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Document Type : Original Article


1 Department of Textile Engineering, Isfahan University of Technology, Isfahan, Iran.

2 Textile Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.

3 Fabric Design Department, Faculty of Applied Arts, University of Art, Tehran, Iran.


The present study attempts to combine the properties
of natural and synthetic fibers by using nanotechnology.
Considering the potential of nylon nanofiber structures in some
applications such as controlled drug release, moisture microsensors
and antibacterial filters, the moisture absorption of the
nanofibers could be improved via using biocompatible natural
fibers such as wool. In this investigation, it was achieved to
produce yarns of composite nylon 6 nanofibers, incorporating
wool nanoparticles (WNPs), via electrospinning. WNPs were
added to the electrospinning solution of nylon 6 in various
concentrations. Scanning electron microscopy was employed
to characterize the morphology of composite nanofibers.
The existence of WNPs in the nanofibers was confirmed by
transmission electron microscopy. Fourier transform infrared
spectroscopy (FTIR) spectra showed that nanofibrous
composite formation did not influence the chemical bonds of
both the wool nanoparticles and nylon 6, and no new steady
bonds were formed. It was found that an increase in the
WNPs concentration increased the diameter of composite
nanofibers from 152±16 nm (pure nanofibers) to 266±51 nm
(7 wt% nanoparticles). The assessment of moisture regain
of composite nanofiber yarns showed that the moisture
absorption of nylon 6 nanofibers improved by introducing the
WNPs as hydrophilic components. The moisture regain of the composite nanofibers yarn containing 7 wt% nanoparticles
was found to be higher than that of the pure nanofibers yarn
by about 117.1%. On the other hand, tensile strength and
elongation-at-break of composite nanofiber yarns initially
decreased and then increased with the increase in WNPs