Nanoaerosol emission characteristics of consumer products in an air-jet simulated test chamber

G.N. Bae, S.H. Park, S.B. Lee
Korea Institute of Science and Technology, KR

Keywords: nanoaerosol, emission, consumer product, exposure

Summary:

As nanotechnologies are developed, number of consumer products containing nanomaterials is increasing. Major categories are personal care and sports equipment, home and garden, car care products, electronics and computers. Human health and environmental effects of nanomaterials are not clearly understood. Scientific information about nanoaerosol emission during use of consumer products helps to understand safety of nanomaterials. For this purpose, we developed a small test chamber to simulate air-jet as one of severe use conditions and demonstrated emission patterns of some consumer products under the airflow conditions. Two types of air jet were applied: one was a continuous air jet and the other was a pulse air jet. Test specimen were prepared from underwear, mask, wall paper, and membrane filter. Nanoaerosols (>10 nm) emitted from the test specimen were continuously monitored using a condensation particle counter. A similar emission pattern was repeated and peak concentrations were evidently higher than background concentration in the test chamber. However, the amount of nanoaerosols detected was significantly low, considering daily exposure nanoaerosols in living environments. Pulse air jet method was more effective than continuous air jet method. This approach would contribute to setup regulations for protecting consumer exposure to nanomaterisls.