Sasimowski Emil, Majewski Łukasz, Grochowicz Marta
Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka Street, 20-618 Lublin, Poland.
Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, 33 Gliniana Street, 20-614 Lublin, Poland.
Materials (Basel). 2020 Sep 20;13(18):4182. doi: 10.3390/ma13184182.
The study investigates the effect of the content and size of wheat bran grains on selected properties of a lignocellulosic biocomposite on a polyethylene matrix. The biocomposite samples were made by injection method of low-density polyethylene with 5%, 10% and 15% by weight of wheat bran. Three bran fractions with grain sizes <0.4 mm, 0.4-0.6 mm and 0.6-0.8 mm were used. The properties of the mouldings (after primary shrinkage) were examined after their 2.5-year natural aging period. Processing properties, such as MFR (mass flow rate) and processing shrinkage, were determined. Selected physical, mechanical and structural properties of the produced biocomposite samples were tested. The results allowed the determination of the influence of both the content of bran and the size of its grains on such properties of the biocomposite as: color, gloss, processing shrinkage, tensile strength, MFR mass flow rate, chemical structure (FTIR), thermal properties (DSC, TG), p-v-T relationship. The tests did not show any deterioration of the mechanical characteristics of the tested composites after natural aging.
该研究调查了麦麸颗粒的含量和尺寸对以聚乙烯为基体的木质纤维素生物复合材料某些性能的影响。生物复合材料样品通过将低密度聚乙烯与按重量计5%、10%和15%的麦麸采用注塑法制成。使用了三种粒度分别为<0.4毫米、0.4 - 0.6毫米和0.6 - 0.8毫米的麸皮级分。在模制品经过2.5年自然老化期后，对其（初次收缩后）性能进行了检测。测定了加工性能，如熔体流动速率（MFR）和加工收缩率。对所制备的生物复合材料样品的选定物理、机械和结构性能进行了测试。结果确定了麸皮含量及其颗粒尺寸对生物复合材料如下性能的影响：颜色、光泽度、加工收缩率、拉伸强度、MFR熔体流动速率、化学结构（傅里叶变换红外光谱法）、热性能（差示扫描量热法、热重分析法）、压力 - 体积 - 温度关系。测试未显示自然老化后测试复合材料的机械特性有任何劣化。
