Release-ability of nano fillers from different nanomaterials

L. Golanski, M. Pras, A. Guiot, F. Tardif
CEA-Grenoble, FR

Keywords: nanoparticle release, EHS

Summary:

The nanoparticles are finding new industrial applications every day in fields as diverse as electronics, biomedicine, pharmaceutics, cosmetology, chemical catalysis, new materials, and others. Nevertheless, this new industry can develop dynamically only if the safety issues are solved during all the life cycle long of the nano products: from fabrication to the end of life through usage. Due to the complexity of the nano toxicology, it will probably take decades to identify the dangerous nanoparticles and even a longer time to declare some of the nanoparticles as benign. One of the pragmatic ways to secure the nanomaterials today consists in reducing the exposure to nanoparticles of the potentially exposed workers, the consumers and the Environment close to zero. It is of great interest to set up a reproducible and sensitive method able to qualify nanomaterials before their market introduction in terms of their constitutive nanoparticle release-ability in usage. The objective of developing such measurement techniques is double: optimization of the “hooking” of the nanoparticles in the matrix and perhaps one day, qualifying the nano products before any market introduction. During the last years, CEA developed different methods to evaluate the releaseability of nanoparticles from nano products by wet and dry abrasions in order to mimic realistic solicitations in use. The objective of developing such measurement techniques is double: optimization of the “hooking” of the nanoparticles in the matrix and perhaps one day, qualifying the nano products before market introduction. This paper reviews the mechanisms able to induce release, points up the progresses regarding the methodologies for release quantification. Latest results in this field obtained at CEA in the frame of the Nanohouse project concerning nano-based paints and coatings products for facades are pointed out.