Członka Sylwia, Kairytė Agnė, Miedzińska Karolina, Strąkowska Anna, Adamus-Włodarczyk Agnieszka
Faculty of Chemistry, Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland.
Laboratory of Thermal Insulating Materials and Acoustics, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenu St. 28, LT-08217 Vilnius, Lithuania.
Int J Mol Sci. 2021 Apr 3;22(7):3744. doi: 10.3390/ijms22073744.
Rigid polyurethane (PUR) foams reinforced with 1, 2, and 5 wt.% of salvia filler (SO filler) and montmorillonite-modified salvia filler (MMT-modified SO filler) were produced in the following study. The impact of 1, 2, and 5 wt.% of SO filler and MMT-modified SO filler on the morphological, chemical, and mechanical properties of PUR composites were examined. In both cases, the addition of 1 and 2 wt.% of SO fillers resulted in the synthesis of PUR composites with improved physicomechanical properties, while the addition of 5 wt.% of SO fillers resulted in the formation of PUR composites with a less uniform structure and, therefore, some deterioration in their physicomechanical performances. Moreover, the results showed that the modification of SO filler with MMT improved the interphase compatibility between filler surface and PUR matrix. Therefore, such reinforced PUR composites were characterized by a well-developed closed-cell structure and improved mechanical, thermal, and flame-retardant performances. For example, when compared with reference foam, the addition of 2 wt.% of MMT-modified SO filler resulted in the formation of PUR composites with greater mechanical properties (compressive strength, flexural strength) and improved dynamic-mechanical properties (storage modulus). The PUR composites were characterized by better thermal stability as well as improved flame retardancy-e.g., decreased peak rate of heat release (pHRR), reduced total smoke release (TSR), and increased limiting oxygen index (LOI).
在以下研究中制备了分别用1 wt.%、2 wt.%和5 wt.%的丹参填料（SO填料）以及蒙脱石改性丹参填料（MMT改性SO填料）增强的硬质聚氨酯（PUR）泡沫。研究了1 wt.%、2 wt.%和5 wt.%的SO填料以及MMT改性SO填料对PUR复合材料的形态、化学和力学性能的影响。在这两种情况下，添加1 wt.%和2 wt.%的SO填料均导致合成出物理机械性能得到改善的PUR复合材料，而添加5 wt.%的SO填料则导致形成结构较不均匀的PUR复合材料，因此其物理机械性能有所下降。此外，结果表明用MMT对SO填料进行改性改善了填料表面与PUR基体之间的相间相容性。因此，这种增强的PUR复合材料具有发达的闭孔结构以及改善的机械、热和阻燃性能。例如，与参比泡沫相比，添加2 wt.%的MMT改性SO填料导致形成具有更高机械性能（抗压强度、抗弯强度）和改善的动态力学性能（储能模量）的PUR复合材料。PUR复合材料具有更好的热稳定性以及改善的阻燃性，例如，热释放峰值速率（pHRR）降低、总烟雾释放量（TSR）减少以及极限氧指数（LOI）提高。
