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Influence of coating parameters on textile and electrical properties of a poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate)/polyurethane-coated textile
University of Borås, Swedish School of Textiles. (Textile Materials Technology)
University of Borås, Swedish School of Textiles. (Textile Materials Technology)
2013 (English)In: Textile research journal, ISSN 0040-5175, E-ISSN 1746-7748, Vol. 83, no 20, 1-13 p.Article in journal (Refereed)
Sustainable development
The content falls within the scope of Sustainable Development
Abstract [en]

Textile coatings with electrical conductivity were obtained by the addition of poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS) and ethylene glycol (EG) to a polyurethane (PU)-based coating formulation. Variations of the coating formulation, the coating amount and the drying conditions, as well as the absence of an annealing step, were investigated. The coated fabrics were evaluated for tear strength and bending rigidity as well as surface resistivity and appearance before and after Martindale abrasion. A high proportion of PEDOT:PSS dispersion in the formulation and the presence of EG provided low surface resistivity. This composition resulted in softer samples with higher tear strength than those containing more PU-binder. All coatings proved to withstand abrasion to a similar extent. The surface resistivity increased gradually with the abrasion, about one half order of magnitude, except for those coatings that had been subjected to a faster drying process, where the surface resistivity increased somewhat faster.

Place, publisher, year, edition, pages
Sage Publications Ltd. , 2013. Vol. 83, no 20, 1-13 p.
Keyword [en]
Textile technology, Smart Textiles
National Category
Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
URN: urn:nbn:se:hb:diva-1625DOI: 10.1177/0040517513487786ISI: 000327372700006Local ID: 2320/12715OAI: oai:DiVA.org:hb-1625DiVA: diva2:869694
Note

Sponsorship:

Sparbanksstiftelsen Sjuhärad, Smart Textiles

Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2015-12-18
In thesis
1. Electrically conductive textile coatings with PEDOT:PSS
Open this publication in new window or tab >>Electrically conductive textile coatings with PEDOT:PSS
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In smart textiles, electrical conductivity is often required for several functions, especially contacting (electroding) and interconnecting. This thesis explores electrically conductive textile surfaces made by combining conventional textile coating methods with the intrinsically conductive polymer complex poly(3,4-ethylene dioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS).

PEDOT:PSS was used in textile coating formulations including polymer binder, ethylene glycol (EG) and rheology modifier. Shear viscometry was used to identify suitable viscosities of the formulations for each coating method. The coating methods were knife coating, pad coating and screen printing. The first part of the work studied the influence of composition of the coating formulation, the amount of coating and the film formation process on the surface resistivity and the surface appearance of knife-coated textiles. The electrical resistivity was largely affected by the amount of PEDOT:PSS in the coating and indicated percolation behaviour within the system. Addition of a high-boiling solvent, i.e. EG, decreased the surface resistivity with more than four orders of magnitude. Studies of tear strength and bending rigidity showed that textiles coated with formulations containing larger amounts of PEDOT:PSS and EG were softer, more ductile and stronger than those coated with formulations containing more binder. The coated textiles were found to be durable to abrasion and cyclic strain, as well as quite resilient to the harsh treatment of shear flexing. Washing increased the surface resistivity, but the samples remained conductive after five wash cycles.

The second part of the work focused on using the coatings to transfer the voltage signal from piezoelectric textile fibres; the coatings were first applied using pad coating as the outer electrode on a woven sensor and then as screen-printed interconnections in a sensing glove based on stretchy, warp-knitted fabric. Sensor data from the glove was successfully used as input to a microcontroller running a robot gripper. These applications showed the viability of the concept and that the coatings could be made very flexible and integrated into the textile garment without substantial loss of the textile characteristics. The industrial feasibility of the approach was also verified through the variations of coating methods.

Place, publisher, year, edition, pages
Borås: Högskolan i Borås, 2015. 46 p.
Series
Skrifter från Högskolan i Borås, ISSN 0280-381X ; 56
Keyword
textile coating, conductive coating, conjugated polymers, ICP, PEDOT:PSS, textile properties, textile sensor, printed electronics, Smart textiles, poly(3, 4-ethylene dioxythiophene)-poly(styrene sulfonate)
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-19 (URN)9789187525391 (ISBN)9789187525407 (ISBN)
Public defence
2015-03-23, T154, The Swedish School of Textiles, Skaraborgsvägen 3A, Borås, 13:00 (English)
Opponent
Available from: 2015-05-19 Created: 2015-02-16 Last updated: 2015-12-18Bibliographically approved

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