Currently, it is still a challenge to endow polymethyl methacrylate (PMMA) with excellent electroconductivity and fire safety. In this work, we have designed a novel hybrid aiming to achieve the flame resistance and electrical conductive of PMMA by fabricating an ordered structure of the FR-PANI@Fe₃O₄@NC. Employing a magnetic field, the FR-PANI@Fe₃O₄@NC hybrid shows a beneficial configuration structure to reduce the electrical resistivity of 8.9 kΩ·cm⁻¹ for the PMMA composite by controlling the added volume at 20 wt%. Moreover, the PMMA composite exhibits conspicuous fire resistance with an LOI of 27.4% and a V-0 rating in the UL-94 tests. Simultaneously, combined with the regular configuration structure of FR-PANI@Fe₃O₄@NC hybrid, the thermal stability and fire behaviour of the PMMA composite has been improved by the plentiful char residue formation. The flame-retardant mechanism of FR-PANI@Fe₃O₄@NC hybrid in PMMA material has been deduced by TG-IR, FTIR, and SEM, and the results implied that the FR-PANI@Fe₃O₄@NC hybrid containing abundant P-N functional groups generates phosphorus-containing compounds to promote the dehydration reaction of the PMMA matrix in a condensed phase. This is beneficial to improve the flame retardancy of PMMA by the formation of a char layer, providing the shielding effect to prevent the heat transfer and flammable micro-molecules volatilisation process. Hence, the as-exploited FR-PANI@Fe₃O₄@NC hybrid herein is believed to expand the range of applications of PMMA materials in the advanced material field.

目前，赋予聚甲基丙烯酸甲酯（PMMA）优异的导电性和防火安全性仍然是一个挑战。_{在这项工作中，我们设计了一种新型混合材料，旨在通过制造 FR-PANI@Fe 3} O ₄ @NC的有序结构来实现 PMMA 的阻燃性和导电性。采用磁场，FR-PANI@Fe ₃ O _{4 @NC 杂化物显示出一种有益的配置结构，可降低 8.9 kΩ·cm} ^-1的电阻率通过将添加量控制在 20 wt% 来制备 PMMA 复合材料。此外，PMMA 复合材料表现出显着的耐火性，LOI 为 27.4%，在 UL-94 测试中达到 V-0 等级。同时，结合FR-PANI@Fe ₃ O ₄ @NC杂化物的规则构型结构，PMMA复合材料的热稳定性和防火性能因大量炭渣的形成而得到改善。_{通过TG-IR、FTIR和SEM推导了FR-PANI@Fe 3} O ₄ @NC杂化物在PMMA材料中的阻燃机理，结果表明FR-PANI@Fe ₃ O ₄@NC 杂化物含有丰富的 PN 官能团，可生成含磷化合物，以促进 PMMA 基质在凝聚相中的脱水反应。这有利于通过形成炭层来提高PMMA的阻燃性，提供屏蔽作用以防止传热和易燃小分子挥发过程。因此，本文所开发的 FR-PANI@Fe ₃ O ₄ @NC 杂化物被认为扩大了 PMMA 材料在先进材料领域的应用范围。