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首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of Soybean Hull Fiber Concentration on the Water Absorption and Mechanical Properties of 3D-Printed Thermoplastic Copolyester/Soybean Hull Fiber Composites
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Influence of Soybean Hull Fiber Concentration on the Water Absorption and Mechanical Properties of 3D-Printed Thermoplastic Copolyester/Soybean Hull Fiber Composites

机译：大豆壳纤维浓度对3D印刷热塑性共聚酯/大豆纤维复合材料吸水和力学性能的影响

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摘要

In this work, fused filament fabrication 3D-printed parts of soybean hull fiber thermoplastic copolyester (TPC) composites with soybean hull fiber concentrations of 0-35 wt.% were tested to understand the influence of mechanical properties and moisture sensitivity on the soybean hull fiber concentration. The composites were analyzed for their microstructures and mechanical properties in as-printed condition and after immersion in deionized water for 168 h. The printed parts with >= 25 wt.% soybean hull fiber were found to have more porosity (9-12%) leading to high rate of water absorption with a maximum weight gain of similar to 8% and up to 4% volumetric swelling. However, in the as-printed condition, these composites exhibited significantly higher elastic modulus of 80 +/- 3 MPa than pure TPC (36 +/- 3 MPa) and their strength improved by 40%. The toughness of the composites decreased below that of pure TPC when the fiber concentration was 35 wt.% due to significant drop in the elongation. The composites with <= 15 wt.% soybean hull fiber showed marginal drop in the mechanical properties due to water absorption. Additionally, the microstructural analysis showed good fiber-matrix interfacial characteristics in as-printed condition, which were damaged due to moisture absorption in addition to defragmentation of fiber bundles. Interestingly, the toughness of TPC-soybean hull fiber composites was immune to water absorption and the deleterious effect of moisture on the mechanical appears to be partly reversible after drying the composites.
机译：在这项工作中，具有0-35重量％的大豆壳纤维浓度的大豆壳热塑性共聚酯（TPC）复合材料的熔丝灯丝制造3D印刷部分。％检测％，以了解机械性能和水分敏感性对大豆壳纤维的影响专注。分析复合材料以在印刷条件下的微观结构和机械性能，并在去离子水中浸入去离子水后168小时。含有> = 25重量％的印刷部件。发现％大豆壳纤维具有更多的孔隙率（9-12％），导致高吸水率，最大重量增益与8％相似，高达4％容量溶胀。然而，在印刷条件下，这些复合材料显着较高的80 +/- 3MPa的弹性模量比纯TPC（36 +/- 3MPa），其强度提高了40％。当纤维浓度为35重量％时，复合材料的韧性降低了纯TPC。％由于伸长率显着下降。具有<= 15重量％的复合材料。％大豆壳纤维由于吸水性而显示出机械性能的边缘下降。另外，微结构分析显示出在印刷条件下的良好纤维 - 基质界面特征，除了纤维束的碎片整碎之外，由于湿度吸收，损坏。有趣的是，TPC-大豆壳纤维复合材料的韧性免受吸水性，并且在干燥复合材料后，机械水分对机械的有害效果似乎是部分可逆的。

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