Przekop Robert E, Gabriel Ewa, Dobrosielska Marta, Martyła Agnieszka, Jakubowska Paulina, Głowacka Julia, Marciniak Piotr, Pakuła Daria, Jałbrzykowski Marek, Borkowski Grzegorz
Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, 10 Uniwersytetu Poznańskiego, 61-614 Poznań, Poland.
Faculty of Materials Science and Engineering Warsaw, University of Technology, 141 Wołoska, 02-507 Warsaw, Poland.
Polymers (Basel). 2023 Jun 26;15(13):2817. doi: 10.3390/polym15132817.
In this study, composites containing polylactide and carbonate lake sediment in concentrations of 2.5, 5, 10, and 15% by weight were prepared by a 3D printing method. The material for 3D printing was obtained by directly diluting the masterbatch on an injection moulder to the desired concentrations, and after granulation, it was extruded into a filament. The material prepared thusly was used to print standardised samples for mechanical testing. To compare the mechanical properties of the composites obtained by 3D printing and injection moulding, two sets of tests were performed, i.e., mechanical tests (tensile strength, flexural strength, and impact strength) and hydrophobic-hydrophilic surface character testing. The degree of composite waste in the 3D printing was also calculated. Mechanical and surface tests were performed for both systems conditioned at room temperature and after accelerated ageing in a weathering chamber. The study showed differences in the properties of composites obtained by 3D printing. Sedimentary fillers improved the hydrophobicity of the systems compared with pure PLA, but it was not a linear relationship. The PLA/CLS sedB composite had higher strength parameters, especially after ageing in a weathering chamber. This is due to its composition, in which, in addition to calcite and silica, there are also aluminosilicates, causing a strengthening of the PLA matrix.
在本研究中，采用3D打印方法制备了含有聚乳酸和碳酸盐湖沉积物的复合材料，其重量浓度分别为2.5%、5%、10%和15%。3D打印材料是通过在注塑机上将母料直接稀释至所需浓度而获得的，造粒后，将其挤出成丝状。如此制备的材料用于打印标准化样品以进行力学测试。为了比较通过3D打印和注塑成型获得的复合材料的力学性能，进行了两组测试，即力学测试（拉伸强度、弯曲强度和冲击强度）和疏水-亲水性表面特性测试。还计算了3D打印中的复合材料废料程度。对在室温下以及在老化试验箱中加速老化后的两个系统都进行了力学和表面测试。研究表明通过3D打印获得的复合材料的性能存在差异。与纯聚乳酸相比，沉积填料提高了系统的疏水性，但这不是线性关系。聚乳酸/碳酸盐湖沉积物sedB复合材料具有更高强度参数，尤其是在老化试验箱中老化后。这归因于其组成，其中除了方解石和二氧化硅外，还有铝硅酸盐，导致聚乳酸基体强化。
