High-performance MXene-based polymer nanocomposites are highly desirable for diverse industry applications due to their exceptional mechanical, thermal and other properties. Nevertheless, it remains an intractable challenge to create flame retardant polymer/MXene nanocomposites due to the difficulty to achieve uniform dispersion of MXenes. Here, we reported a facile strategy for the surface manipulation of two-dimensional titanium carbide nanosheets (Ti₃C₂T_x) with 3-aminopropylheptaisobutyl-polyhedral oligomeric silsesquioxane (AP-POSS) (POSS-Ti₃C₂T_x) through electrostatic interactions. The POSS-Ti₃C₂T_x is steadily dispersed in many polar solvents. Upon incorporated into polystyrene (PS), the combined effect of AP-POSS and MXene makes the resultant PS nanocomposites exhibit significantly improved thermal and thermoxidative stability, e.g. 22 °C and 39 °C increases in the temperature at 5 wt% mass loss under nitrogen and air, respectively. Meanwhile, a 39.1% reduction in the peak heat release rate, a respective 54.4% and 35.6% reduction in the peak CO production rate and the peak CO₂ production rate was achieved, which are superior to those of its own and previous counterparts. This outstanding fire safety is attributed to the combination of adsorption, catalytic and barrier effects of POSS-Ti₃C₂T_x. Hence, as-designed functionalized MXenes can be effectively applied in PS to formulate multifunctional polymer nanocomposites attractive for wide potential applications.

高性能基于MXene的聚合物纳米复合材料因其出色的机械，热和其他性能而非常适合各种行业应用。然而，由于难以实现MXene的均匀分散，因此制备阻燃聚合物/ MXene纳米复合材料仍然是棘手的挑战。在这里，我们报告了一种通过3-氨基丙基庚异丁基-多面体低聚倍半硅氧烷（AP-POSS）（POSS-Ti ₃ C ₂ T _x）通过二维表面处理二维碳化钛纳米片（Ti ₃ C ₂ T _x）的简便策略。静电相互作用。POSS-Ti ₃ C ₂ T _x稳定地分散在许多极性溶剂中。掺入聚苯乙烯（PS）后，AP-POSS和MXene的共同作用使所得的PS纳米复合材料表现出显着改善的热和热氧化稳定性，例如在氮气下质量损失为5 wt％时温度升高22°C和39°C和空气。同时，峰值放热率降低了39.1％，峰值CO产生率和峰值CO ₂产生率分别降低了54.4％和35.6％，这优于其自身和以前的同类产品。出色的防火性能归因于POSS-Ti ₃ C ₂ T _x的吸附，催化和阻隔作用的结合。因此，设计好的官能化MXene可以有效地应用于PS中，以配制对广泛的潜在应用具有吸引力的多功能聚合物纳米复合材料。