从棕色到彩色：具有微/纳米结构化白色废咖啡渣的聚乳酸复合材料用于三维打印。
From brown to colored: Polylactic acid composite with micro/nano-structured white spent coffee grounds for three-dimensional printing.
机构信息
State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Victoria 3216, Australia.
出版信息
Int J Biol Macromol. 2021 Mar 31;174:300-308. doi: 10.1016/j.ijbiomac.2021.01.176. Epub 2021 Jan 30.
Functional fillers in three-dimensional (3D) printing composite filaments offer an innovative way spent coffee grounds (SCGs) can be reused. However, the inherent brownness of SCGs places a limit on the color in which the composite filament and, consequently, the finished print appears. Herein, colored composite filaments for fused deposition modeling were successfully fabricated, where micro/nano-structured decolorized SCGs (MN-DSCGs) were embedded within polylactic acid (PLA) matrix. At the optimum condition, the 3D prints using composite filaments exhibit comparable tensile and flexural strength to the PLA counterparts. Also, they demonstrate superior melt flow and excellent print quality. Under the same condition, 3D printed MN-DSCGs/PLA blend has sufficient color restoration as compared to the prints using virgin PLA.
三维（3D）打印复合长丝中的功能性填料为再利用废咖啡渣（SCG）提供了一种创新方法。然而，SCG 的固有棕色限制了复合长丝的颜色，进而限制了成品打印件的颜色。在此，成功制备了用于熔融沉积建模的彩色复合长丝，其中微/纳米结构化脱色 SCG（MN-DSCG）嵌入到聚乳酸（PLA）基质中。在最佳条件下，使用复合长丝的 3D 打印件表现出与 PLA 对应物相当的拉伸和弯曲强度。此外，它们还表现出优异的熔融流动性能和出色的打印质量。在相同条件下，与使用原生 PLA 的打印件相比，3D 打印的 MN-DSCG/PLA 共混物具有足够的颜色恢复能力。
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