Carbon nanotube-cellulose ink for rapid solvent identification.
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Date
2023
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Abstract
In this work, a conductive ink based on microfibrillated cellulose (MFC) and multiwalled carbon nanotubes (MWCNTs) was used
to produce transducers for rapid liquid identification. The transducers are simple resistive devices that can be easily fabricated by
scalable printing techniques. We monitored the electrical response due to the interaction between a given liquid with the carbon
nanotube–cellulose film over time. Using principal component analysis of the electrical response, we were able to extract robust
data to differentiate between the liquids. We show that the proposed liquid sensor can classify different liquids, including organic
solvents (acetone, chloroform, and different alcohols) and is also able to differentiate low concentrations of glycerin in water
(10–100 ppm). We have also investigated the influence of two important properties of the liquids, namely dielectric constant and
vapor pressure, on the transduction of the MFC-MWCNT sensors. These results were corroborated by independent heat flow mea-
surements (thermogravimetric analysis). The proposed MFC-MWCNT sensor platform may help paving the way to rapid, inexpensive, and robust liquid analysis and identification.
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Keywords
Electronic tongue, Fibrillated cellulose, Liquid sensor
Citation
CARDOSO, T. A. de B. et al. Carbon nanotube-cellulose ink for rapid solvent identification. Beilstein Journal of Nanotechnology, v. 14, p. 535–543, 2023. Disponível em: <https://www.beilstein-journals.org/bjnano/articles/14/44>. Acesso em: 06 jul. 2023.