玉米壳纤维作为再生一次性聚丙烯熔丝制造填料的效果,Journal of Vinyl and Additive Technology

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玉米壳纤维作为再生一次性聚丙烯熔丝制造填料的效果
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2023-11-19 , DOI: 10.1002/vnl.22074
Lim Kar Yap ₁ , Koay Seong Chun ₁ , Chan Ming Yeng ₂ , Ong Thai Kiat ₂ , Ho Shuh Huey ₂ , Ting Chen Hunt ₁ , Pang Ming Meng ₃

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熔丝制造 (FFF) 因其成本较低、易于操作且材料选择范围广而成为最受最终用户欢迎的 3D 打印方法之一。然而，使用由回收塑料和农业废物生产的复合长丝仍然相对不常见。本研究重点开发玉米壳纤维 (CHF) 和 FFF 回收一次性聚丙烯复合长丝。在这项工作中，纯再生聚丙烯 (rPP) 和 rPP/CHF 复合材料被挤出成用于 FFF 打印的长丝。据观察，增加 CHF 含量会降低零件的打印质量，因为在打印表面和层内会发现可见的气隙和空隙。然而，这些问题可以通过调整打印温度和增加打印过程中的挤出百分比来克服。熔体流动指数结果表明，较高的CHF含量会降低打印过程中挤出的rPP/CHF复合材料的熔体流动性，可能影响打印部件的质量。另一方面，提高温度增强了复合材料的熔体流动性，这有利于打印过程。当rPP中添加少量CHF时，由于纤维的增强作用，打印部件表现出最高的拉伸强度。然而，使用rPP/CHF复合长丝打印的部件的拉伸强度随着CHF含量的增加而降低。此外，较高的 CHF 含量导致打印的复合材料零件更加坚硬。它还减少了用这种复合材料制成的印刷样品的翘曲，但值得注意的是，印刷样品的翘曲与 CHF 成核效应引起的结晶度并不直接相关。由于添加了更多的 CHF，rPP/CHF 复合长丝确实表现出较早的热降解。然而，当温度不超过230°C时，这不应影响打印过程。这项研究强调了利用一次性 PP 和从玉米壳中提取的纤维作为 3D 打印原料的潜力。这些发现扩大了在可持续增材制造工艺中回收和利用农业废物的可能性。

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Effects of corn husk fiber as filler in recycled single-use polypropylene for fused filament fabrication

Fused filament fabrication (FFF) is one of the most popular 3D printing approaches among end-users due to its lower cost, ease of operation, and wide range of material choices. However, the use of composite filament produced from recycled plastic and agriculture waste is still relatively uncommon. This research focuses on developing composite filament from corn husk fiber (CHF) and recycled single-use polypropylene for FFF. In this work, neat recycled polypropylene (rPP) and rPP/CHF composites were extruded into filament for FFF printing. It was observed that increasing the CHF content would reduce the print quality of the parts, as visible air gaps and voids were found on the printed surface and within the layers. Nevertheless, these issues were able to be overcome by adjusting the printing temperature and increasing the extrusion percentage during the printing process. The melt flow index results indicate that a higher CHF content would reduce the melt flow of the extruded rPP/CHF composite during printing, potentially affecting the quality of the printed parts. On the other hand, increasing the temperature enhanced the melt flow of the composite, which was beneficial for the printing process. When a small amount of CHF was added to the rPP, the printed part exhibited the highest tensile strength due to the reinforcing effect of the fibers. However, the tensile strength of printed parts using rPP/CHF composite filament decreased with higher CHF content. Additionally, higher CHF content resulted in printed composite parts that were more rigid and stiffer. It also reduced warpage on the printed specimens made with this composite, but it is important to note that warpage of the printed specimen is not directly correlated to crystallinity caused by nucleating effect of CHF. The rPP/CHF composite filament did exhibit earlier thermal degradation due to the addition of more CHF. However, this should not affect the printing process when temperature not beyond 230°C. This study highlights the potential of utilizing single-use PP and fibers extracted from corn husk as feedstock for 3D printing. The findings expand the possibilities for recycling and employing agricultural waste in sustainable additive manufacturing processes.

更新日期：2023-11-19

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