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首页> 外文期刊>Review of Agricultural Entomology >Monitoring the Diameter Changes of Flax Fibre Elements during Twin Screw Extrusion Using X-Ray Computed Micro-Tomography
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Monitoring the Diameter Changes of Flax Fibre Elements during Twin Screw Extrusion Using X-Ray Computed Micro-Tomography

机译：使用X射线计算微型层面监测双螺杆挤出期间亚麻纤维元件的直径变化

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摘要

Fiber size aspect ratio is known to impact the mechanical and reinforcement properties of natural fiber-based composites. However, the representation of fiber diameter change occurring during the extrusion process is controversial compared to the length. Fiber elements undergo multidirectional stresses and complex interactions within the extruder, leading to their breakage, which consequently may modulate their reinforcing properties. To better understand these mechanisms, short fiber reinforced polymer composites were prepared from flax fibers and polypropylene matrix (PP) by melt mixing. Five sampling zones were selected along the screws, both in screw conveying elements and inside blocks of kneading discs. X-ray computed micro-tomography, and 3D images analysis were then used for monitoring sample diameter distributions along the screw profile, according to specific twin-screw compounding conditions. The effects of the considered processing condition on fiber bundle diameters decrease along the screw profile are quantified.
机译：已知纤维尺寸纵横比对天然纤维基复合材料的机械和增强性能影响。然而，与长度相比，在挤出过程中发生的纤维直径变化的表示是有争议的。纤维元件在挤出机内进行多向应力和复杂的相互作用，导致其破裂，从而可以调节它们的增强性能。为了更好地理解这些机制，通过熔融混合从亚麻纤维和聚丙烯基质（PP）制备短纤维增强聚合物复合材料。沿螺钉选择五个采样区，螺钉输送元件和捏合盘的内部块。根据具体的双螺杆复合条件，然后根据具体的双螺杆复合条件，使用X射线计算的微型断层扫描和3D图像分析用于监测沿螺杆轮廓的样品直径分布。定量了沿着螺钉轮廓的考虑处理条件对纤维束直径的影响。

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