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Textile piezoelectric sensors – melt spun bi-component poly(vinylidene fluoride) fibres with conductive cores and poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) coating as the outer electrode
RISE - Research Institutes of Sweden, Swerea, Swerea IVF. University of Borås.
RISE - Research Institutes of Sweden, Swerea, Swerea IVF. Chalmers University of Technology.ORCID iD: 0000-0002-1750-8762
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.
2014 (English)In: Fashion and Textiles, ISSN 2198-0802, Vol. 1, no 13Article in journal (Refereed) Published
Abstract [en]

The work presented here addresses the outer electroding of a fully textile piezoelectric strain sensor, consisting of bi-component fibre yarns of β-crystalline poly(vinylidene fluoride) (PVDF) sheath and conductive high density polyethylene (HDPE)/carbon black (CB) core as insertions in a woven textile, with conductive poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS) coatings developed for textile applications. Two coatings, one with a polyurethane binder and one without, were compared for the application and evaluated as electrode material in piezoelectric testing, as well as tested for surface resistivity, tear strength, abrasion resistance and shear flexing. Both coatings served their function as the outer electrodes in the system and no difference in this regard was detected between them. Omission of the binder resulted in a surface resistivity one order of magnitude less, of 12.3 Ω/square, but the surface resistivity of these samples increased more upon abrasion than the samples coated with binder. The tear strength of the textile coated with binder decreased with one third compared to the uncoated substrate, whereas the tear strength of the coated textile without binder increased with the same amount. Surface resistivity measurements and scanning electron microscopy (SEM) images of the samples subjected to shear flexing showed that the coatings without the binder did not withstand this treatment, and that the samples with the binder managed this to a greater extent. In summary, both of the PEDOT:PSS coatings could be used as outer electrodes of the piezoelectric fibres, but inclusion of binder was found necessary for the durability of the coating.

Place, publisher, year, edition, pages
2014. Vol. 1, no 13
Keyword [en]
Piezoelectric sensor, PVDF, PEDOT:PSS, Textile coating
National Category
Textile, Rubber and Polymeric Materials
Identifiers
URN: urn:nbn:se:ri:diva-30182DOI: 10.1186/s40691-014-0013-6OAI: oai:DiVA.org:ri-30182DiVA: diva2:1129455
Available from: 2017-08-03 Created: 2017-08-03 Last updated: 2017-08-03

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Publisher's full texthttps://doi.org/10.1186/s40691-014-0013-6

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