A novel zeolitic imidazolate framework (ZIF‐8) nanoparticles@polyphosphazene (PZN) core‐shell architecture was synthesized, and then, ZIF‐8@PZN and ammonium polyphosphate (APP) were applied for increasing the flame retardancy and mechanical property of epoxy resin (EP) through a cooperative effect. Herein, ZIF‐8 was used as the core; the shell of PZN was coated to ZIF‐8 nanoparticles via a polycondensation method. The well‐designed ZIF‐8@PZN displayed superior fire retardancy and smoke suppression effect. The synthesized ZIF‐8@PZN observably raised the flame retardancy of EP composites, which could be demonstrated by thermogravimetric analysis (TGA) and a cone calorimeter test (CCT). The chemical structure of ZIF‐8@PZN was characterized by X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Compared with pure epoxy, with the incorporation of 3 wt% ZIF‐8@PZN and 18 wt% APP into the EP, along with 80.8%, 72.6%, and 64.7% decreased in the peak heat release rate (pHRR), the peak smoke production rate (pSPR), and the peak CO production rate (pCOPR), respectively. These suggested that ZIF‐8@PZN and APP generated an intumescent char layer, and ZIF‐8@PZN can strengthen the char layer, resulting in the enhancement in the flame resistance of EP.

中文翻译：

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ZIF-8 @聚磷腈核壳结构的制备及其在阻燃环氧树脂中与多磷酸铵的有效协同作用

合成了一种新型的沸石咪唑酸酯骨架（ZIF-8）纳米粒子@聚磷腈（PZN）核-壳结构，然后，将ZIF-8 @ PZN和聚磷酸铵（APP）用于提高环氧树脂的阻燃性和机械性能（EP）的协同作用。在这里，ZIF-8被用作核心。通过缩聚法将PZN的外壳涂到ZIF-8纳米颗粒上。精心设计的ZIF-8 @ PZN具有出色的阻燃性和抑烟效果。合成的ZIF-8 @ PZN可以显着提高EP复合材料的阻燃性，这可以通过热重分析（TGA）和锥形量热试验（CCT）来证明。ZIF-8 @ PZN的化学结构通过X射线衍射（XRD），X射线光电子能谱（XPS）和透射电子显微镜（TEM）进行表征。与纯环氧树脂相比，在EP中掺入3 wt％的ZIF-8 @ PZN和18 wt％的APP，峰值放热率（pHRR）降低了80.8％，72.6％和64.7％。烟雾产生率（pSPR）和峰值CO产生率（pCOPR）。这些表明ZIF-8 @ PZN和APP生成了膨胀的炭层，而ZIF-8 @ PZN可以增强炭层，从而提高了EP的阻燃性。