Flexible potentiometric pH sensor based on textile electrode
발표자
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초록
내용
In this study, we present a textile-based pH sensor with high flexibility fabricated by printing a polymer composite as working electrode and Ag/AgCl/solid electrolyte as reference electrode on a textile substrate. The textile working electrode is composed of PANI, CNT, and agarose composite film. A thermoplastic polyurethane overlayer hot-pressed on the textile substrates provides a smooth hydrophobic surface and enables to form a more stable composite film. The textile reference electrode is composed of Ag/AgCl paste and solid electrolyte. The textile pH sensor, by integrating the textile working and reference electrodes, exhibits a good sensitivity of 45.9 mV/pH with high linearity. This pH sensor shows the excellent mechanical stability, maintaining the sensitivity and repeatability with 93% retention even in a bent state and after 1000 bending cycles. Finally, it is demonstrated that the textile pH sensor can detect the pH change on a piece of porcine skin.