Russo Pietro, Cimino Francesca, Tufano Antonio, Fabbrocino Francesco
Institute for Polymers, Composites and Biomaterials, National Research Council, Via Campi Flegrei 34, 80078 Pozzuoli, Italy.
Department of Engineering, Telematic University Pegaso, Centro Direzionale Napoli Isola F2, Pegaso Tower, 80143 Napoli, Italy.
Nanomaterials (Basel). 2021 May 31;11(6):1454. doi: 10.3390/nano11061454.
The growing demand for lightweight and multifunctional products in numerous industrial fields has recently fuelled a growing interest in the development of materials based on polymer matrices including graphene-like particles, intrinsically characterized by outstanding mechanical, thermal, and electrical properties. Specifically, with regard to one of the main mass sectors, which is the automotive, there has been a significant increase in the use of reinforced polyamides for underhood applications and fuel systems thanks to their thermal and chemical resistance. In this frame, polyamide 6 (PA6) composites filled with graphene nanoplatelets (GNPs) were obtained by melt-compounding and compared in terms of thermal and mechanical properties with the neat matrix processed under the same condition. The results of the experimental tests have shown that the formulations studied so far offer slight improvements in terms of thermal stability but much more appreciable benefits regarding both tensile and flexural parameters with respect to the reference material. Among these effects, the influence of the filler content on the strength parameter is noteworthy. However, the predictable worsening of the graphene sheet dispersion for GNPs contents greater than 3%, as witnessed by scanning electron images of the tensile fractured sections of specimens, affected the ultimate performance of the more concentrated formulation.
众多工业领域对轻质多功能产品的需求不断增长，这最近激发了人们对基于聚合物基体开发材料的兴趣，这类材料包括具有类石墨烯颗粒，其固有特性是具有出色的机械、热和电性能。具体而言，在主要的大规模应用领域之一汽车行业，由于其耐热性和耐化学性，用于发动机罩下应用和燃油系统的增强聚酰胺的使用量显著增加。在此背景下，通过熔融共混制备了填充有石墨烯纳米片（GNPs）的聚酰胺6（PA6）复合材料，并在相同条件下将其热性能和机械性能与纯基体进行了比较。实验测试结果表明，到目前为止所研究的配方在热稳定性方面有轻微改善，但相对于参考材料，在拉伸和弯曲参数方面有更明显的优势。在这些影响中，填料含量对强度参数的影响值得注意。然而，如试样拉伸断裂截面的扫描电子图像所示，当GNPs含量大于3%时，石墨烯片分散性会出现可预见的恶化，这影响了浓度更高配方的最终性能。
