Ultra high molecular weight polyethylene (UHMWPE) remains a primary choice of material for load bearing applications in total joint arthroplasty. Superior mechanical properties and wear resistance are unique to its performance. However, the addition of nanomaterials has improved its properties significantly. In the present study, a novel sandwich configuration has been considered to achieve unique surface and bulk properties specific to these sandwich composites. UHMWPE was reinforced at various loadings of 0.1, 0.3, 0.5, and 0.7 wt. % by surface modified Nano-diamond (ND). It is observed that the young's modulus, yield stress, fracture stress and toughness of UHMWPE were improved by 15, 31, 30, and 49.6% respectively at the optimum loading of 0.5 wt. % ND filler. The % of elongations and impact strength showed best results at 0.3 wt. % ND. Sandwich nanocomposites were prepared with the optimum loading of 0.3 & 0.5 wt. % ND and assessed for their properties and behaviour. The sectional hardness of sandwich nanocomposites revealed the cross-sectional variation of properties of the material. The reasons for diminution of the mechanical properties of nanocomposites and sandwich nanocomposites were also ascertained by rheological studies. The vibration response, damping behaviour, water contact angle and density of the composites which influence the longevity of the implant material were also assessed. The sandwich composite (PE 0.3ND - PE - PE 0.3ND) has shown better performance in all respect as compare to SW1 and SW3 composite due to good intermingling between the adjacent layers. It is concluded that the existence of ND improved the surface properties and mechanical properties of UHMWPE. However, sandwich nanocomposites have shown better properties unique unto itself.

超高分子量聚乙烯（UHMWPE）仍然是全关节置换中承重应用材料的主要选择。卓越的机械性能和耐磨性是其性能的独特之处。但是，纳米材料的添加显着改善了其性能。在本研究中，已经考虑了一种新颖的三明治结构，以实现这些三明治复合材料特有的独特表面和体积特性。UHMWPE在0.1、0.3、0.5和0.7 wt。表面改性的纳米金刚石（ND）的％。观察到，在0.5wt。％的最佳负载量下，UHMWPE的杨氏模量，屈服应力，断裂应力和韧性分别提高了15、31、30和49.6％。％ND填料。伸长％和冲击强度在0.3wt。％下显示出最佳结果。％ND。制备的三明治纳米复合材料的最佳负载量为0.3和0.5 wt。ND％，并评估其性能和行为。夹心纳米复合材料的截面硬度揭示了材料性能的截面变化。流变学研究还确定了纳米复合材料和夹心纳米复合材料的机械性能降低的原因。还评估了影响植入物寿命的复合材料的振动响应，阻尼行为，水接触角和密度。夹层复合材料（PE 0.3ND-PE-PE 0.3ND）在所有方面都表现出比SW1和SW3复合材料更好的性能，这是由于相邻层之间的良好混合。结论是，ND的存在改善了UHMWPE的表面性能和机械性能。但是，夹心纳米复合材料表现出更好的独特性能。