Characterization of the solvent specific evaporation from a carbon nanotube buckypaper doped by goethite nanowires

Tóth, Ildikó and Veress, Gábor and Szenti, Imre and Kukovecz, Ákos (2023) Characterization of the solvent specific evaporation from a carbon nanotube buckypaper doped by goethite nanowires. JOURNAL OF MOLECULAR LIQUIDS, 389. No.-122816. ISSN 0167-7322

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Abstract

Non-functionalized carbon nanotube based self-supporting buckypaper doped by goethite nanowire was prepared (characterized by TEM, XRD, FTIR, DLS, electrophoresis, SEM) and studied to determine the wetting and evaporation properties of the composite. The wetting and vaporization of water, methanol, ethanol, 2-propanol, acetone, 1,4-dioxane were monitored at 50 ◦ C parallel by weight and electrical resistance measurements and also by thermography in case of water and ethanol. Based on the weight measurements, the different stages of the evaporation (evaporation of sessile droplet, vaporization of the condensed and adsorbed solvents from the porous system) could be distinguished, which could be characterized by their evaporation rate and the amount of liquid remaining in the porous system at the end of the given stages. The evaporation profiles determined from the electrical resistance measurements are characteristic for the evaporating solvents, similar to the mass measurement results. The details of the wetting process can be analyzed by thermography based on the area and temperature of the wetted region. The relationship between the physical properties of the solvents and the parameters characteristic for the evaporation obtained from the weight and electrical resistance measurements was statistically analyzed using Pearson correlation coefficients method. There is a very high correlation for example between surface tension and t t (PCC = 0.971) or t s (PCC = 0.992), and also between the boiling point and Area (R) (PCC = 0.929). These results allow us to predict the possibility of this setup in a potential future analytical application.

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