| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 608071 | Journal of Colloid and Interface Science | 2013 | 7 Pages |
In this paper, a micropipette-in-microcapillary method and its experimental setup are described for the study of temperature effects on surface tension. Temperature control within the confined space of a capillary was achieved by coating the outer surface of the housing microcapillary with an electrically conductive, transparent, tin-doped indium oxide (ITO) thin film as a heating jacket. The precision of this technique was discussed according to the comparisons of our results with published reference data for water, n-hexadecane, and n-decane at room temperature. The technique was further used to measure the temperature-dependent surface tension of n-decane between 25 °C and 110 °C and n-hexadecane from 25 °C to 200 °C. The results were in excellent agreement with available published values, and also indicated linear decrease rates of surface tension with decreasing temperatures.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (184 K)Download as PowerPoint slideHighlights► A micropipette-in-microcapillary setup was used for surface-tension measurements. ► Electric current passing through a coated ITO film produced high temperatures. ► γ of n-decane was measured up to 110 °C, and of n-hexadecane up to 200 °C. ► The measured surface tensions show excellent agreement with reported values.
