Nabhan Ahmed, Sherif Galal, Abouzeid Ragab, Taha Mohamed
Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, El-Minia 61111, Egypt.
Cellulose and Paper Department, National Research Centre, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt.
J Funct Biomater. 2023 Mar 2;14(3):140. doi: 10.3390/jfb14030140.
Hip joint collapse is a very common health problem. Many cases need a joint replacement, so nano-polymeric composites are an ideal alternative solution. Due to its mechanical properties and wear resistance, HDPE might be considered a suitable alternative to frictional materials. The current research focuses on using hybrid nanofiller TiO NPs and nano-graphene with various loading compositions to evaluate the best loading amount. The compressive strength, modules of elasticity, and hardness were examined via experiments. The COF and wear resistance were evaluated via a pin-on-disk tribometer. The worn surfaces were analyzed based on 3D topography and SEM images. The HDPE samples with various compositions of 0.5%, 1.0%, 1.5%, and 2.0 wt.% filling content of TiO NPs and Gr (with a ratio of 1:1) were analyzed. Results revealed that hybrid nanofiller with a composition of 1.5 wt.% exhibits superior mechanical properties compared to other filling compositions. Moreover, the COF and wear rate decreased by 27.5% and 36.3%, respectively.
髋关节塌陷是一个非常常见的健康问题。许多病例需要进行关节置换，因此纳米聚合物复合材料是一种理想的替代解决方案。由于其机械性能和耐磨性，高密度聚乙烯（HDPE）可能被认为是摩擦材料的合适替代品。当前的研究集中在使用混合纳米填料二氧化钛纳米颗粒（TiO NPs）和纳米石墨烯以及各种负载组合物来评估最佳负载量。通过实验检测了抗压强度、弹性模量和硬度。通过销盘摩擦磨损试验机评估了摩擦系数（COF）和耐磨性。基于三维形貌和扫描电子显微镜（SEM）图像对磨损表面进行了分析。分析了TiO NPs和Gr（比例为1:1）填充量分别为0.5%、1.0%、1.5%和2.0 wt.%的各种组合物的HDPE样品。结果表明，与其他填充组合物相比，填充量为1.5 wt.%的混合纳米填料具有优异的机械性能。此外，摩擦系数和磨损率分别降低了27.5%和36.3%。
