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

被引：0
作者：
El Dein, Ali Nour [1 ,2 ,3 ]
Le Moigne, Nicolas [2 ]
Pucci, Monica Francesca [1 ]
Regazzi, Arnaud [1 ]
Barbulee, Antoine [3 ]
Gamond, Olivier [4 ]
Caro, Anne-Sophie [1 ]
机构：
[1] Univ Montpellier, LMGC, IMT Mines Ales, CNRS, Ales, France
[2] IMT Mines Ales, Polymers Compos & Hybrids PCH, Ales, France
[3] DEPESTELE, Teillage Vandecandelaere, 5 Rue Eglise, F-14540 Bourguebus, France
[4] AG PLAST, Route Matafelon, F-01460 Nurieux Volognat, France
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2025年 / 192卷
关键词：
Biocomposites; Plant fibres; Microstructure; X-ray tomography; MECHANICAL-PROPERTIES; FLAX FIBER; POLYPROPYLENE COMPOSITES; HYBRID COMPOSITES; COUPLING AGENT; JUTE FIBER; ORIENTATION; POLYMER; BREAKAGE; SIZE;
D O I：
10.1016/j.compositesa.2025.108769
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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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页数：17
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