Multiscale structural analysis of plant fibre-reinforced thermoplastic biocomposites: Towards realistic 2D and 3D descriptors for advanced modelling

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2025-02-05 DOI:10.1016/j.compositesa.2025.108769

Ali Nour El Dein , Nicolas Le Moigne , Monica Francesca Pucci , Arnaud Regazzi , Antoine Barbulée , Olivier Gamond , Anne-Sophie Caro

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Abstract

This study presents an in-depth microstructural analysis of injection-moulded polypropylene composites reinforced with flax shives (FS) of different sizes and compounded by twin-screw extrusion. A multi-scale approach, using laser diffraction, 2D scanning, scanning electron microscopy (SEM) and X-ray tomography, is developed to investigate the influence of initial FS size distribution on composite microstructure, including FS size and shape distribution, orientation, and dispersion. The 2D scanner proves to be the most practical and user-friendly tool for measuring FS size and shape distribution. Fibre size reduction during extrusion was successfully modelled, particularly for aspect ratio estimation, with medium-sized particles yielding the highest aspect ratios in injection moulded specimens. SEM observations reveals that fine particles give the best dispersion. FS orientation analysis using X-ray tomography shows that medium-sized particles align more along the injection flow compared to coarser particles. Such 2D and 3D microstructural analyses are required for advanced modelling of biocomposite properties.

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植物纤维增强热塑性生物复合材料的多尺度结构分析：面向先进建模的现实2D和3D描述符

采用双螺杆挤压复合的方法，对不同尺寸亚麻片增强聚丙烯注射成型复合材料的微观结构进行了深入分析。采用激光衍射、二维扫描、扫描电镜（SEM）和x射线断层扫描等多尺度方法，研究了初始FS尺寸分布对复合材料微观结构的影响，包括FS尺寸和形状分布、取向和色散。二维扫描仪被证明是测量FS尺寸和形状分布的最实用和用户友好的工具。成功地模拟了挤压过程中纤维尺寸的减小，特别是长径比估计，中等大小的颗粒在注射成型样品中产生最高的长径比。扫描电镜观察表明，细颗粒的分散性最好。使用x射线断层扫描的FS取向分析表明，与粗颗粒相比，中等大小的颗粒更沿注入流排列。这种二维和三维微观结构分析是生物复合材料特性的高级建模所必需的。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.