ABSTRACT

Polymer composites of polylactic acid (PLA) reinforced with rachis obtained from chicken feathers (0.5–1.0 wt %, 5–10 wt%) were developed by extrusion and additive manufacturing. Rachis was incorporated into the polymer after milling, and it was also milled and modified with sodium hydroxide (NaOH). Thermomechanical properties evaluated by dynamical mechanical analysis revealed significant increments with treated ground rachis at 1 wt%, which produced the greatest increase in E´ with respect to PLA (195%). The scanning electron microscopy images show a clear difference between the fracture surface of the compounds obtained by 3D printing according to the type and concentration of reinforcement used. In addition, the 3D printing composites show different thermal conductivities than PLA with the addition of keratin. Thus, natural composites obtained by 3D printing technology with very low concentrations of keratin show significant changes in thermal and thermomechanical properties of PLA matrix.

摘要

通过挤压和增材制造开发了用鸡毛（0.5-1.0 wt%，5-10 wt%）获得的羽轴增强的聚乳酸（PLA）聚合物复合材料。在研磨后将轴掺入聚合物中，并且还用氢氧化钠 (NaOH) 对其进行研磨和改性。通过动态力学分析评估的热力学性能显示，经过处理的地轴在 1 wt% 时显着增加，相对于 PLA (195%)，E' 的增加最大。扫描电子显微镜图像显示，根据所用增强材料的类型和浓度，通过 3D 打印获得的化合物的断面存在明显差异。此外，添加角蛋白的 3D 打印复合材料显示出与 PLA 不同的热导率。因此，