Biomedical Engineering Reference
In-Depth Information
TABLE 13.4 (
continued
)
Publications Describing Scenarios Related to Source Domain 4
Observed NM
Release
Reference
Scenario
Nanomaterial
Metric
Summary/Conclusions
Sachse et al.
(2013)
High energy
impact
Nanoclays
Silica
No
PNC, PSD
(5.6-1,083 nm)
Particulate emissions were evaluated based on size-resolved
from various silica based composites during impacting
process. Physical characterization of the number concentration
and size distribution of sub-micron particles from 5.6 to 512
nm was carried out, for the different composites. In general,
nano and ultraine airborne particles were emitted from all
investigated materials. However, composite illed with
nanoclay emitted higher amounts of particles than those illed
with nano and microsilica. One reason for the increase of
particle emission of the nanoclay illed composites was the
change of the failure behaviour of the matrix. Nanoclay
induced a transition from ductile to brittle fracture. Brittle
material behavior results in fracture of material in many pieces
and a low deformation, and hence more particles were
generated.
However similar results of particle emission were obtained for
both nano and microsilica illers, which in general did not vary
signiicantly from the results obtained from traditionally
reinforced glass iber polymer composites
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