Change search
Link to record
Permanent link

Direct link
BETA
Publications (6 of 6) Show all publications
Lund, A., Rundqvist, K., Nilsson, E., Yu, L., Hagström, B. & Müller, C. (2018). Energy harvesting textiles for a rainy day: woven piezoelectrics based on melt-spun PVDF microfibres with a conducting core. npj Flexible Electronics, 2, Article ID 9.
Open this publication in new window or tab >>Energy harvesting textiles for a rainy day: woven piezoelectrics based on melt-spun PVDF microfibres with a conducting core
Show others...
2018 (English)In: npj Flexible Electronics, Vol. 2, article id 9Article in journal (Refereed) Published
Abstract [en]

Recent advances in ubiquitous low-power electronics call for the development of light-weight and flexible energy sources. The textile format is highly attractive for unobtrusive harvesting of energy from e.g., biomechanical movements. Here, we report the manufacture and characterisation of fully textile piezoelectric generators that can operate under wet conditions. We use a weaving loom to realise textile bands with yarns of melt-spun piezoelectric microfibres, that consist of a conducting core surrounded by β-phase poly(vinylidene fluoride) (PVDF), in the warp direction. The core-sheath constitution of the piezoelectric microfibres results in a—for electronic textiles—unique architecture. The inner electrode is fully shielded from the outer electrode (made up of conducting yarns that are integrated in the weft direction) which prevents shorting under wet conditions. As a result, and in contrast to other energy harvesting textiles, we are able to demonstrate piezoelectric fabrics that do not only continue to function when in contact with water, but show enhanced performance. The piezoelectric bands generate an output of several volts at strains below one percent. We show that integration into the shoulder strap of a laptop case permits the continuous generation of four microwatts of power during a brisk walk. This promising performance, combined with the fact that our solution uses scalable materials and well-established industrial manufacturing methods, opens up the possibility to develop wearable electronics that are powered by piezoelectric textiles.

Keywords
Electrical and electronic engineering, Energy harvesting, Materials for devices
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:ri:diva-34718 (URN)10.1038/s41528-018-0022-4 (DOI)
Available from: 2018-08-15 Created: 2018-08-15 Last updated: 2018-08-15Bibliographically approved
Nilsson, E., Hagström, B. & Rössler, J. (2016). Electrically conductive fibres - recent development. In: : . Paper presented at 55th Man Made fibre Congress 2016, 20-22 september, 2016, Dornbirn, Österrike.
Open this publication in new window or tab >>Electrically conductive fibres - recent development
2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-30233 (URN)
Conference
55th Man Made fibre Congress 2016, 20-22 september, 2016, Dornbirn, Österrike
Available from: 2017-08-08 Created: 2017-08-08 Last updated: 2019-06-20Bibliographically approved
Nilsson, E., Rigdahl, M. & Hagström, B. (2015). Electrically conductive polymeric bi-component fibers containing a high load of low-structured carbon black (ed.). Journal of Applied Polymer Science, 132(29), Article ID 42255.
Open this publication in new window or tab >>Electrically conductive polymeric bi-component fibers containing a high load of low-structured carbon black
2015 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 132, no 29, article id 42255Article in journal (Refereed) Published
Abstract [en]

Melt spinning at semi-industrial conditions of carbon black (CB) containing textiles fibers with enhanced electrical conductivity suitable for heating applications is described. A conductive compound of CB and high density polyethylene (HDPE) was incorporated into the core of bi-component fibers which had a sheath of polyamide 6 (PA6). The rheological and fiber-forming properties of a low-structured and a high-structured CB/HDPE composite were compared in terms of their conductivity. The low-structured CB gave the best trade-off between processability and final conductivity. This was discussed in terms of the strength of the resulting percolated network of carbon particles and its effect on the spin line stability during melt spinning. The conductivity was found to be further enhanced with maintained mechanical properties by an in line thermal annealing of the fibers at temperatures in the vicinity of the melting point of HDPE. By an adequate choice of CB and annealing conditions a conductivity of 1.5 S/cm of the core material was obtained. The usefulness of the fibers for heating applications was demonstrated by means of a woven fabric containing the conductive fibers in the warp direction. By applying a voltage of 48 V the surface temperature of the fabric rose from 20 to 30°C.

Place, publisher, year, edition, pages
John Wiley and Sons Inc., 2015
Keywords
composites, conducting polymers, fibers, graphene and fullerenes, nanotubes
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-13312 (URN)10.1002/app.42255 (DOI)2-s2.0-84929050556 (Scopus ID)
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2019-07-03Bibliographically approved
Andersson, D., Nilsson, E. & Wetter, G. (2015). Interconnection of electrically conductive fibersfor application in smart textiles. In: : . Paper presented at in Proceedings of the SMTA Pan Pacific Microelectronics Symposium, Pan Pacific, January 25-28.
Open this publication in new window or tab >>Interconnection of electrically conductive fibersfor application in smart textiles
2015 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-30246 (URN)
Conference
in Proceedings of the SMTA Pan Pacific Microelectronics Symposium, Pan Pacific, January 25-28
Available from: 2017-08-09 Created: 2017-08-09 Last updated: 2019-05-15Bibliographically approved
Nilsson, E., Oxfall, H., Wandelt, W., Rychwalski, R. & Hagström, B. (2013). Melt spinning of conductive textile fibers with hybridized graphite nanoplatelets and carbon black filler (ed.). Journal of Applied Polymer Science, 130(4), 2579-2587
Open this publication in new window or tab >>Melt spinning of conductive textile fibers with hybridized graphite nanoplatelets and carbon black filler
Show others...
2013 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 130, no 4, p. 2579-2587Article in journal (Refereed) Published
Abstract [en]

In this study, two different carbon fillers: carbon black (CB) and graphite nanoplatelets (GNP) are studied as conductive fillers for the preparation of conductive polypropylene (PP) nanocomposites. In order to obtain a homogenous dispersion of GNP, GNP/PP composites were prepared by two different methods: solid state mixing (SSM) and traditional melt mixing (MM). The result shows that MM is more efficient in the dispersion of GNP particles compared to SSM method. PP nanocomposites containing only one conductive filler and two fillers were prepared at different filler concentrations. Based on the analysis of electrical and rheological properties of the prepared nanocomposites, it shows that a hybridized composite with equal amounts of GNP and CB has favorable processing properties. Conductive fibers with a core/sheath structure were produced on a bicomponent melt spinning line. The core materials of these fibers are the hybridized GNP/CB/PP nanocomposite and the sheath is pure polyamide. It was found that GNPs were separated during melt and cold drawing which results in the decrease of conductivity. However, the conductivity could partly be restored by the heat treatment. © 2013 Wiley Periodicals, Inc.

Keywords
conducting polymers, fibers, graphene and fullerenes, manufacturing, nanotubes, textiles
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-13325 (URN)10.1002/app.39480 (DOI)2-s2.0-84883050196 (Scopus ID)
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2019-06-28Bibliographically approved
Nilsson, E., Oxfall, H., Wandelt, W., Rychwalski, R. & Hagström, B. (2012). Electrically conductive textile fibres with hybridized graphite nanoplatelets and carbon black filler. In: : . Paper presented at Nordic polymer days, May 29-31, Copenhagen, Denmark.
Open this publication in new window or tab >>Electrically conductive textile fibres with hybridized graphite nanoplatelets and carbon black filler
Show others...
2012 (English)Conference paper, Oral presentation only (Other academic)
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:ri:diva-34238 (URN)
Conference
Nordic polymer days, May 29-31, Copenhagen, Denmark
Available from: 2018-07-18 Created: 2018-07-18 Last updated: 2019-06-28Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1950-8762

Search in DiVA

Show all publications
v. 2.35.9