生物炭增强3D打印PLA的加工和磨损性能

IF 1.5 Q3 ENGINEERING, MECHANICAL
Ertan G. Ertane, A. Dorner-Reisel, O. Baran, T. Welzel, Viola Matner, Stefan Svoboda
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引用次数: 50

摘要

生物碳增强聚乳酸(PLA)长丝首次可用于3D打印。生物碳是从树木、植物和土壤中获得的碳,用于自然吸收和储存大气中的二氧化碳。最重要的特性之一是可更新性。正因为如此,决定用生物碳增强PLA,以获得100%可回收材料。尽管PLA在3D打印中已经使用了很长时间,但如果机械和摩擦学性能得到改善,可以实现更多的应用,如汽车或其他车辆的外壳或结构内部。由于新型PLA/生物碳增强复合材料是可降解的,它们可以作为一种结构材料在使用寿命结束后用于土壤改良。通过将生物碳与聚乳酸颗粒复合来制备细丝。生物碳是由小麦茎在800°C下热解产生的。生物量是从德国、欧洲的不同地区收集的。如拉曼光谱所示,来自不同区域的热解麦秆的面内晶粒尺寸几乎相似,总计为2.35±0.02nm。生物碳颗粒被成功地整合到聚乳酸中。生产用于3D(三维)打印的直径为1.75mm的细丝。挤出具有5体积%、15体积%和30体积%生物碳的长丝。熔融沉积建模(FDM)打印过程在较高的生物碳负载下受到轻微阻碍。基于光学和扫描电子显微镜,可以观察到非常均匀的颗粒分布。单个碳颗粒从细丝表面伸出,这可能是3D打印过程中喷嘴磨损加剧的原因。与未增强PLA和具有较低颗粒分数的复合材料相比,30体积%增强PLA的摩擦更稳定。这种效应可能是由于在具有30体积%生物碳的PLA表面产生空隙而引起的一些地形效应引起的。一般来说,随着生物碳体积分数的增加,摩擦学阻力增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Processing and Wear Behaviour of 3D Printed PLA Reinforced with Biogenic Carbon
For the first time, biocarbon reinforced polylactide (PLA) filaments were available for the 3D printing. Biocarbon is the carbon obtained from trees, plants, and soils to naturally absorb and store carbon dioxide from the atmosphere. One of the most important features is renewability. Because of this, it has been decided to reinforce PLA with biocarbon to obtain 100% recyclable material. Although PLA has been used in 3D printing for a long time, more applications like housings or structural interior of automobiles or other vehicles can be realised, if the mechanical and tribological properties are improved. Because the new PLA/biocarbon reinforced composites are degradable, they can be used as soil improvement after end of life as a structural material. The filaments were produced by compounding the biocarbon with polylactide granulate. Biocarbon was produced by pyrolysis of wheat stems at 800°C. The biomass were collected from different regions in Germany, Europe. As shown by Raman spectroscopy, the in-plane crystallite size of pyrolysed wheat stems from different regions is almost similar and amounts to 2.35 ±0.02 nm. Biocarbon particles were successfully integrated into the polylactide. Filaments of 1.75 mm diameter were produced for 3D (3-dimensional) printing. Filaments with 5 vol.-%, 15 vol.-%, and 30 vol.-% biocarbon were extruded. The fused deposition modelling (FDM) printing process was slightly hindered at higher biocarbon loading. Based on optical and scanning electron microscopy, a very homogeneous particle distribution can be observed. Single carbon particles stick out of the filament surface, which may be a reason for enhanced nozzle wear during 3D printing. Friction is more stable for 30 vol.-% reinforced PLA in comparison to unreinforced PLA and composites with lower particle fraction. This effect could be caused by some topographical effects due to void generation at the surface of PLA with 30 vol.-% biocarbon. In general, the tribological resistance increases with higher volume fraction of biocarbon.
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
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1
审稿时长
13 weeks
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