Bio-based composites are reinforced polymeric materials, which include one or two bio-based components. Biocomposites have recently attracted great attention for applications ranging from home appliances to the automotive industry. The outstanding advantages are low cost, biodegradability, lightness, availability, and solving environmental problems. In recent days, biodegradable natural fibers are attracting a great deal of interest from researchers to work on and develop a new type of composite material for diverse applications. The objective of this work is to evaluate fire resistance and mechanical properties of epoxy polymer composites reinforced with lychee peel (Vietnam), at 10 wt%, 20 wt%, and 30 wt% mass%. The study showed that the mechanical properties and flame retardancy tended to increase in the presence of lychee peel reinforcement. In the combined ratios, 20 wt% lychee rind gave a limiting oxygen index of 21.5%, with a burning rate of 23.45 mm/min. In terms of mechanical strength, in which the Izod impact strength increased by 26.46%, the compressive strength increased by 25.20% and the tensile strength increased by 20.62%. The microscopic images (SEM images) show that the particle distribution is quite good and the adhesion and wetting compatibility on the two-phase interface of lychee peel-epoxy resin are strong.

中文翻译：

---

基于环氧树脂的荔枝皮开发的生物复合材料：力学性能和阻燃性

生物基复合材料是增强型聚合物材料，其中包括一种或两种生物基成分。生物复合材料最近在从家用电器到汽车行业的应用中引起了极大的关注。突出的优点是成本低、可生物降解、重量轻、可用性高，并能解决环境问题。最近几天，可生物降解的天然纤维引起了研究人员的极大兴趣，他们致力于研究和开发一种用于多种应用的新型复合材料。这项工作的目的是评估用荔枝皮（越南）增强的环氧聚合物复合材料的耐火性和机械性能，质量百分比为 10%、20% 和 30%。研究表明，荔枝皮增强剂的存在下，力学性能和阻燃性有提高的趋势。在组合比率中，20 wt% 荔枝皮的极限氧指数为 21.5%，燃烧速率为 23.45 mm/min。机械强度方面，Izod冲击强度提高26.46%，抗压强度提高25.20%，抗拉强度提高20.62%。显微图像（SEM图像）表明，荔枝皮-环氧树脂两相界面的颗粒分布非常好，附着力和润湿相容性强。