Release from Composites by Mechanical and Thermal Treatment - Safety of Nanomaterials along Their Lifecycle - page 261

9.9 m

Work
bench

Tool box

CC C

Sink

1.8 m

C

Drilling
machine

Band saw

HP

Diamond
saw

1.8 m

CC

HP

Vent
trunk

1 m

C: Cabinet
HP: Hydraulic pump

7.3 m

(a)

Drill stage

Diamond drill

Sample

45° 45°

10 cm 25 cm

Real-time
instruments WRASS,

CPC 3007

Operator

(b)

FIGURE 12.11 Schematic of the laboratory depicting the location of the drilling machine
(a) and schematics of sampler arrangement for drilling and the drill stage (b). (Adapted from
Bello, D. et al. (2009b), Exposures to nanoscale particles and fibers during handling, pro-
cessing, and machining of nanocomposites and nanoengineered composites reinforced with
aligned carbon nanotubes, International Committee on Composite Materials 17, Edinburgh,
Scotland.)

(TP), and a wide range aerosol spectrometer system (WRASS). Additionally, particles
were sampled using a precipitator and subsequently analyzed by electron microscopy.
The results showed that drilling may generate substantial exposure to nanoscale
and submicron particles, in which higher exposures tend to be generated at higher