Interfacial Tension Measurements

Liquid surface/interfacial tension measurements are done through the so-called Pendent Drop method with a contact angle meter. The shape of the hanging drop is measured using the established Young-Laplace theory. Both static and dynamic interfacial tension measurements are possible with the same set of hardware. Interfacial tension measurements through the Pendent Drop method require less sample liquid than other measurement techniques, making it ideal for analysis of small volumes of liquids such as inks, alcohol mixtures and creams.

Typical Experimental Results:

Figure 1. Image capture of a water droplet suspended in toluene used for interfacial tension analysis.

Figure 2. Image capture of a water droplet suspended in hexane used for interfacial tension analysis.

Figure 3. Captured image of an oil droplet for interfacial tension analysis in distilled water; the Young-Laplace method analysis routine selected; the blue line is the curve fitted line for analysis.

Droplet used for interfacial tension analysis in air

Applications:

Instruments: The DM-701 Fully Automatic Contact Angle Meter

Key Specifications:

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