Abstract
In this paper, we demonstrate a highly conductive, stretchable, and wash-durable fabric for a variety of electronic textile applications such as electromagnetic interference (EMI) shielding, Joule heating, and strain sensing by utilizing a chemical etchant pretreatment that promotes covalent bonding, a reactive silver ink with conformal in situ silver reduction, and the use of a polymer coating for a protective barrier. Reactive ink coated on polyethylene terephthalate (PET) knitted textiles exhibit an average EMI shielding efficiency of 74.8 dB in the X band (frequency range of 8–12 GHz) and 76.6 dB in the Ku band (12–18 GHz). The conductive textiles show high Joule heating performance, where a temperature of 152 °C can be achieved at only 1.3 V DC applied voltage. This Joule heating performance is maintained after stretching and washing. Furthermore, the textile may be used for strain sensing and monitoring human movement. As prepared silver films do not degrade after 1000 stretching cycles at 50 % strain and maintain EMI SE higher than 70 dB after 300 min washing. The demonstrated textiles may be used for wearable electronics, personal medical devices, and next generation communications.
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