Costa Ulisses Oliveira, Garcia Filho Fabio da Costa, Río Teresa Gómez-Del, Rodrigues João Gabriel Passos, Simonassi Noan Tonini, Monteiro Sergio Neves, Nascimento Lucio Fabio Cassiano
Materials Science Department of Military Institute of Engineering-IME, Rio de Janeiro 22290-270, Brazil.
Durability and Mechanical Integrity of Structural Materials Group (DIMME), School of Experimental Sciences and Technology, Rey Juan Carlos University, C/Tulipán, s/n. Móstoles, 28933 Madrid, Spain.
Polymers (Basel). 2023 May 26;15(11):2460. doi: 10.3390/polym15112460.
Natural lignocellulosic fibers (NLFs) have been used as a reinforcement for polymer matrix composites in the past couple of decades. Their biodegradability, renewability, and abundance make them appealing for sustainable materials. However, synthetic fibers surpass NLFs in mechanical and thermal properties. Combining these fibers as a hybrid reinforcement in polymeric materials shows promise for multifunctional materials and structures. Functionalizing these composites with graphene-based materials could lead to superior properties. This research optimized the tensile and impact resistance of a jute/aramid/HDPE hybrid nanocomposite by the addition of graphene nanoplatelets (GNP). The hybrid structure with 10 jute/10 aramid layers and 0.10 wt.% GNP exhibited a 2433% increase in mechanical toughness, a 591% increase in tensile strength, and a 462% reduction in ductility compared to neat jute/HDPE composites. A SEM analysis revealed the influence of GNP nano-functionalization on the failure mechanisms of these hybrid nanocomposites.
在过去几十年中，天然木质纤维素纤维（NLFs）一直被用作聚合物基复合材料的增强材料。它们的生物可降解性、可再生性和丰富性使其成为可持续材料的理想选择。然而，合成纤维在机械性能和热性能方面优于NLFs。将这些纤维作为混合增强材料应用于聚合物材料中，有望实现多功能材料和结构。用石墨烯基材料对这些复合材料进行功能化处理可能会带来优异的性能。本研究通过添加石墨烯纳米片（GNP）优化了黄麻/芳纶/高密度聚乙烯（HDPE）混合纳米复合材料的拉伸性能和抗冲击性能。与纯黄麻/HDPE复合材料相比，具有10层黄麻/10层芳纶和0.10 wt.% GNP的混合结构的机械韧性提高了2433%，拉伸强度提高了591%，延展性降低了462%。扫描电子显微镜（SEM）分析揭示了GNP纳米功能化对这些混合纳米复合材料失效机制的影响。
