Frącz Wiesław, Janowski Grzegorz, Smusz Robert, Szumski Marek
Department of Material Forming and Processing, Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, 35-959 Rzeszów, Poland.
Department of Thermodynamics, Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, 35-959 Rzeszów, Poland.
Polymers (Basel). 2021 Nov 14;13(22):3934. doi: 10.3390/polym13223934.
This work is inspired by the current European policies that aim to reduce plastic waste. This is especially true of the packaging industry. The biocomposites developed in the work belong to the group of environmentally friendly plastics that can reduce the increasing costs of environmental fees in the future. Three types of short fibers (flax, hemp and wood) with a length of 1 mm each were selected as fillers (30% mass content in PHBV). The biocomposites were extruded and then processed by the injection molding process with the same technical parameters. The samples obtained in this way were tested for mechanical properties and quality of the molded pieces. A significant improvement of some mechanical properties of biocomposites containing hemp and flax fibers and quality of molded pieces was obtained in comparison with pure PHBV. Only in the case of wood-PHBV biocomposites was no significant improvement of properties obtained compared to biocomposites with other fillers used in this research. The use of natural fibers, in particular hemp fibers as a filler in the PHBV matrix, in most cases has a positive effect on improving the mechanical properties and quality of molded pieces. In addition, it should be remembered that the obtained biocomposites are of natural origin and are fully biodegradable, which are interesting and desirable properties that are a part of the current trend regarding the production and commercialization of modern biomaterials.
这项工作受到当前旨在减少塑料垃圾的欧洲政策的启发。包装行业尤其如此。该工作中开发的生物复合材料属于环保塑料类别，未来可降低不断增加的环境费用成本。选择了三种长度均为1毫米的短纤维（亚麻、大麻和木材）作为填料（在聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV）中的质量含量为30%）。将生物复合材料进行挤出，然后采用相同的技术参数通过注塑工艺进行加工。对以这种方式获得的样品进行了机械性能和成型件质量测试。与纯PHBV相比，含大麻和亚麻纤维的生物复合材料的一些机械性能以及成型件质量有了显著提高。仅就木材-PHBV生物复合材料而言，与本研究中使用其他填料的生物复合材料相比，其性能没有显著改善。在大多数情况下，使用天然纤维，特别是大麻纤维作为PHBV基体中的填料，对改善成型件的机械性能和质量有积极作用。此外，应该记住，所获得的生物复合材料源于天然且完全可生物降解，这些特性既有趣又令人向往，是现代生物材料生产和商业化当前趋势的一部分。
