Herein, Ti₃C₂T_x (MXene) was synthesized and mixed with polyvinyl alcohol (PVA) to fabricate PVA/MXene nanocomposites. The results confirmed that delaminated MXene was successfully synthesized. The nanocomposites were obtained via casting/evaporation method. The thermal stability was evaluated by thermogravimetric analysis (TGA). For the PVA composites with content of 2 wt% MXene (PVA‐MXene2), the thermal decomposition was retarded by approximately 20°C when the temperature was lower than 350°C compared with that of pure PVA. Moreover, the evolved gas products of the PVA/MXene composite were lower than those of pure PVA. For the first time, the flame retardancy of PVA/MXene nanocomposite was investigated using a microscale combustion calorimeter. The peak heat release rate (PHRR) and total heat release of the PVA composite were reduced by 25.7% and 25.5%, respectively, with 1 wt% of MXene. The temperatures at PHRR of PVA/MXene composites were improved with the addition of MXene. Moreover, the addition of MXene resulted in PVA composites with a higher tensile strength and elongation at break than those of a pure PVA film. The improvements in the flame retardancy, thermal and mechanical properties of PVA/MXene composites should enable a wide range of potential applications of MXenes in polymer matrices.

中文翻译：

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分层Ti3C2Tx（MXene）增强的聚乙烯醇纳米复合材料的易燃性，热稳定性和机械性能

在此，Ti ₃ C ₂ T _x合成（MXene）并与聚乙烯醇（PVA）混合以制备PVA / MXene纳米复合材料。结果证实分层的MXene已成功合成。通过流延/蒸发方法获得纳米复合材料。通过热重分析（TGA）评估热稳定性。对于含量为2 wt％MXene（PVA-MXene2）的PVA复合材料，当温度低于350°C时，与纯PVA相比，热分解被延迟了大约20°C。而且，PVA / MXene复合物的逸出气体产物低于纯PVA的逸出气体产物。首次使用微型燃烧量热仪研究了PVA / MXene纳米复合材料的阻燃性。PVA复合材料的峰值放热率（PHRR）和总放热分别降低了25.7％和25.5％，分别含有1 wt％的MXene。添加MXene可以提高PVA / MXene复合材料的PHRR温度。此外，MXene的添加导致PVA复合材料具有比纯PVA膜更高的拉伸强度和断裂伸长率。PVA / MXene复合材料的阻燃性，热性能和机械性能的改善将使MXenes在聚合物基质中的广泛潜在应用成为可能。