The application of polymer materials has provided the convenience and also bring fire risk and hazard due to intrinsic flammable property of polymers. Here we demonstrate a novel strategy using boron-doped copper phenylphosphate (BCuPP) nanosheets with temperature-response characteristics as only flame retardant for creating high fire-safety polycarbonate (PC) nanocomposites with excellent comprehensive performances. PC/BCuPP nanocomposites presents a good mechanical performance at room temperature due to the strong interfacial interaction between PC matrix and BCuPP nanosheets. Furthermore, BCuPP exhibits unique temperature-response behavior driven by fire, where fully molten boron oxide flows freely, followed by in-situ formed BPO₄ to repair the defects to form a complete and continuous protective layer. So the temperature-response behavior endows PC/BCuPP nanocomposites excellent fire-safety performance with dramatical decrease in both heat release rate and total smoke production. This study offers a novel route only incorporating nanoparticles as flame retardant to create high fire-safety polymer nanocomposites.

高分子材料的应用在给人们带来便利的同时，也由于高分子本身的易燃特性带来了火灾风险和危害。在这里，我们展示了一种新颖的策略，使用具有温度响应特性的硼掺杂苯基磷酸铜（BCuPP）纳米片作为唯一的阻燃剂，来制造具有优异综合性能的高防火安全性聚碳酸酯（PC）纳米复合材料。由于 PC 基体和 BCuPP 纳米片之间强烈的界面相互作用，PC/BCuPP 纳米复合材料在室温下表现出良好的机械性能。此外，BCuPP 表现出独特的由火驱动的温度响应行为，其中完全熔融的氧化硼自由流动，然后原位形成 BPO ₄修复缺陷，形成完整、连续的保护层。因此，温度响应行为赋予 PC/BCuPP 纳米复合材料优异的防火安全性能，热释放速率和总烟雾产生量均显着降低。这项研究提供了一种仅采用纳米颗粒作为阻燃剂来制造高防火安全聚合物纳米复合材料的新途径。