Tarrés Quim, Hernández-Díaz David, Ardanuy Mònica
Departament of Materials Science ande Engineering, Universitat Politècnica de Catalunya (UPC), Colom 1, 08222 Terrassa, Spain.
Serra Húnter Programme, Department of Engineering Graphics and Design, Universitat Politècnica de Catalunya, TR5 Campus Terrassa, 08222 Terrassa, Spain.
Polymers (Basel). 2021 Mar 1;13(5):768. doi: 10.3390/polym13050768.
Stiffness of material is a key parameter that allows the use of material for structural or semi-structural purposes. Besides, lightweight materials are increasingly calling the attention of the industry. Environmental impact is also increasing in its importance. Bio-based materials produced from renewable sources can be good candidates for structural purposes combining lightweight and low environmental impact. Nonetheless, similar mechanical properties of commodities have to be reached with such materials. In this work, composite materials from corn stover fibers as a bio-polyethylene reinforcement were produced and tested. The effect of coupling agents to improve the fiber-matrix interface has been evaluated. It has been found that coupling agent content influenced the stiffness of the materials, increasing the Young's modulus and the material processability. The best performance was achieved for a 6% of coupling agent, corresponding to 4.61 GPa for 50 % of corn stover fibers. Micromechanics showed the impact of the semi-random orientation of the fibers and the lesser impact of its morphology. It was possible to determine a triangular packing of the composites as a hypothesis for future research.
材料的刚度是允许将材料用于结构或半结构用途的关键参数。此外，轻质材料越来越受到行业的关注。环境影响的重要性也在增加。由可再生资源生产的生物基材料可能是结合轻质和低环境影响的结构用途的良好候选材料。尽管如此，此类材料必须具备与商品相似的机械性能。在这项工作中，制备并测试了以玉米秸秆纤维作为生物聚乙烯增强材料的复合材料。评估了偶联剂对改善纤维-基体界面的效果。已发现偶联剂含量会影响材料的刚度，提高杨氏模量和材料的加工性能。对于6%的偶联剂，50%的玉米秸秆纤维对应的杨氏模量为4.61 GPa时，性能最佳。微观力学表明纤维半随机取向的影响以及其形态的影响较小。作为未来研究的假设，可以确定复合材料的三角堆积结构。
