Yu Bin, Yuen Anthony Chun Yin, Xu Xiaodong, Zhang Zhen-Cheng, Yang Wei, Lu Hongdian, Fei Bin, Yeoh Guan Heng, Song Pingan, Wang Hao
Centre for Future Materials, University of Southern Queensland, Toowoomba, QLD, 4350, Australia.
School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
J Hazard Mater. 2021 Jan 5;401:123342. doi: 10.1016/j.jhazmat.2020.123342. Epub 2020 Jul 3.
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 (TiCT) with 3-aminopropylheptaisobutyl-polyhedral oligomeric silsesquioxane (AP-POSS) (POSS-TiCT) through electrostatic interactions. The POSS-TiCT 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 CO 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-TiCT. Hence, as-designed functionalized MXenes can be effectively applied in PS to formulate multifunctional polymer nanocomposites attractive for wide potential applications.
高性能的基于MXene的聚合物纳米复合材料因其优异的机械、热学和其他性能而在各种工业应用中备受青睐。然而，由于难以实现MXenes的均匀分散，制备阻燃聚合物/MXene纳米复合材料仍然是一个棘手的挑战。在此，我们报道了一种通过静电相互作用用3-氨丙基庚基异丁基倍半硅氧烷（AP-POSS）对二维碳化钛纳米片（TiCT）进行表面处理的简便策略（POSS-TiCT）。POSS-TiCT能稳定地分散在许多极性溶剂中。当将其掺入聚苯乙烯（PS）中时，AP-POSS和MXene的联合作用使所得的PS纳米复合材料表现出显著提高的热稳定性和热氧化稳定性，例如在氮气和空气中质量损失5 wt%时的温度分别提高了22℃和39℃。同时，峰值热释放速率降低了39.1%，峰值CO生成速率和峰值CO₂生成速率分别降低了54.4%和35.6%，这优于其自身和之前的同类材料。这种出色的防火安全性归因于POSS-TiCT的吸附、催化和阻隔作用的结合。因此，所设计的功能化MXenes可以有效地应用于PS中，以制备对广泛潜在应用具有吸引力的多功能聚合物纳米复合材料。
