Panasiuk Katarzyna, Dudzik Krzysztof, Hajdukiewicz Grzegorz, Abramczyk Norbert
Faculty of Marine Engineering, Gdynia Maritime University, 81-225 Gdynia, Poland.
Polymers (Basel). 2024 Aug 10;16(16):2276. doi: 10.3390/polym16162276.
Recycling of composite materials is an important global issue due to the wide use of these materials in many industries. Waste management options are being explored. Mechanical recycling is one of the methods that allows obtaining polyester-glass recyclate in powder form as a result of appropriate crushing and grinding of waste. Due to the fact that the properties of composites can be easily modified by adding various types of fillers and nanofillers, this is one of the ways to improve the properties of such complex composite materials. This article presents the strength parameters of composites with the addition of fillers in the form of polyester-glass recyclate and a nanofiller in the form of gamma-phase aluminum nanopowder. To analyze the obtained results, Kolmogorov-Sinai (K-S) metric entropy was used to determine the transition from the elastic to the viscoelastic state in materials without and with the addition of nanoaluminum, during a static tensile test. The tests included samples with the addition of fillers and nanofillers, as well as a base sample without any additives. The article presents the strength parameters obtained from a testing machine during a static tensile test. Additionally, the acoustic emission method was used during the research. Thanks to which, graphs of the effective value of the electrical signal (RMS) were prepared as a function of time, the parameters were previously identified as extremely useful for analyzing the destruction process of composite materials. The values obtained from the K-S metric entropy method and the acoustic emission method were plotted on sample stretching graphs. The influence of the nanofiller and filler on these parameters was also analyzed. The presented results showed that the aluminum nanoadditive did not increase the strength parameters of the composite with recyclate as a result of the addition of aluminum nanofiller; however, its addition influenced the operational parameters, which is reflected in a 5% increase in the UTS value (from 55% to 60%).
由于复合材料在许多行业中广泛使用，其回收利用是一个重要的全球性问题。人们正在探索废物管理方案。机械回收是其中一种方法，通过对废物进行适当的破碎和研磨，可以获得粉末形式的聚酯 - 玻璃回收物。由于复合材料的性能可以通过添加各种类型的填料和纳米填料轻松改变，这是改善此类复杂复合材料性能的一种方法。本文介绍了添加聚酯 - 玻璃回收物形式的填料和γ相铝纳米粉末形式的纳米填料的复合材料的强度参数。为了分析所得结果，在静态拉伸试验中，使用Kolmogorov - Sinai（K - S）度量熵来确定在不添加和添加纳米铝的材料中从弹性状态到粘弹性状态的转变。测试包括添加了填料和纳米填料的样品以及无任何添加剂的基础样品。本文展示了在静态拉伸试验中从试验机获得的强度参数。此外，在研究过程中使用了声发射方法。由此，绘制了电信号有效值（RMS）随时间变化的图表，这些参数先前被确定为对分析复合材料的破坏过程极为有用。将从K - S度量熵方法和声发射方法获得的值绘制在样品拉伸图表上。还分析了纳米填料和填料对这些参数的影响。呈现的结果表明，由于添加铝纳米填料，铝纳米添加剂并没有提高含有回收物的复合材料的强度参数；然而，其添加影响了操作参数，这体现在UTS值增加了5%（从55%提高到60%）。
