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首页> 外文期刊>Journal of Polymers and the Environment >Influence of Filler Particle Size on Physical Properties and Biodegradation of Biocomposites Based on Low-Density Polyethylene and Lignocellulosic Fillers
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Influence of Filler Particle Size on Physical Properties and Biodegradation of Biocomposites Based on Low-Density Polyethylene and Lignocellulosic Fillers

机译：基于低密度聚乙烯和木质纤维素填料的填料粒径对生物复合材料物理性能和生物降解的影响

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摘要

This study examined biocomposites based on low-density polyethylene (LDPE) and lignocellulosic fillers [wood flour (WF) and oil flax straw (FS)] selecting four size fractions of each lignocellulosic material as fillers for the composites. The primary aim was to evaluate the influence of fraction size on the composites' basic properties; to accomplish this, the composites' mechanical properties, thermal oxidation, thermophysical characteristics, and water absorption capacity were examined. Then microphotographs of the samples were created and length-to-diameter (L/D) ratio of the fillers was calculated, finding that the L/D ratio increased with increasing particle size. The particle size influenced the oxidative degradation and water absorption processes in composites with oil flax but not in those with WF. Biodegradation tests performed on the recovered soil found that the loss of mass in composites based on LDPE and FS was higher than in the same composites with WF. Moreover, at the initial stage of composting, the biodegradation rate correlated with the size of filler particles (i.e., the larger the particles, the higher the degradation rate of the biocomposite).
机译：这项研究检查了基于低密度聚乙烯（LDPE）和木质纤维素填料[木粉（WF）和亚麻亚麻（FS）]的生物复合材料，并选择了每种木质纤维素材料的四个尺寸部分作为复合材料的填料。主要目的是评估分数大小对复合材料基本性能的影响。为此，对复合材料的机械性能，热氧化，热物理特性和吸水能力进行了研究。然后创建样品的显微照片，并计算填料的长径比（L / D），发现L / D随颗粒尺寸的增加而增加。颗粒尺寸影响亚麻纤维复合材料的氧化降解和吸水过程，而白浆纤维则不影响。在回收的土壤上进行的生物降解测试发现，基于LDPE和FS的复合材料的质量损失高于具有WF的相同复合材料。而且，在堆肥的初始阶段，生物降解速率与填料颗粒的尺寸相关（即，颗粒越大，生物复合材料的降解速率越高）。

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