The production of electrical and electronic equipment is increasing worldwide with a dramatic increase of electronic waste. Sustainable materials to produce sensors may thus positively impact on the environment. Casein is a milk protein that was used to fabricate a non-cytotoxic and biodegradable capacitive sensor by a green chemical process adding glycerol and trehalose. The casein-based film was characterized by means of thermal (TGA and EGA-MS) and spectroscopic (FTIR-ATR and Dielectric Spectroscopy) techniques. Contact angle, water vapour transmission rate, cytotoxicity and biodegradability were also assessed. A PEDOT:PSS/reduced graphene oxide ink was produced and screen-printed onto the film surface to obtain electrically conductive electrodes. The dielectric properties of the casein-based film allowed for the fabrication of a capacitive sensor that proved sensitive to pH changes.
A casein-based biodegradable and sustainable capacitive sensor / De Gregorio E.; Miliani F.M.; Vivaldi F.M.; Calisi N.; Poma N.; Tavanti A.; Duce C.; Nardella F.; Legnaioli S.; Carota A.G.; Strambini L.; Biagini D.; Lomonaco T.; Di Francesco F.; Salvo P.. - In: MATERIALS CHEMISTRY AND PHYSICS. - ISSN 0254-0584. - ELETTRONICO. - 314:(2024), pp. 128888.0-128888.0. [10.1016/j.matchemphys.2024.128888]
A casein-based biodegradable and sustainable capacitive sensor
Calisi N.;
2024
Abstract
The production of electrical and electronic equipment is increasing worldwide with a dramatic increase of electronic waste. Sustainable materials to produce sensors may thus positively impact on the environment. Casein is a milk protein that was used to fabricate a non-cytotoxic and biodegradable capacitive sensor by a green chemical process adding glycerol and trehalose. The casein-based film was characterized by means of thermal (TGA and EGA-MS) and spectroscopic (FTIR-ATR and Dielectric Spectroscopy) techniques. Contact angle, water vapour transmission rate, cytotoxicity and biodegradability were also assessed. A PEDOT:PSS/reduced graphene oxide ink was produced and screen-printed onto the film surface to obtain electrically conductive electrodes. The dielectric properties of the casein-based film allowed for the fabrication of a capacitive sensor that proved sensitive to pH changes.File | Dimensione | Formato | |
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