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Deterioration and recovery of electrical conductivity during fatigue testing of stretchable wires printed onto fabrics using Ag-loaded electrically conductive pastes

Published online by Cambridge University Press:  04 February 2014

Masahiro Inoue ,
Yasunori Tada ,
Yosuke Itabashi  and
Tomohiro Tokumaru
Masahiro Inoue
Affiliation:
ASRLD Unit, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
Yasunori Tada
Affiliation:
ASRLD Unit, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
Yosuke Itabashi
Affiliation:
Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
Tomohiro Tokumaru
Affiliation:
Biosignal Co., Ltd., 2-1-37 304 Honjyo-nishi, Kita-ku, Osaka 531-0073, Japan
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Abstract

Stretchable wires were printed on fabrics using an acrylic-based paste loaded with Ag flakes, and their fatigue properties examined. The electrical conductivity of the wires significantly decreased during a cyclic tensile test, because of a decrease in their elastic moduli (Mullins softening) as well as fatigue cracking. Because the electrical resistance and elastic moduli of the damaged samples were partially recovered by annealing at 100 °C, fatigue damage introduced to the wires was divided into reversible and irreversible components, where cracking is the irreversible damage. Although crack bridging by fibrils could occur during the fatigue test, no crack healing was observed during annealing. In contrast, fatigue damage from Mullins softening of the wires could be recovered during annealing. The recovery of electrical conductivity occurs mostly in the initial stage of rearrangement of polymer structure during annealing.

Keywords

fatigueelectrical propertiesscreen printing
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1628: Symposium M – Large-Area Processing and Patterning for Active Optical and Electronic Devices , 2014 , mrsf13-1628-m05-02
Copyright
Copyright © Materials Research Society 2014 

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References

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