Environmental transformation of multi-walled carbon nanotubes and Nano-composites

E. Sahle-Demessie, A. Zhao, A.W. Salamon
U.S. Environmental Protection Agency, US

Keywords: engineered nanomaterials

Summary:

There is a significant increase in commercial products incorporating engineered nanomaterials (ENM) over the past two decades that are now are used in electronic, cosmetics, automotive and medical products and in environmental applications. Carbon nanoparticles based materials like carbon nanotubes (CNT), carbon nanospheres chains (CNSC) and carbon nanofibers (CNF) are used for versatile carbon nanocomposite materials. Carbon Nanocomposites have been shown to possess exceptional electrical, mechanical and thermal properties, which are attractive for diverse potential applications ranging from nano-electronics to biomedical devices. This presentation is focused on UV weathering of nanocomposites and methods of characterizing structural changes and the potential of release of nanoparticles from the composite matrix. This is a highly topical subject given the increasing use of composites in structural applications in many industries including the long-term performance of composites age under conditions encountered in service which may cause deterioration of their properties and changes in their structure. These materials eventually reach the end-of-their useful life and where ENM can enter landfill as a result of commercial use and discharge. SEE ATTACHED ABSTRACT