The increasing interest in reducing the dependence on fossil-based resources by searching and replacing them with renewable biobased sources has intensified in both industrial and academic sectors. Especially, lignocellulose-based biomass can be utilized in the production of many aromatic platform chemicals suitable as substitutes for known fossil-based chemicals. For example, cellulose-derived 5-(hydroxymethyl)furfural has been utilized successfully for the aforementioned purposes. On the other hand, hemicellulose-derived furfural has received rather minor attention, even though recent studies show various excellent results in applications especially utilizing furfural. In this work, two novel furfural-derived epoxy resins were synthesized. Comparative studies were conducted with commercially available and widely used fossil-based epoxy resin, diglycidyl ether of bisphenol A. Resins were cured with methylhexahydrophthalic anhydride with optimized amounts of the 2-ethyl-4-methylimidazole initiator. Curing behaviors were studied with differential scanning calorimetry while thermomechanical properties were evaluated using dynamic mechanical analysis and thermal stabilities with thermogravimetric analysis. Adhesion strengths were tested with single-lap joint steel plate samples using a tensile tester. Tensile testing was also carried out for dog-bone-shaped resin specimens. Lastly, the water absorptions were evaluated through immersion in water. Results showed that the synthesized bioresins have great potential to replace diglycidyl ether of bisphenol A in various applications.

中文翻译：

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可再生糠醛基硫桥环氧树脂，具有优异的粘合性能


在工业和学术领域，人们越来越关注通过寻找和用可再生的生物基资源取代化石基资源来减少对化石资源的依赖。特别是，基于木质纤维素的生物质可用于生产许多适合替代已知化石基化学品的芳香族平台化学品。例如，纤维素衍生的 5-（羟甲基）糠醛已成功用于上述目的。另一方面，半纤维素衍生的糠醛受到的关注相当少，尽管最近的研究表明在应用中，特别是利用糠醛，效果很好。在这项工作中，合成了两种新型糠醛衍生的环氧树脂。与市售和广泛使用的化石基环氧树脂、双酚 A 的二缩水甘油醚进行了比较研究。树脂用甲基六氢邻苯二甲酸酐和最适量的 2-乙基-4-甲基咪唑引发剂固化。使用差示扫描量热法研究固化行为，同时使用动态力学分析评估热机械性能，使用热重分析评估热稳定性。使用拉伸试验机对单搭接接头钢板样品测试粘合强度。还对狗骨形树脂试样进行了拉伸试验。最后，通过浸入水中评估吸水率。结果表明，合成的生物树脂在各种应用中具有替代双酚 A 的二缩水甘油醚的巨大潜力。