An abundance of early warning graphene-based nano-materials and sensors have been developed to avoid and prevent the critical fire risk of combustible materials. However, there are still some limitations that should be addressed, such as the black color, high-cost and single fire warning response of graphene-based fire warning materials. Herein, we report an unexpected montmorillonite (MMT)-based intelligent fire warning materials that have excellent fire cyclic warning performance and reliable flame retardancy. Combining phenyltriethoxysilane (PTES) molecules, poly(p-phenylene benzobisoxazole) nanofiber (PBONF), and layers of MMT to form a silane crosslinked 3D nanonetwork system, the homologous PTES decorated MMT-PBONF nanocomposites are designed and fabricated via a sol–gel process and low temperature self-assembly method. The optimized nanocomposite paper shows good mechanical flexibility (good recovery after kneading or bending process), high tensile strength of ∼81 MPa and good water resistance. Furthermore, the nanocomposite paper exhibits high-temperature flame resistance (almost unchanged structure and size after 120 s combustion), sensitive flame alarm response (∼0.3 s response once exposure onto a flame), cyclic fire warning performance (>40 cycles), and adaptability to complex fire situations (several fire attack and evacuation scenarios), showing promising applications for monitoring the critical fire risk of combustible materials. Therefore, this work paves a rational way for design and fabrication of MMT-based smart fire warning materials that combine excellent flame shielding and sensitive fire alarm functions.

已经开发出大量基于石墨烯的预警纳米材料和传感器，以避免和预防可燃材料的严重火灾风险。然而，石墨烯基火灾预警材料仍存在颜色黑色、成本高、火灾预警响应单一等局限性需要解决。在此，我们报告了一种意想不到的基于蒙脱石 (MMT) 的智能火灾预警材料，该材料具有出色的火灾循环预警性能和可靠的阻燃性。结合苯基三乙氧基硅烷 (PTES) 分子、聚（对亚苯基苯并双恶唑）纳米纤维 (PBONF) 和 MMT 层形成硅烷交联的 3D 纳米网络系统，通过溶胶-凝胶工艺设计和制造同源 PTES 装饰的 MMT-PBONF 纳米复合材料和低温自组装方法。优化后的纳米复合纸具有良好的机械柔韧性（捏合或弯曲过程后恢复良好）、~81 MPa 的高拉伸强度和良好的耐水性。此外，纳米复合纸表现出耐高温阻燃性（燃烧 120 秒后结构和尺寸几乎不变）、灵敏的火焰警报响应（一旦暴露在火焰中响应约 0.3 秒）、循环火警性能（>40 次循环）和对复杂火灾情况（多次火灾袭击和疏散场景）的适应性，在监测可燃材料的临界火灾风险方面显示出有前景的应用。因此，这项工作为设计和制造基于 MMT 的智能火灾预警材料铺平了道路，该材料结合了出色的火焰屏蔽和灵敏的火灾报警功能。