Next Article in Journal
Remote Health Care Provision in Care Homes in England: An Exploratory Mixed Methods Study of Yorkshire and the Humber
Previous Article in Journal
Stability and Delay of NDMA-MPR Protocol in Rice-Correlated Channels with Co-Channel Interference
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessCommunication

Wet Relaxation of Electrospun Nanofiber Mats

Faculty of Engineering and Mathematics, ITES, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany
Author to whom correspondence should be addressed.
Technologies 2019, 7(1), 23;
Received: 29 January 2019 / Revised: 11 February 2019 / Accepted: 12 February 2019 / Published: 15 February 2019
(This article belongs to the Section Innovations in Materials Processing)
PDF [3257 KB, uploaded 15 February 2019]


Electrospinning can be used to produce nanofiber mats. One of the often used polymers for electrospinning is polyacrylonitrile (PAN), especially for the production of carbon nanofibers, but also for a diverse number of other applications. For some of these applications—e.g., creation of nano-filters—the dimensional stability of the nanofiber mats is crucial. While relaxation processes—especially dry, wet and washing relaxation—are well-known and often investigated for knitted fabrics, the dimensional stability of nanofiber mats has not yet been investigated. Here we report on the wet relaxation of PAN nanofiber mats, which are dependent on spinning and solution parameters such as: voltage, electrode distance, nanofiber mat thickness, and solid content in the solution. Our results show that wet relaxation has a significant effect on the samples, resulting in a dimensional change that has to be taken into account for nanofiber mats in wet applications. While the first and second soaking in pure water resulted in an increase of the nanofiber mat area up to approximately 5%, the dried sample, after the second soaking, conversely showed an area reduced by a maximum of 5%. For soaking in soap water, small areal decreases between approximately 1–4% were measured. View Full-Text
Keywords: electrospinning; filter; wet relaxation; dimensions; polyacrylonitrile (PAN) electrospinning; filter; wet relaxation; dimensions; polyacrylonitrile (PAN)

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Grothe, T.; Sabantina, L.; Klöcker, M.; Junger, I.J.; Döpke, C.; Ehrmann, A. Wet Relaxation of Electrospun Nanofiber Mats. Technologies 2019, 7, 23.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Technologies EISSN 2227-7080 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top