Mitigating the fire hazards of epoxy resin (EP) and simultaneously improving mechanical properties have always been a goal pursued by polymeric scientists. Herein, we prepared a lithium-containing hepta-isobutyl-POSS (ibu-T₇-Li-POSS). The chemical structure of ibu-T₇-Li-POSS was well characterized. Just via tuning the ethanol solution concentration, we can obtain zero-dimensional (0D) spherical nanoparticles, two-dimensional (2D) ultrathin mono-layer nanoflakes, three-dimensional (3D) multiple-layered lamellae and hexagonal petal-shaped micron-size crystal based on ibu-T₇-Li-POSS. Regular macroscopic octahedron single crystal of ibu-T₇-Li-POSS was analisized by single crystal X-ray diffraction. The prepared ibu-T₇-Li-POSS was incorporated into EP to improve the mechanical properties and enhance the fire safety. When the ibu-T₇-Li-POSS content was 1 wt%, the flexural strength of EP-1 was enhanced from 81.8 MPa of EP to 110 MPa. The incorporation of ibu-T₇-Li-POSS can apparently decrease the dielectric constant and loss of EP nanocomposites. Moreover, when 5 wt% of ibu-T₇-Li-POSS was incorporated into EP, the reduction of peak of heat release rate (p-HRR), peak of smoke production rate (p-SPR) and peak of CO production rate (p-COP) reached to 34.1%, 38.6% and 40.6%, respectively. Therefore, our findings provide a considerable promotion for the facile preparation of low-dimensional environment-friendly nano-/micron-flame retardants based on metal-containing polyhedral oligomeric silsesquioxane (M-POSS) compounds.

减轻环氧树脂 (EP) 的火灾危害并同时提高机械性能一直是聚合物科学家追求的目标。在此，我们制备了一种含锂的七异丁基-POSS（ibu-T ₇ -Li-POSS）。ibu-T ₇ -Li-POSS的化学结构得到了很好的表征。只需通过调节乙醇溶液浓度，我们就可以获得零维（0D）球形纳米粒子、二维（2D）超薄单层纳米薄片、三维（3D）多层薄片和六边形花瓣状微米级基于 ibu-T ₇ -Li-POSS 的晶体。通过单晶X射线衍射分析了ibu-T ₇ -Li-POSS的规则宏观八面体单晶。准备好的 ibu-T ₇-将Li-POSS加入EP以改善机械性能并增强防火安全性。当ibu-T ₇ -Li-POSS 含量为1 wt% 时，EP-1 的抗弯强度从EP 的81.8 MPa 提高到110 MPa。ibu-T ₇ -Li-POSS的加入可以明显降低EP纳米复合材料的介电常数和损耗。此外，当 5 wt% ibu-T ₇-Li-POSS加入EP后，放热率峰值(p-HRR)、产烟率峰值(p-SPR)和CO产率峰值(p-COP)降低达34.1%、38.6 % 和 40.6%，分别。因此，我们的研究结果为基于含金属多面体低聚倍半硅氧烷 (M-POSS) 化合物的低维环保纳米/微米阻燃剂的简便制备提供了相当大的推动。