From Lab to Pilot Scale: Melt Electrospun Nanofibers of Polypropylene with Conductive Additives

Journal article
(Review article)

Publication Details

Author(s): König K, Langensiepen F, Seide G, Daenicke J, Schubert DW
Journal: Journal of Nanomaterials & Molecular Nanotechnology
Publication year: 2019
Volume: 8
Journal issue: 2
ISSN: 2324-8777


In this paper, the feasibility of fabricating polypropylene (PP)
nanofibers was investigated using conductive additives such as sodium
stearate (NaSt), sodium oleate (NaOl) and Irgastat during melt electro
spinning with a single nozzle lab and a 600- nozzle pilot scale device.
Varying PP grades of high melt flow indices (MFI=450-1200 g/10 min) were
used with different amounts of additives. The effects of the additives
on the fiber diameters, thermal properties, electrical conductivity and
polymer degradation were investigated. On a lab scale, fiber diameters
of less than 500 nm were achieved with the compound of PP HL712FB, 4 wt%
NaSt and 2 wt% Irgastat. The lab scale device was extended by a
heatable spinning chamber, which affects fiber diameter reduction. The
fabrication of nanofibers was in principle attributed to the increase in
electrical conductivity with the introduction of the additives. On a
pilot scale, the smallest fiber diameter of 6.64 μm could be achieved
with PP HL508FB and 2 wt% NaSt. The comparison between the production of
the fibers with a single nozzle and the pilot scale plant has revealed
that a transfer of results is not possible without further ado. Due to
the higher dwell time in the nozzle, a strong thermal degradation of the
polymer could be detected with the high temperature size exclusion
chromatography, whereby NaOl had the strongest influence on the thermal
degradation. The high melt flow PP HL712FB and its compounds could not
be processed with the pilot scale device due to its low viscosity,
resulting in an insufficient pressure built up within the spinneret.
Another reason for the non-spinnability of the material is the higher
thermal and mechanical stress caused by the preceding melts preparation
in an extrusion step. Further adjustments to the pilot plant are
necessary to ensure a constant temperature distribution in the nozzle
plate to achieve uniform fiber cross sections. The implementation of an
uneven collector has successfully led to an even deposition of the
fibers to obtain an isotropic non-woven fabric.

FAU Authors / FAU Editors

Daenicke, Jonas
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)
Schubert, Dirk W. Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)

External institutions
Maastricht University
Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen

How to cite

König, K., Langensiepen, F., Seide, G., Daenicke, J., & Schubert, D.W. (2019). From Lab to Pilot Scale: Melt Electrospun Nanofibers of Polypropylene with Conductive Additives. Journal of Nanomaterials & Molecular Nanotechnology, 8(2).

König, Kylie, et al. "From Lab to Pilot Scale: Melt Electrospun Nanofibers of Polypropylene with Conductive Additives." Journal of Nanomaterials & Molecular Nanotechnology 8.2 (2019).


Last updated on 2019-25-04 at 15:53