Fused deposition modelling (FDM) is one of the most effective 3D printing technologies and it shows high potential for various applications. The nano material reinforced FDM printed parts effectively overcome the limitations of low mechanical and tribological properties of the 3D printed parts. In this research work, the polylactic acid (PLA) / nano-silica bio nanocomposite filament was prepared for the additive manufactured FDM process. The nano-silica with various weight percentages (0, 2, 4, 6, 8) were blended with PLA and prepared the filament by extrusion process. The effect of nano-silica on PLA was investigated by mechanical and tribological properties and the test results revealed that the nano-silica plays a vital role. The addition of 8 wt% of nano-silica gave the highest tensile strength of 52 MPa, flexural strength of 52 MPa, Impact strength of 52 MPa. The maximum hardness value of 52 MPa was achieved. Similarly, the bio nanocomposite contains 8 wt% of nano-silica gave the low coefficient of friction and specific wear rate. All the above test results revealed that the PLA / nano-silica filaments are potential material for FDM.

熔融沉积建模（FDM）是最有效的3D打印技术之一，在各种应用中显示出巨大的潜力。纳米材料增强的FDM打印部件有效地克服了3D打印部件的低机械和摩擦学性能的局限性。在这项研究工作中，为增材制造的FDM工艺制备了聚乳酸（PLA）/纳米二氧化硅生物纳米复合材料长丝。将各种重量百分比（0、2、4、6、8）的纳米二氧化硅与PLA混合，并通过挤压工艺制备长丝。通过力学和摩擦学性质研究了纳米二氧化硅对PLA的影响，测试结果表明，纳米二氧化硅起着至关重要的作用。添加8 wt％的纳米二氧化硅可获得52 MPa的最高拉伸强度，52 MPa的弯曲强度，冲击强度为52 MPa。达到最大硬度值为52 MPa。类似地，生物纳米复合材料包含8重量％的纳米二氧化硅，具有较低的摩擦系数和比磨损率。以上所有测试结果表明，PLA /纳米二氧化硅长丝是FDM的潜在材料。