A simple and rapid synthesis of biobased epoxy resin derived from vanillyl alcohol was performed, and its chemical structure was confirmed by FTIR and ¹H and ¹³C NMR spectroscopies. Vanillin-based epoxy resin (VE) was further reinforced by lignin-containing cellulose nanofibrils (LCNFs) with different weight ratios. Characteristics of the resin and the nanocomposites, including the curing process, chemical structure, morphology, mechanical performance, thermo-mechanical properties, and thermal degradation behavior, were studied. A significant improvement in the mechanical performance of the nanocomposites was achieved with a low level of nanofibril addition. Tensile strength and toughness increased by 81% and 185%, respectively, when 1 wt % of LCNFs were used. The nanocomposite also showed an increase in thermo-mechanical properties as measured by dynamic mechanical analysis (DMA) and increased resistance to thermal degradation as shown by higher onset temperature and final char value in thermogravimetric analysis (TGA). This study showcased a promising approach to make environmentaly friendly sustainable biobased epoxy products with superior performance.

中文翻译：

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香草醛衍生物合成的生物基环氧树脂及其使用含木质素的纤维素纳米原纤维的增强作用

进行了一种简单，快速的合成，以香草醛醇为原料的生物基环氧树脂的合成，其化学结构已通过FTIR和¹ H和¹³13 C NMR光谱。香兰素基环氧树脂（VE）被具有不同重量比的含木质素的纤维素纳米原纤维（LCNF）进一步增强。研究了树脂和纳米复合材料的特性，包括固化过程，化学结构，形态，机械性能，热机械性能和热降解行为。少量添加纳米原纤维可实现纳米复合材料机械性能的显着改善。当使用1wt％的LCNF时，拉伸强度和韧性分别增加了81％和185％。纳米复合材料还表现出通过动态力学分析（DMA）测得的热机械性能的提高，以及对热降解的抵抗力的提高，如热重分析（TGA）中较高的起始温度和最终炭值所显示。这项研究展示了一种有前途的方法，可以使环保，可持续的生物基环氧产品具有优异的性能。