Synergistic effect is an effective strategy for improving the flame retardancy of epoxy resin (EP). In this work, a novel graphene oxide–cobalt nickel phosphate (GO-NiCoPO₃) is successfully synthesized, which is incorporated into an EP matrix for preparing EP/GO-NiCoPO₃ nanocomposites. The results show that the limiting oxygen index value of EP/4GO-NiCoPO₃ nanocomposites is as high as 30.3%, and UL-94 can reach V-1 rating. The results of micro-combustion calorimetry indicate that the total heat release value and peak of heat release rate of EP/8GO-NiCoPO₃ nanocomposites are decreased by 41.9 and 23.8% compared with those of pure EP. This is mainly due to the synergistic barrier effect of GO and NiCoPO₃, which together have their own advantages. Meanwhile, EP/GO-NiCoPO₃ nanocomposites can form a dense char layer during the burning process and improve the thermal stability of EP/GO-NiCoPO₃ nanocomposites.

协同效应是提高环氧树脂（EP）阻燃性的有效策略。在这项工作中，成功地合成了一种新型的氧化石墨烯-磷酸钴镍（GO-NiCoPO ₃），将其掺入EP基体中以制备EP / GO-NiCoPO ₃纳米复合材料。结果表明，EP / 4GO-NiCoPO ₃纳米复合材料的极限氧指数值高达30.3％，UL-94可以达到V-1等级。微燃烧量热法的结果表明，与纯EP相比，EP / 8GO-NiCoPO ₃纳米复合材料的总放热值和放热率峰值分别降低了41.9％和23.8％。这主要是由于GO和NiCoPO ₃的协同屏障作用，它们共同具有各自的优势。同时，EP / GO-NiCoPO ₃纳米复合材料可在燃烧过程中形成致密的炭层，并提高EP / GO-NiCoPO ₃纳米复合材料的热稳定性。