Reis Raphael H M, Garcia Filho Fabio C, Nunes Larissa F, Candido Veronica S, Silva Alisson C R, Monteiro Sergio N
Department of Materials Science, Military Institute of Engineering, Rio de Janeiro 22290-270, RJ, Brazil.
Department of Mechanical and Aerospace Engineering, University of California San Diego-UCSD, La Jolla, CA 92093, USA.
Polymers (Basel). 2021 Jul 10;13(14):2264. doi: 10.3390/polym13142264.
Fibers extracted from Amazonian plants that have traditionally been used by local communities to produce simple items such as ropes, nets, and rugs, are now recognized as promising composite reinforcements. This is the case for guaruman () fiber, which was recently found to present potential mechanical and ballistic properties as 30 vol% reinforcement of epoxy composites. To complement these properties, Izod impact tests are now communicated in this brief report for similar composites with up to 30 vol% of guaruman fibers. A substantial increase in impact resistance, with over than 20 times the absorbed energy for the 30 vol% guaruman fiber composite, was obtained in comparison to neat epoxy. These results were statistically validated by Weibull analysis, ANOVA, and Tukey's test. Scanning electron microscopy analysis disclosed the mechanisms responsible for the impact performance of the guaruman fiber composites.
从亚马逊植物中提取的纤维，当地社区传统上一直用其制作绳索、网和地毯等简单物品，现在被认为是很有前景的复合增强材料。瓜鲁曼（）纤维就是这种情况，最近发现它作为环氧树脂复合材料30体积%的增强材料，具有潜在的机械性能和防弹性能。为补充这些性能，本简要报告介绍了含高达30体积%瓜鲁曼纤维的类似复合材料的悬臂梁冲击试验。与纯环氧树脂相比，30体积%瓜鲁曼纤维复合材料的抗冲击性大幅提高，吸收能量超过20倍。这些结果通过威布尔分析、方差分析和图基检验得到了统计学验证。扫描电子显微镜分析揭示了瓜鲁曼纤维复合材料冲击性能的作用机制。
