Bazan Patrycja, Jacobsen Elisabeth Egholm, Olsen Anna, Paso Kristofer Gunnar
Faculty of Material Engineering and Physics, Cracow University of Technology, 31-155 Krakow, Poland.
Department of Chemistry, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
Polymers (Basel). 2025 Jun 3;17(11):1559. doi: 10.3390/polym17111559.
In this study, composites were developed using a biopolyamide matrix modified with microsilica at varying concentrations (0.5-2% by weight). These composites underwent water absorption analysis, and diffusion velocity was assessed. Based on the findings, hybrid composites incorporating aramid, basalt, and carbon fibers, further modified with 2% microsilica by weight, were fabricated. Investigations into fundamental mechanical properties, microstructure analysis, and accelerated fatigue tests were conducted. The results demonstrate that microsilica positively influences the enhancement of fatigue strength and mechanical properties of the composites. Specifically, microsilica is found to increase the approximate fatigue strength by 15% for the base material modified with 2 wt.% microsilica, by approximately 5% for composites with aramid fiber, and by between 10 and 15% for composites with basalt and carbon fiber. Furthermore, the incorporation of microsilica reduces water absorption in polymer composites, potentially enhancing their durability in humid environments and increasing resistance to degradation.
在本研究中，使用不同浓度（按重量计0.5 - 2%）的微硅粉改性的生物聚酰胺基体开发了复合材料。对这些复合材料进行了吸水性分析，并评估了扩散速度。基于这些发现，制备了包含芳纶、玄武岩和碳纤维且进一步用2%（按重量计）微硅粉改性的混杂复合材料。进行了基本力学性能研究、微观结构分析和加速疲劳试验。结果表明，微硅粉对复合材料疲劳强度和力学性能的增强有积极影响。具体而言，对于用2 wt.%微硅粉改性的基体材料，微硅粉使近似疲劳强度提高约15%；对于含芳纶纤维的复合材料，提高约5%；对于含玄武岩和碳纤维的复合材料，提高10%至15%。此外，微硅粉的加入降低了聚合物复合材料的吸水性，可能提高其在潮湿环境中的耐久性并增强抗降解能力。
