Soto Beobide Amaia, Bieri Rudolf, Szakács Zoltán, Sparwasser Kevin, Kaitsa Ioanna G, Georgiopoulos Ilias, Andrikopoulos Konstantinos S, Van Kerckhove Gunther, Voyiatzis George A
Foundation for Research and Technology-Hellas (FORTH), Institute of Chemical Engineering Sciences (ICE-HT), Stadiou Str., 265 04 Rio-Patras, Greece.
Stat Peel Ltd., Stampfgasse 4, CH-8750 Glarus, Switzerland.
Nanomaterials (Basel). 2024 Jan 3;14(1):120. doi: 10.3390/nano14010120.
Nanomaterials are integrated within consumer products to enhance specific properties of interest. Their release throughout the lifecycle of nano-enabled products raises concerns; specifically, mechanical strains can lead to the generation of fragmented materials containing nanomaterials. We investigated the potential release of single-walled carbon nanotubes (SWCNTs-brand TUBALL™) from epoxy composite materials. A pin-on-disk-type tribometer was used for the accelerated mechanical aging of the nanocomposites. A pristine nanocomposite material, abraded material and debris obtained from the abrasion in the tribometer were analyzed by Raman spectroscopy. The airborne-produced particles were captured using particle collectors. Stat Peel's Identifier C2 system was used to monitor the SWCNT content of respirable particles produced during the abrasion test. The SWCNT amounts found were below the LoQ. The Raman spectra conducted on the Stat Peel filters helped identify the presence of free SWCNTs released from the epoxy matrix, although they were notably scarce. Raman spectroscopy has been proved to be a crucial technique for the identification, characterization and assessment of structural changes and degradation in SWCNTs that occurred during the abrasion experiments.
纳米材料被整合到消费品中以增强特定的感兴趣特性。它们在纳米功能产品的整个生命周期中的释放引发了担忧；具体而言，机械应变会导致产生含有纳米材料的破碎材料。我们研究了环氧复合材料中单壁碳纳米管（SWCNTs - 品牌TUBALL™）的潜在释放情况。使用销盘式摩擦磨损试验机对纳米复合材料进行加速机械老化。通过拉曼光谱分析了原始纳米复合材料、从摩擦磨损试验机中磨损得到的材料和碎屑。使用颗粒收集器捕获空气中产生的颗粒。使用Stat Peel的标识符C2系统监测磨损试验期间产生的可吸入颗粒中的SWCNT含量。所发现的SWCNT量低于定量限。在Stat Peel过滤器上进行的拉曼光谱有助于识别从环氧基质中释放出的游离SWCNT的存在，尽管它们明显稀少。拉曼光谱已被证明是用于识别、表征和评估在磨损实验期间SWCNT中发生的结构变化和降解的关键技术。
