The flammability of nylon/cotton blend fabrics poses a great potential to cause fire hazard. A bio-based boron contained flame retardant (PBN) in this work was obtained, and then was applied in association with phytic acids to nylon/cotton blend fabrics using a facile dipping and nipping method. The flame retardancy of the fabric was improved significantly with reduced phosphorus content at the presence of PBN. The LOI of the PBN treated blend fabric was 30.1%, and the peak heat release rate (pHRR) and total smoke production (TSP) were decreased by 46.0% and 71.8% compared with that of control blend fabric in the cone calorimeter test. The analysis of the char residue proved the polyphosphoric acids in the flame retardant accelerated the formation of the char, while the ceramic boron structure remained in the char to stabilize the char layer. Moreover, it was suggested that the release of inert gases, such as NH₃ and H₂O diluted the combustible volatiles in the gas phase. This work proposes a possibility for the production of bio-based nylon/cotton blend fabrics with flame retardancy.

尼龙/棉混纺织物的可燃性极有可能引发火灾。在这项工作中获得了一种生物基含硼阻燃剂 (PBN)，然后使用简便的浸渍和夹压法将其与植酸一起应用于尼龙/棉混纺织物。在 PBN 的存在下，织物的阻燃性随着磷含量的降低而显着提高。PBN处理的混纺织物的LOI为30.1%，与锥体中的对照混纺织物相比，峰值放热率（pHRR）和总发烟量（TSP）分别降低了46.0%和71.8%热量计测试。对焦炭残留物的分析证明，阻燃剂中的多磷酸加速了焦炭的形成，而陶瓷硼结构保留在焦炭中以稳定焦炭层。此外，有人认为惰性气体如NH ₃和H ₂ O的释放稀释了气相中的可燃挥发物。这项工作为生产具有阻燃性的生物基尼龙/棉混纺织物提供了可能性。