underway, the parameters presented

underway, the parameters presented here being chosen to
illustrate the potential of our practical concept of rotary-jet
spinning for obtaining thin fibers and depositing them under
the form of porous membranes.
At a first glance, the SEM images have revealed in all
cases the formation of a highly porous matrix constructed
from entangled and interlocked fibers disposed in more or
less random directions (Figures 4-7). Also, unlike the results
of a typical technique, fibers obtained here are very smooth
and coalescence is partially avoided due to the continuous
air flow provided during deposition. However, the fiber
diameter distribution is still relative large and non-uniform,
in agreement with the results of traditional spinning techniques
[17,22]. In addition, the general presentation of deposition
mats, and fibers diameters that generally varies between
around 100 nm and several micrometers, are appropriate
with those just reported [16] in the case of rotary-jet spinning
of poly(butylene terephthalate) melts at very high speeds and
temperatures (1-5×104 rpm; ~ 300 oC).
The morphology of gelatin mats, as illustrated in Figure
4(a), is the results of a combination between high numbers
of relatively straight, loosely oriented fibers and bunches of
random, irregular and generally thinner fibers, together with