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Mi-S3.4-SE:Bmat: Sesión Especial: Biomateriales y terapias avanzadas Lugar: Aula 1.05 Presidente de la sesión: Ángel Raya | |
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16:45 - 17:00
Manufacture and characterization of sustainable ECG electrodes 1: IMB-CNM, CSIC, España; 2: Advanced Biomaterials and Nanotechnology, University of Girona, Maria Aurèlia Capmany 61, 17003 Girona, Spain; 3: Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Bellaterra, Spain Cardiovascular diseases account for a major proportion of global mortality, with ECG recordings being an essential diagnostic tool. However, conventional Ag/AgCl electrodes contribute significantly to medical waste. This work proposes a biodegradable alternative based on a conductive vegetal cellulose (cVC) substrate. The material was produced from TEMPO-oxidized sulphite pulp, mechanically homogenized into a nanocellulose gel, and doped with PEDOT:PSS to obtain conductive films. These films were characterized in terms of thickness, electrical conductivity using the Van der Pauw method, and wettability via contact angle measurements. A three-layer electrode was then designed, comprising the conductive cellulose core, a commercial adhesive layer, and a hydrogel electrolyte. The electrochemical performance of the device was evaluated through electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) stability tests, and cyclic voltammetry (CV), and compared to commercial Ag/AgCl electrodes. Results showed comparable impedance in the ECG-relevant frequency range, minimal potential drift well below ANSI/AAMI EC12:2000 limits, and resistance to hydrogel wetting. Finally, electrocardiographic recordings confirmed signal quality equivalent to that of commercial electrodes, validating the proposed design as a sustainable and effective alternative for biomedical applications.
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