Release of Carbon Nanotubes from an Epoxy-Based Nanocomposite during an Abrasion Process

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• 作者：Lukas Schlagenhauf ; Bryan T. T. Chu ; Jelena Buha ; Frank Nüesch ; Jing Wang
• 刊名：Environmental Science & Technology (ES&T)
• 出版年：2012
• 出版时间：July 3, 2012
• 年：2012
• 卷：46
• 期：13
• 页码：7366-7372
• 全文大小：389K
• 年卷期：v.46,no.13(July 3, 2012)
• ISSN：1520-5851

文摘

The abrasion behavior of an epoxy/carbon nanotube (CNT) nanocomposite was investigated. An experimental setup has been established to perform abrasion, particle measurement, and collection all in one. The abraded particles were characterized by particle size distribution and by electron microscopy. The abrasion process was carried out with a Taber Abraser, and the released particles were collected by a tube for further investigation. The particle size distributions were measured with a scanning mobility particle sizer (SMPS) and an aerodynamic particle sizer (APS) and revealed four size modes for all measured samples. The mode corresponding to the smallest particle sizes of 300鈥?00 nm was measured with the SMPS and showed a trend of increasing size with increasing nanofiller content. The three measured modes with particle sizes from 0.6 to 2.5 渭m, measured with the APS, were similar for all samples. The measured particle concentrations were between 8000 and 20鈥?00 particles/cm³ for measurements with the SMPS and between 1000 and 3000 particles/cm³ for measurements with the APS. Imaging by transmission electron microscopy (TEM) revealed that free-standing individual CNTs and agglomerates were emitted during abrasion.