Evaluation of nanoparticle emission for TiO2 nanopowder coating materials

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 9; no. 1; pp. 157 - 163
• Main Authors: Hsu, Li-Yeh, Chein, Hung-Min
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.01.2007
• Subjects: Emissions; Nanoparticles; Occupational health; Polymers; Protective coatings; Titanium dioxide; Ultraviolet radiation
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-006-9185-3

Issue Title: Nanoparticles and Occupational Health In this study, nanoparticle emission of TiO^sub 2^ nanopowder coated on different substrates including wood, polymer, and tile, was evaluated in a simulation box and measured with a Scanning Mobility Particle Sizer (SMPS) for the first time. The coating process for the substrate followed the instructions given by the supply company. In the simulation box, UV light, a fan, and a rubber knife were used to simulate the sun light, wind, and human contacting conditions. Among the three selected substrates, tile coated with TiO^sub 2^ nanopowder was found to have the highest particle emission (22 #/cm^sup 3^ at 55 nm) due to nanopowder separation during the simulation process. The UV light was shown to increase the release of particle below 200 nm from TiO^sub 2^ nanopowder coating materials. The results show that, under the conditions of UV lamps, a fan and scraping motion, particle number concentration or average emission rate decreases significantly after 60 and 90 min for TiO^sub 2^/polymer and TiO^sub 2^/wood, respectively. However, the emission rate continued to increase after 2 h of testing for TiO^sub 2^/tile. It is suggested that nanoparticle emission evaluation is necessary for products with nanopowder coating.[PUBLICATION ABSTRACT]