Aiming at improving fire retardancy of epoxy resin (EP), the thermal-exfoliated boron nitride nanosheets (BN) underwent the bio-inspired polydopamine (PDA) nano-coating and in-situ interfacial growth of iron-derived nanocatalyst (Fe) to prepare nanohybrid ([email protected]@Fe). The design complied with principles: 1) PDA promoted the dispersion of BN in EP matrix and offered active sites for functionalization 2) bio-stabilized iron-derived nanoparticles catalyzed the polyaromatic reaction towards higher quality. Resultantly, 6 wt% [email protected]@Fe increased limiting oxygen index (LOI) of EP by 10.0% and suppressed fire spread in UL-94 test. The peak heat release rate (pHRR) was reduced by 38.9% with notably suppressed CO and smoke production. Ignition time, as a key aspect of fire safety, was effectively delayed due to enhanced thermal conductivity of BN-based EP nanocomposites. The optimization of char structure due to the interfacial charring accounted for the improved fire retardancy. In perspective, the bio-inspired engineering of BN offered a viable approach to improving fire safety of polymers.

为了提高环氧树脂（EP）的阻燃性，对热剥离氮化硼纳米片（BN）进行了生物启发的聚多巴胺（PDA）纳米涂层和原位成型铁衍生的纳米催化剂（Fe）的界面生长以制备纳米杂化物（[电子邮件保护] @Fe）。该设计符合原理：1）PDA促进BN在EP基质中的分散，并为官能化提供了活性位点。2）生物稳定的铁衍生的纳米颗粒催化了多芳烃反应朝着更高的质量方向发展。结果，在UL-94测试中，6 wt％[受电子邮件保护] @Fe使EP的极限氧指数（LOI）增加了10.0％，并抑制了火势蔓延。峰值放热率（pHRR）降低了38.9％，同时显着抑制了CO和烟雾的产生。由于增强了BN基EP纳米复合材料的导热性，点火时间作为消防安全的一个关键方面被有效地延迟了。由于界面炭化，炭结构的优化导致了阻燃性的提高。从角度来看，