Quantification of Nanoparticle Release from Polymer Nanocomposite Coatings due to Environmental Stressing
Yeon S. Kim, Nasir M. Uddin, Marc R. Nyden, Richard H. Harris Jr., Savelas A. Rabb, Rick D. Davis
Certain engineered nanoparticles (ENP) reduce the flammability of components used in soft furnishings (mattresses and upholstered furniture). Most commonly these ENPs are montmorillonite clay (MMTs), multi-walled carbon nanotube (MWCNTs) and carbon nanofiber (CNFs). The soft furnishing components are barrier fabrics (BF) and flexible polyurethane foams (PUF). However, because of the ENPs small size and ability to interact with biological molecules, these fire retardant ENPs could pose a health and environmental risks if they are released during the life cycle of the soft furnishing. Quantifying the release amounts of these ENPs under normal end-use circumstances would provide a basis for assessing their health and environmental impact. In this manuscript, we report on our efforts to identify suitable methodologies for quantifying the release of MMTs, MWCNTs, and CNFs from thin films/coatings applied to the surfaces of BF and PUF. The ENPs released in simulated chewing and mechanical stressing experiments were collected in aqueous solution and quantified using Ultraviolet-Visible and inductively coupled plasmaoptical emission spectroscopy. The microstructures of the released ENPs were characterized using scanning electron microscopy. We believe the reported methodology and results will provide important milestones to estimate the impact and toxicity of the ENP release during the life cycle of the nanocomposites.
, Uddin, N.
, Nyden, M.
, Harris, R.
, Rabb, S.
and Davis, R.
Quantification of Nanoparticle Release from Polymer Nanocomposite Coatings due to Environmental Stressing, Environmental Science & Technology, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916050
(Accessed December 7, 2021)