Abstract Graphene nanoplatelets (GNPs) are ideal reinforcements for improving the mechanical properties of aluminum-based matrices due to their outstanding properties. However, it essentially depends on their uniform dispersion in the matrix. In this study, the challenge of uniform dispersion of graphene was performed by functionalizing the non-covalent surface and sonication of GNPs applying non-ionic polymeric ethyl cellulose (EC) surfactant, in which a colloidal mixture was provided with Al powder and graphene, followed by sintering at 620 °C and consolidation. The density and mechanical properties of nanocomposite specimens were investigated and compared with a non-surfactant-assisted Al/GNP nanocomposite. The results showed that GNPs/Al specimen prepared by 1.5% (wt/vol) of surfactant and 0.5 wt% GNPs showed the highest hardness and reduced wear rate compared to non-surfactant-assisted Al/GNPs sample. Besides, the GNPs content was investigated and the optimum amount was found to be 0.5 wt%.

中文翻译：

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聚合物表面活性剂含量对Al/GNP纳米复合材料力学性能的影响

摘要 石墨烯纳米片（GNPs）因其优异的性能而成为改善铝基基体机械性能的理想增强材料。然而，这主要取决于它们在基体中的均匀分散。在这项研究中，石墨烯均匀分散的挑战是通过应用非离子聚合乙基纤维素 (EC) 表面活性剂对 GNP 的非共价表面进行功能化和超声处理来进行的，其中胶体混合物由铝粉和石墨烯提供，然后通过在 620 °C 下烧结和固结。研究了纳米复合材料试样的密度和机械性能，并与非表面活性剂辅助的 Al/GNP 纳米复合材料进行了比较。结果表明，GNPs/Al 试样由 1.5% (wt/vol) 的表面活性剂和 0. 与非表面活性剂辅助的 Al/GNP 样品相比，5 wt% 的 GNP 显示出最高的硬度和降低的磨损率。此外，研究了 GNPs 的含量，发现最佳用量为 0.5 wt%。