nanoparticle release – TechConnect Briefs

Characterization of Nanosilica Release from a Weathered Nanosilica/Polyurethane Coating

Hsueh H-C, Lu C-Y, Huang S-R, Cheng Y.L., Jacobs D., Rabb S.A., Yu L.L., Nguyen T., Sung L., National Institute of Standards and Technology, US

Polymer nanocoatings are widely used outdoor environment because the excellent properties. The addition of nanoparticles can improve performance properties including mechanical, electrical, chemical and ultraviolet resistance. However, because polymer in coating are susceptible to degradation [...]

Development of surface chemical approaches for detection and characterization of multi-walled carbon nanotubes dispersed in a polymer composite

Gorham J.M., Osborn W.A., Woodcock J.W., Scott K.C.K., Heddleston J.M., Hight Walker A.R., Gilman J.W., NIST, US

Multi-walled carbon nanotubes (MWCNT) and other carbon nanofillers are used in different applications to enhance the materials and electrical properties of consumer products as polymer composites. As a result, concern has arisen regarding the potential [...]

Multi-method analysis of multiwall carbon nanotube polymer nanocomposite after photodegradation

Petersen E.J., Lam T., Gorham J., Scott K., Long C., Sharma R., Sung L.P., Liddle J.A., Nguyen T., National Institute of Standards and Technology, US

Nanomaterials can be used as nanofillers to enhance the properties of polymeric materials. However, the effect of weathering on nanocomposites and the potential for nanomaterial release is not yet well known. This stems partly from [...]

Multi-method analysis of multiwall carbon nanotube polymer nanocomposite after photodegradation

Petersen E.J., Lam T., Gorham J., Scott K., Long C., Sharma R., Sung L.P., Liddle J.A., Nguyen T., National Institute of Standards and Technology, US

Nanomaterials can be used as nanofillers to enhance the properties of polymeric materials. However, the effect of weathering on nanocomposites and the potential for nanomaterial release is not yet well known. This stems partly from [...]

Nanoparticle Characterization and Analysis of Airborne Titanium Dioxide in Powdered Cosmetics

Cavaliere M.R., Compton S.P., MVA Scientific Consultants, US

In this study, several powdered cosmetic products were purchased and evaluated for the presence of TiO2 nanoparticles first by automated particle sizing using scanning electron microscopy (SEM) with chemical typing by energy dispersive spectroscopy (EDS) [...]

Surface Chemical Transformations of UV Irradiated Silica-Epoxy Nanocomposites

Gorham J.M., Nguyen T., Bernard C., Stanley D., Holbrook R.D., National Institute of Standards and Technology, US

Silica nanoparticles (SiNPs) incorporated into a polymeric matrix, or silica nanocomposites (NCs), are used in a wide variety of commercially available products in numerous natural and artificial environments. Environmental factors, such as ultraviolet (UV) light, [...]

Nanoparticle release quantification of sanding-induced airborne particle emissions from artificially aged/weathered nanocomposites

Goehler D., Stintz M., Technical University of Dresden, DE

Risks of substances to health, safety and environment arise by the coexistence of material toxicity and material exposure [1]. In view of the steadily increasing production, processing and use, a risk assessment of nanomaterials is [...]

Assessment of release and toxicity of NP from silicon-based polymer composites in a life cycle perspective

Irfan A., Sachse S., Njuguna J., Zhu H., Cranfield University, UK

Nanomaterial integration in public domain raises concerns regarding human health impact. This study examines the possibility of nanoparticle release from new engineered nanocomposites, using real life scenarios in life cycle analysis approach. Physical and biological [...]