▎ 摘　　要

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 pre-pared. 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 degrees C to 600 degrees C while with GO addition, thermite reaction did not happen at all. Originally, combustion phenomenon of Al/MnO2 na-nothermite 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 sig-nificance to the design of nanothermite flame retardant.