Title
Dustiness and deagglomeration testing: Interlaboratory comparison of systems for nanoparticle powders
Author
Ding, Y.
Stahlmecke, B.
Jiménez, A.S.
Tuinman, I.L.
Kaminski, H.
Kuhlbusch, T.A.J.
van Tongeren, M.
Riediker, M.
Publication year
2015
Abstract
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
Subject
Observation, Weapon & Protection Systems
CBRN - CBRN Protection
TS - Technical Sciences
Nanotechnology
Air
Nanostructured materials
Powders
Hydrophobic and hydrophilic
Interlaboratory comparison
Nanoparticle powders
Number concentration
Occupational exposure
Standard operating procedures
System characteristics
Testing conditions
Aerosols
Nanomaterial
Titanium dioxide
Aerosol
Airborne particle
Airflow
Chemical reaction
Crystal structure
Deagglomeration
Dry powder
Flow rate
Fluidization
Humidity
Light scattering
Moisture
Particle size
Powder
Reproducibility
Surface property
Temperature sensitivity
Velocity
To reference this document use:
http://resolver.tudelft.nl/uuid:dae0ca0e-c56b-47ab-935f-d9c7f881c07f
DOI
https://doi.org/10.1080/02786826.2015.1114999
TNO identifier
530905
Publisher
Taylor and Francis Inc.
ISSN
0278-6826
Source
Aerosol Science and Technology, 49 (12), 1222-1231
Document type
article