Zaidi Siti Aisyah Syazwani, Kwan Cham Eng, Mohan Denesh, Harun Shuhaida, Luthfi Abdullah Amru Indera, Sajab Mohd Shaiful
Research Center for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia.
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia.
Materials (Basel). 2023 Feb 22;16(5):1793. doi: 10.3390/ma16051793.
As additive manufacturing continues to evolve, there is ongoing discussion about ways to improve the layer-by-layer printing process and increase the mechanical strength of printed objects compared to those produced by traditional techniques such as injection molding. To achieve this, researchers are exploring ways of enhancing the interaction between the matrix and filler by introducing lignin in the 3D printing filament processing. In this work, research has been conducted on using biodegradable fillers of organosolv lignin, as a reinforcement for the filament layers in order to enhance interlayer adhesion by using a bench-top filament extruder. Briefly, it was found that organosolv lignin fillers have the potential to improve the properties of polylactic acid (PLA) filament for fused deposition modeling (FDM) 3D printing. By incorporating different formulations of lignin with PLA, it was found that using 3 to 5% lignin in the filament leads to an improvement in the Young's modulus and interlayer adhesion in 3D printing. However, an increment of up to 10% also results in a decrease in the composite tensile strength due to the lack of bonding between the lignin and PLA and the limited mixing capability of the small extruder.
随着增材制造技术的不断发展，人们一直在讨论如何改进逐层打印工艺，并提高打印物体相对于注塑成型等传统技术所生产物体的机械强度。为了实现这一目标，研究人员正在探索通过在3D打印长丝加工过程中引入木质素来增强基体与填料之间相互作用的方法。在这项工作中，研究人员使用台式长丝挤出机，对采用有机溶剂木质素这种可生物降解填料作为长丝层增强材料以提高层间附着力进行了研究。简而言之，研究发现有机溶剂木质素填料具有改善用于熔融沉积建模（FDM）3D打印的聚乳酸（PLA）长丝性能的潜力。通过将不同配方的木质素与PLA混合，发现长丝中使用3%至5%的木质素会提高3D打印中的杨氏模量和层间附着力。然而，由于木质素与PLA之间缺乏粘结以及小型挤出机的混合能力有限，木质素含量增加至10%也会导致复合材料拉伸强度下降。
