Birch M Eileen, Ruda-Eberenz Toni A, Chai Ming, Andrews Ronnee, Hatfield Randal L
US Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Applied Research and Technology, MS-R7 4676 Columbia Parkway, Cincinnati, OH 45226, USA;
Ann Occup Hyg. 2013 Nov;57(9):1148-66. doi: 10.1093/annhyg/met042. Epub 2013 Sep 12.
Commercially available carbon nanotubes and nanofibers were analyzed to examine possible relationships between their Brunauer-Emmett-Teller specific surface areas (SSAs) and their physical and chemical properties. Properties found to influence surface area were number of walls/diameter, impurities, and surface functionalization with hydroxyl and carboxyl groups. Characterization by electron microscopy, energy-dispersive X-ray spectrometry, thermogravimetric analysis, and elemental analysis indicates that SSA can provide insight on carbon nanomaterials properties, which can differ vastly depending on synthesis parameters and post-production treatments. In this study, how different properties may influence surface area is discussed. The materials examined have a wide range of surface areas. The measured surface areas differed from product specifications, to varying degrees, and between similar products. Findings emphasize the multiple factors that influence surface area and mark its utility in carbon nanomaterial characterization, a prerequisite to understanding their potential applications and toxicities. Implications for occupational monitoring are discussed.
对市售的碳纳米管和纳米纤维进行了分析，以研究其布鲁诺尔-埃米特-特勒比表面积（SSA）与物理和化学性质之间可能存在的关系。发现影响表面积的性质包括壁数/直径、杂质以及羟基和羧基的表面官能化。通过电子显微镜、能量色散X射线光谱法、热重分析和元素分析进行的表征表明，SSA可以提供有关碳纳米材料性质的见解，这些性质会因合成参数和生产后处理的不同而有很大差异。在本研究中，讨论了不同性质如何影响表面积。所研究的材料具有广泛的表面积范围。测量的表面积在不同程度上与产品规格不同，并且在相似产品之间也存在差异。研究结果强调了影响表面积的多种因素，并表明其在碳纳米材料表征中的实用性，这是理解其潜在应用和毒性的先决条件。还讨论了对职业监测的影响。
