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首页> 外文期刊>Journal of Applied Polymer Science >Ionic liquid modified graphene oxide for enhanced flame retardancy and mechanical properties of epoxy resin
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Ionic liquid modified graphene oxide for enhanced flame retardancy and mechanical properties of epoxy resin

机译：离子液体改性石墨烯氧化物，用于增强环氧树脂的阻燃性和机械性能

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In this work, to improve its dispersion and flame retardancy, graphene oxide (GO) was functionalized by silane coupling agent KH550 and 1-butyl-3-methylimidazole hexafluorophosphate (PF6-ILs), and characteristics of the PF6-ILs@GO was obtained by transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Then, the synergistic flame retardant of GO or PF6-ILs@GO and melamine pyrophosphate (MPP) were applied for epoxy resin (EP) materials. Specifically, the limiting oxygen index (LOI) value of EP with 0.1 wt% PF6-ILs@GO was increased to 29.2% from 27.5% of EP/MPP composites, and the UL-94 test reached the V-0 rating. The CCT results showed that the total heat release (THR) and total smoke release (TSP) of EP/MPP/PF6-ILs@GO composites were significantly 24.4% and 53.4% lower than that of EP/MPP composites. Besides, the thermal behavior investigated by TGA indicated that the char-forming effect of GO and PF6-ILs@GO was great, the residual char of EP/MPP/PF6-ILs@GO composites was as high as 19.5% at 700 degrees C, and its thermal stability was higher than that of EP/MPP composites. On the other hand, the tensile strength of EP/MPP/GO and EP/MPP/PF6-ILs@GO composites were increased by 15.6% and 28.3% compared with EP/MPP composites. According to SEM analysis, the EP/MPP/GO composites formed a good protective char layer, which can effectively improve flame retardancy of EP. This research represents a new method of flame retardant modified GO to improve the flame retardancy and mechanical properties of polymers.
机译：在这项工作中，为了提高其分散性和阻燃性，采用硅烷偶联剂KH550和1-丁基-3-甲基咪唑六氟磷酸盐（PF6-ILs）对氧化石墨烯（GO）进行功能化，并分析了PF6的特性-ILs@GO通过透射电子显微镜（TEM）、能量色散光谱（EDS）、傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）和热重分析（TGA）获得。然后，研究了GO或PF6的协同阻燃剂-ILs@GO将三聚氰胺焦磷酸盐（MPP）应用于环氧树脂（EP）材料。具体而言，含0.1 wt%PF6的EP的极限氧指数（LOI）值-ILs@GO从EP/MPP复合材料的27.5%增加到29.2%，UL-94测试达到V-0评级。CCT结果表明，EP/MPP/PF6的总热释放量（THR）和总烟气释放量（TSP）-ILs@GO复合材料显著低于EP/MPP复合材料的24.4%和53.4%。此外，TGA研究的热行为表明，GO和PF6的成炭效应-ILs@GO很好，EP/MPP/PF6的残炭-ILs@GO在700℃时，复合材料的热稳定性高达19.5%，高于EP/MPP复合材料。另一方面，EP/MPP/GO和EP/MPP/PF6的拉伸强度-ILs@GO与EP/MPP复合材料相比，复合材料增加了15.6%和28.3%。SEM分析表明，EP/MPP/GO复合材料形成了良好的保护炭层，可以有效地提高EP的阻燃性能。本研究为提高聚合物的阻燃性和力学性能提供了一种新的阻燃改性方法。

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