材料科学
聚乳酸
极限抗拉强度
动态力学分析
傅里叶变换红外光谱
挤压
复合材料
熔丝制造
结晶度
热稳定性
拉伸试验
蛋白质丝
热分析
3D打印
聚合物
化学工程
热的
工程类
物理
气象学
作者
Victor Chike Agbakoba,Nicholas Webb,Emmanuel Jegede,Russell Phillips,Shanganyane Percy Hlangothi,Maya Jacob John
标识
DOI:10.1002/mame.202300276
摘要
Abstract There is a growing need to address waste generated from Fused Filament Fabrication (FFF) 3D printing activities. This study explores the mechanical recycling of waste polylactic acid (PLA) accumulated from failed 3D printing operations and PLA biocomposite filaments containing nanocellulose fibres. FFF 3D printable filaments were produced via melt mixing and extrusion of virgin PLA containing varying amounts of waste PLA. The chemical, thermal and thermomechanical characterisation of each specimen was evaluated using Fourier‐transform infrared spectroscopy (FTIR), simultaneous thermal analysis (SDT), dynamic mechanical analysis (DMA), and uniaxial tensile analysis (UTA). A desktop FFF 3D printer was used to fabricate UTA and DMA test specimens. The thermal stability of the filament specimens containing waste derived from the failed 3D prints were comparable with that of the commercial filaments. However, a 11% decrease in the onset of thermal degradation is observed for the filament containing waste biocomposites. The specimens containing waste PLA exhibited higher crystallinity and storage modulus. UTA results revealed similar tensile strength and % elongation, except for the specimen containing 50% waste PLA which exhibited a 29% decrease in tensile strength. This work successfully demonstrates mechanical recycling as a viable waste management strategy for waste materials generated during FFF 3D printing.
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