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Melt spun piezoelectric textile fibres: an experimental study
University of Borås, Swedish School of Textiles.
2013 (English)Doctoral thesis, monograph (Other academic)
Abstract [en]

Melt Spun Piezoelectric Textile Fibres - an Experimental Study ANJA LUND Department of Materials and Manufacturing Technology Chalmers University of Technology ABSTRACT The manufacturing and characterisation of piezoelectric textile fibres are described in this thesis. A piezoelectric material is one that generates an electric voltage when deformed, a property which exists in a number of materials. The polymer with the strongest known piezoelectric effect today is poly(vinylidene fluoride) (PVDF), however it must be processed under certain conditions to become piezoelectric. This study shows that piezoelectric bicomponent PVDF-based fibres can be produced by melt spinning, which is a common and relatively simple fibre spinning method. The melt spinning process must include cold drawing, as this introduces a polar crystalline structure in the polymer. The fibres must also be electroded, which is done by producing bicomponent fibres with a core-and-sheath structure. The core is electrically conductive and constitutes an inner electrode consisting of a carbon black/polymer compound, whereas the sheath is PVDF and constitutes the piezoelectric component. Being sensitive to both deformation and temperature changes, these fibres are anticipated to be useful in a number of sensor applications. The flexibility and small size of the fibres makes it possible to include them as miniature-sensors in structures or garment without affecting the shape or comfort.

Place, publisher, year, edition, pages
Chalmers University of Technology , 2013.
Series
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, ISSN 0346-718X ; nr 3570
Keyword [en]
poly(vinylidene fluoride), PVDF, fibre, piezoelectric polymer, smart textile, melt spinning, crystal structure, X-ray diffraction of polymers, Smart textiles
National Category
Other Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
URN: urn:nbn:se:hb:diva-3661Local ID: 2320/12586ISBN: 978-91-7385-889-2 (print)OAI: oai:DiVA.org:hb-3661DiVA: diva2:877051
Note
This thesis for the Degree of Doctor of Philosophy at Chalmers University of Thechnology will be defended on September 25th 2013 at 10.00 in the Virtual Development Laboratory (VDL-room), Hörsalsvägen 7a, Göteborg.Available from: 2015-12-04 Created: 2015-12-04

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