Dustiness and Deagglomeration Testing: Interlaboratory Comparison of Systems for Nanoparticle Powders
| Autor: | Araceli Sánchez Jiménez, Yaobo Ding, Martie van Tongeren, Ilse Tuinman, Michael Riediker, Heinz Kaminski, Burkhard Stahlmecke, Thomas A. J. Kuhlbusch |
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| Rok vydání: | 2015 |
| Předmět: |
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Nanoparticle Number concentration Nanotechnology Testing conditions General Materials Science Process engineering Aerosolization Fluidization TS - Technical Sciences Moisture Air Surface property Dry powder Nanostructured materials Particle size Occupational exposure Nanomaterial Observation Weapon & Protection Systems System characteristics Pollution Reproducibility Nanoparticles Particle Size Aerosols Powders Deagglomeration Chemical reaction Airflow Flow rate Powder Interlaboratory comparison Environmental Chemistry Hydrophobic and hydrophilic Aerosol business.industry Crystal structure CBRN - CBRN Protection Light scattering Humidity Nanoparticle powders Standard operating procedures Titanium dioxide Environmental science business Temperature sensitivity Airborne particle |
| Zdroj: | Aerosol Science and Technology, vol. 49, no. 12, pp. 1222-1231 Aerosol Science and Technology, 12, 49, 1222-1231 |
| ISSN: | 1521-7388 0278-6826 |
| Popis: | Different types of aerosolization and deagglomeration testing systems exist for studying the properties of nanomaterial powders and their aerosols. However, results are dependent on the specific methods used. In order to have well-characterized aerosols, we require a better understanding of how system parameters and testing conditions influence the properties of the aerosols generated. In the present study, four experimental setups delivering different aerosolization energies were used to test the resultant aerosols of two distinct nanomaterials (hydrophobic and hydrophilic TiO2). The reproducibility of results within each system was good. However, the number concentrations and size distributions of the aerosols created varied across the four systems; for number concentrations, e.g., from 103 to 106 #/cm3. Moreover, distinct differences were also observed between the two materials with different surface coatings. The article discusses how system characteristics and other pertinent conditions modify the test results. We propose using air velocity as a suitable proxy for estimating energy input levels in aerosolization systems. The information derived from this work will be especially useful for establishing standard operating procedures for testing nanopowders, as well as for estimating their release rates under different energy input conditions, which is relevant for occupational exposure. © 2015 American Association for Aerosol Research. Chemicals/CAS: titanium dioxide, 1317-70-0, 1317-80-2, 13463-67-7, 51745-87-0 |
| Databáze: | OpenAIRE |
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