On the Use of Probe Liquids for Surface Energy Measurements

Bernette M. Oosterlaken, Adriaan van den Bruinhorst, Gijsbertus de With (Corresponding author)

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Samenvatting

To assess the surface energy of solids, normally a set of probe liquids comprising polar and apolar compounds is used. Here we survey the surface tension of some frequently used probe liquids as given in the literature, for which a significant scatter appears to be present, and compare them with experimentally determined values. We discuss the influence of the liquid purity as well as the contact angle between the liquid and the Wilhelmy plate, which is commonly used for surface tension measurements. For hygroscopic polar probe liquids such as dimethyl sulfoxide, ethylene glycol, and formamide, water impurities appear to be of limited importance. Similarly, the amount of halogen impurities is of minor importance for diiodomethane and 1-bromonaphthalene, which decompose under the influence of light. Conversely, the influence of the contact angle for liquids that do not fully wet the plate, such as diiodomethane, is large in many cases, rendering a rather accurate determination of the contact angle necessary. Some discrepancies in the literature are indicated, and brief recommendations for future studies using such liquids are given.

Originele taal-2Engels
Pagina's (van-tot)16701–16711
Aantal pagina's11
TijdschriftLangmuir
Volume39
Nummer van het tijdschrift47
DOI's
StatusGepubliceerd - 28 nov. 2023

Financiering

The authors thank M. Nooyens, N. van Dijk, and L. Moone for their experimental contributions as well as Dr. A. C. C. Esteves and Prof. R. Tuinier for discussions and to Dr. Mulero, Universidad de Extremadura, Badajoz, Spain, for bringing ref (23) to our attention. This work was partially funded by NWO, project Bi-HY, 718.016.003. The authors thank M. Nooyens, N. van Dijk, and L. Moone for their experimental contributions as well as Dr. A. C. C. Esteves and Prof. R. Tuinier for discussions and to Dr. Mulero, Universidad de Extremadura, Badajoz, Spain, for bringing ref to our attention. This work was partially funded by NWO, project Bi-HY, 718.016.003.

FinanciersFinanciernummer
Nederlandse Organisatie voor Wetenschappelijk Onderzoek718.016.003
University of Extremadura

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