https://orcid.org/0000-0002-7863-8720
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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
以鸡毛（0.5～1.0wt%、5～10wt%）为原料，采用挤出成型和增塑工艺制备了聚乳酸（PLA）增强聚合物复合材料. 在研磨后将其并入聚合物中，并对其进行研磨和氢氧化钠（NaOH）改性. 通过动态力学分析评估的热机械性能表明，处理后的地轴在1wt%时显著增加，相对于PLA，E′的增加最大（195%）. 扫描电子显微镜图像显示，根据所用增强体的类型和浓度，通过3D打印获得的化合物的断裂表面之间存在明显的差异. 此外，添加角蛋白后，3D打印复合材料的导热系数与PLA不同. 因此，通过3D打印技术获得的天然复合材料中含有极低浓度的角蛋白，PLA基体的热性能和热机械性能发生了显著变化.
Acknowledgments
The authors are grateful to Rivelino Flores for his assistance in the analysis of thermal properties and Dr. Marina Vega for her technical assistance in SEM. Martinez-Hernandez A.L. is grateful for the financial support from TECNM-6562.18-P and Flores-Hernández C. from CONACyT, as postdoctoral scholarship. “In memoriam Dr. Marisela Estefania Angeles-San Martin”.