the large specific surface area, GO can completely cover the surface of nanothermite components. Thermal results showed that exothermic thermite reaction occurred in the range of 500 °C to 600 °C while with GO addition, thermite reaction did not happen at all. Originally, combustion phenomenon of Al/MnO₂ nanothermite was intense with bright flame, but GO/Al/MnO₂ nanocomposites cannot be ignited even if the current on heating wires was higher. The physical barrier of GO hinders the direct contact between fuel and oxidizer which prevents the occurrence of self-propagating thermite reaction. This work provides guiding significance to the design of nanothermite flame retardant.

具有杰出的机械性能和高温稳定性的氧化石墨烯（GO）对许多研究人员具有吸引力。GO作为阻燃剂，也已广泛用于聚合物的耐火应用。在此，为了研究GO对纳米热矿的阻燃性，制备了GO / Al / MnO ₂纳米复合材料。由于比表面积大，GO可以完全覆盖纳米热组分的表面。热学结果表明，放热的铝热反应发生在500°C至600°C的范围内，而添加GO则完全不发生铝热反应。最初，Al / MnO ₂纳米铝热剂的燃烧现象在明亮的火焰下强烈，但是GO / Al / MnO ₂即使加热丝上的电流较高，也无法点燃纳米复合材料。GO的物理屏障阻碍了燃料与氧化剂之间的直接接触，从而阻止了自蔓延铝热剂反应的发生。这项工作为纳米热阻燃剂的设计提供了指导意义。