Patel Vijay, Joshi Unnati, Joshi Anand, Matanda Blessing Kudzai, Chauhan Kamlesh, Oza Ankit D, Burduhos-Nergis Diana-Petronela, Burduhos-Nergis Dumitru-Doru
Department of Mechanical Engineering, Parul University, Vadodara 391760, Gujarat, India.
Department of Mechatronics Engineering, Parul University, Vadodara 391760, Gujarat, India.
Polymers (Basel). 2023 Jun 22;15(13):2785. doi: 10.3390/polym15132785.
This manuscript presents an experimental investigation of the friction and wear properties of poly (methyl methacrylate) (PMMA) nanocomposites reinforced with functionalized multi-walled carbon nanotubes (MWCNTs). The aim of this study is to evaluate the potential of MWCNTs as a reinforcement material for enhancing the tribological performance of PMMA. Three types of multi-walled carbon nanotubes, i.e., pristine, hydroxyl functionalized, and carboxyl functionalized, were utilized in this study. The nanocomposite samples were prepared by dispersing varying concentrations of MWCNTs (0.1 wt.%, 0.5 wt.%, and 1 wt.%) within the PMMA matrix via a 3D mixing approach, followed by injection molding/compression molding. The resulting nanocomposite films were characterized using scanning electron microscopy (SEM) to observe the dispersion of MWCNTs within the PMMA matrix. The friction and wear tests were conducted using a pin-on-disk tribometer under dry sliding conditions. The effects of functionalization and MWCNT content on the tribological behaviors of the nanocomposites were analyzed. The nanocomposites exhibited lower friction coefficients and reduced wear rates compared to pure PMMA. The lowest friction coefficient and wear rate were achieved at an optimum MWCNT loading of 0.5 wt.%. It was further revealed that the amount of MWCNT reinforcement, average load, and track diameter significantly affect the coefficient of friction (COF) and rate of wear. The COF and wear rate are best at a filler loading of 0.5 wt.%, a 20 Kg load, and 90 mm. The improved tribological performance of the MWCNT-reinforced PMMA nanocomposites can be attributed to the effective transfer of load between the MWCNTs and the PMMA matrix, as well as the reinforcement effect of the MWCNTs. The MWCNTs acted as reinforcing agents, enhancing the mechanical properties and wear resistance of the nanocomposites.
本文献展示了对用功能化多壁碳纳米管（MWCNTs）增强的聚甲基丙烯酸甲酯（PMMA）纳米复合材料的摩擦和磨损性能的实验研究。本研究的目的是评估MWCNTs作为增强材料来提高PMMA摩擦学性能的潜力。本研究使用了三种类型的多壁碳纳米管，即原始的、羟基功能化的和羧基功能化的。通过三维混合方法将不同浓度（0.1 wt.%、0.5 wt.%和1 wt.%）的MWCNTs分散在PMMA基体中，随后进行注塑成型/压缩成型，制备出纳米复合材料样品。使用扫描电子显微镜（SEM）对所得纳米复合薄膜进行表征，以观察MWCNTs在PMMA基体中的分散情况。在干滑动条件下，使用销盘摩擦磨损试验机进行摩擦和磨损试验。分析了功能化和MWCNT含量对纳米复合材料摩擦学行为的影响。与纯PMMA相比，纳米复合材料表现出更低的摩擦系数和更低的磨损率。在MWCNT最佳负载量为0.5 wt.%时，获得了最低的摩擦系数和磨损率。进一步揭示，MWCNT增强量、平均负载和轨迹直径显著影响摩擦系数（COF）和磨损率。在填料负载量为0.5 wt.%、负载为20 Kg和轨迹直径为90 mm时，COF和磨损率最佳。MWCNT增强的PMMA纳米复合材料摩擦学性能的改善可归因于MWCNTs与PMMA基体之间有效的载荷传递以及MWCNTs的增强作用。MWCNTs充当增强剂，提高了纳米复合材料的力学性能和耐磨性。
