Mechanical recycling of poly(lactic acid)/agave fiber biocomposites

IF 2.3 3区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Journal of Reinforced Plastics and Composites Pub Date : 2024-05-13 DOI:10.1177/07316844241253905

Tomas Ramos-Hernández, Jorge Ramón Robledo-Ortíz, Alan Salvador Martín del Campo, Denis Rodrigue, Alfredo Cano, Aida Alejandra Pérez-Fonseca

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Abstract

This paper focuses on evaluating the mechanical recycling potential of poly(lactic acid) (PLA) biocomposites reinforced with agave fibers (AF). The biocomposites were prepared by extrusion using 5, 15, and 30 wt.% of agave fibers and reprocessed up to eight times. The results show that the fiber dimensions substantially decrease during reprocessing, especially after the first extrusion cycle, followed by a more gradual decrease in each subsequent cycle. The melt flow index (MFI) and the mechanical properties (except impact strength) tend to decrease as the fiber concentration increases. On the other hand, the glass transition temperature ( T g) and the crystallinity ( X c) of the biocomposites increased with increasing fiber concentration. It is important to highlight that closed-loop reprocessing does not significantly affect the overall behavior of the biocomposites under the conditions investigated. Therefore, PLA reinforced with AF is suitable for primary recycling since the final properties are mainly influenced by the fiber concentration and less by the number of reprocessing cycles.

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聚（乳酸）/龙舌兰纤维生物复合材料的机械再循环

本文重点评估了用龙舌兰纤维（AF）增强的聚乳酸（PLA）生物复合材料的机械回收潜力。使用 5、15 和 30 wt.% 的龙舌兰纤维通过挤压法制备生物复合材料，并进行了多达八次的再加工。结果表明，在再加工过程中，尤其是在第一个挤压循环之后，纤维的尺寸会大幅减小，而在随后的每个循环中，纤维的尺寸会逐渐减小。随着纤维浓度的增加，熔体流动指数（MFI）和机械性能（冲击强度除外）也呈下降趋势。另一方面，生物复合材料的玻璃化温度（T g）和结晶度（X c）随着纤维浓度的增加而增加。需要强调的是，在所研究的条件下，闭环再加工不会对生物复合材料的整体行为产生显著影响。因此，用 AF 增强的聚乳酸适用于初级回收，因为最终性能主要受纤维浓度的影响，而受再加工循环次数的影响较小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Reinforced Plastics and Composites 工程技术-材料科学：复合

CiteScore

5.40

自引率

6.50%

发文量

审稿时长

1.3 months

期刊介绍： The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in: Constituent materials: matrix materials, reinforcements and coatings. Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference. Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition. Processing and fabrication: There is increased interest among materials engineers in cost-effective processing. Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation. Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials. "The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan This journal is a member of the Committee on Publication Ethics (COPE).