Authors: M. Kovochich, R. Avanasi, A.K. Madl
Affilation: ChemRisk, United States
Pages: 485 - 488
Keywords: nanocomposites, carbon nanotubes, releasability
Carbon nanotubes (CNTs)in composites are currently being used in applications ranging from basic consumer goods to critical national defense technologies; however, concerns have been raised regarding the potential for exposure and health risk CNTs due to comparisons to other high aspect ratio fibers. For these reasons, assessing the release of CNTs from composites is paramount in understanding the potential exposure scenarios that may occur during handling and manipulation of the product. We hypothesized that the physical and chemical interactions between CNTs and the composite matrix, as well as settings in which nanocomposites are handled will influence the release of these nanomaterials. We analyzed available data on the release of CNTs from different composites as a result of various stressors. The data indicate that physical, chemical, and environmental factors can affect the release of CNTs from nanocomposites including the location of the CNTs within the matrix, the chemical and physical bonding between the CNTs and the matrix, as well as the physical stress applied to the matrix. Understanding the factors that play a role in the release of CNTs will aid in technological development and safe handling of nanocomposites while minimizing any potential health risks.