The fire hazard posed by the inherent flammability and smoke toxicity of flexible polyurethane foam (FPUF) often necessitates the incorporation of flame retardants to meet stringent regulations. The development of environmentally friendly strategies to enhance the fire resistance of FPUF is of increasing importance and a significant amount of research has been devoted to this end. In this work, a bio-based coating was constructed by co-depositing polydopamine and guanosine 5′-monophosphate disodium salt (GMP) to increase the fire safety of FPUF. The coating significantly improved the flame retardancy of FPUF. The FPUF@PDA-GMP samples showed an LOI value of 24.5% with a self-extinguishing effect and exhibited reduced release of heat, smoke, CO, CO₂, and HCN due to their compact and strong char. The compressive strength at 70% strain of FPUF@PDA-GMP was 8 times higher than that of the control FPUF sample. The coating had a little negative effect on the resilience and improved its elongation at break. This investigation has provided a useful method for designing and producing high-performance foams.

软质聚氨酯泡沫 (FPUF) 固有的易燃性和烟雾毒性造成的火灾危险通常需要加入阻燃剂以满足严格的法规。开发提高 FPUF 耐火性的环保策略变得越来越重要，为此已进行了大量研究。在这项工作中，通过共沉积聚多巴胺和鸟苷 5'-单磷酸二钠盐 (GMP) 构建生物基涂层，以提高 FPUF 的防火安全性。该涂层显着提高了FPUF的阻燃性。FPUF@PDA-GMP 样品显示出 24.5% 的 LOI 值，具有自熄效果，并表现出减少的热量、烟雾、CO、CO _2释放, 和 HCN 由于其紧凑和强焦。FPUF@PDA-GMP 在 70% 应变下的抗压强度是对照 FPUF 样品的 8 倍。涂层对回弹性有一点负面影响并提高了断裂伸长率。该研究为设计和生产高性能泡沫提供了一种有用的方法。