Journal
PHYSIOLOGICAL MEASUREMENT
Volume 31, Issue 10, Pages S169-S182Publisher
IOP Publishing Ltd
DOI: 10.1088/0967-3334/31/10/S02
Keywords
hydrogel; impedance spectroscopy; dielectric properties
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Funding
- Lagrange-CRT Foundation, Torino, Italy
- Compagnia di San Paolo
- Fondazione CRT, through Laboratory for Engineering of the Neuromuscular System (LISiN) of Politecnico di Torino
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
- Associazione per lo Sviluppo Scientifico e Tecnologico del Piemonte (ASP)
- Regione Piemonte, Direzione Sanita, Settore Promozione della Salute e Interventi di Prevenzione Individuale e Collettiva
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The effect of composition on the dielectric properties of hydrogels for biomedical applications is experimentally investigated. The hydrogels, containing hydroxyethylcellulose (HEC), are characterized by means of the impedance spectroscopy technique. The real and imaginary parts of the electrical impedance of the hydrogels are determined for several concentrations of HEC, and of KCl, dissolved in it, for the frequency range of interest for biomedical applications. The results are compared with those corresponding to depurated water. The equivalent conductivity of the hydrogels is evaluated by performing measurements on samples of different thicknesses. With the limit of a small concentration of salt (<= 6%), the dependence of the electrical conductivity of the hydrogel on the salt concentration is linear.
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