Ziąbka Magdalena, Dziadek Michał
Department of Ceramics and Refractories, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Krakow, Poland.
Department of Glass Technology and Amorphous Coatings, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Krakow, Poland.
Materials (Basel). 2021 Jan 13;14(2):361. doi: 10.3390/ma14020361.
Three types of thermoplastic polymers, acrylonitrile butadiene styrene (ABS), polymethyl methacrylate acrylic (PMMA) and high-density polyethylene (HDPE), were enriched with silver nanoparticles (AgNPs) of 0.5 wt.% and 1.0 wt.%, respectively. The polymers and the composites were manufactured via injection molding. Regarding the potential of these polymers as matrices for long-term use as biomaterials, the aim of this study was to examine their stability in the in vitro conditions during a three-year incubation period in deionized water. In this work, microstructural observations were performed, and mechanical properties were assessed. Surface parameters, such as roughness and contact angle, were comprehensively investigated. The microstructural evaluation showed that the silver additive was homogeneously dispersed in all the examined matrices. The 36-month immersion period indicated no microstructural changes and proved the composites' stability. The mechanical tests confirmed that the composites retained comparable mechanical properties after the silver incorporation. The Young's modulus and tensile strength increased during long-term incubation. The addition of silver nanoparticles did not alter the composites' roughness. The contact angle increased with the rising AgNP content. It was also shown that the materials' roughness increased with the incubation time, especially for the ABS- and HDPE-based materials. The water environment conditions improved the wettability of the tested materials. However, the silver nanoparticles' content resulted in the contact angle decreasing during incubation. The conducted studies confirmed that the mechanical properties of all the polymers and composites did not deteriorate; thus, the materials may be considered stable and applicable for long-term working periods in aqueous environments.
三种热塑性聚合物，即丙烯腈-丁二烯-苯乙烯共聚物（ABS）、聚甲基丙烯酸甲酯（PMMA）和高密度聚乙烯（HDPE），分别用0.5 wt.%和1.0 wt.%的银纳米颗粒（AgNP）进行了增强。这些聚合物及其复合材料通过注塑成型制备。考虑到这些聚合物作为长期生物材料基体的潜力，本研究的目的是考察它们在去离子水中三年培养期的体外条件下的稳定性。在这项工作中，进行了微观结构观察并评估了力学性能。对表面参数，如粗糙度和接触角进行了全面研究。微观结构评估表明，银添加剂在所有测试基体中均匀分散。36个月的浸泡期表明没有微观结构变化，证明了复合材料的稳定性。力学测试证实，加入银后复合材料保留了相当的力学性能。长期培养过程中，杨氏模量和拉伸强度增加。银纳米颗粒的加入没有改变复合材料的粗糙度。接触角随AgNP含量的增加而增大。还表明，材料的粗糙度随培养时间增加，特别是对于基于ABS和HDPE的材料。水环境条件改善了测试材料的润湿性。然而，银纳米颗粒的含量导致培养过程中接触角减小。所进行的研究证实，所有聚合物和复合材料的力学性能没有恶化；因此，这些材料可被认为是稳定的，适用于在水环境中的长期工作。
