Drop contour analysis

(Kopie 2)

Drop contour analysis enables contact angle measurement in case of configurable pressures and temperatures. The contact angle θ is the most important value in order to characterise the wetting of surfaces with a liquid. In accordance with the Young equation (γFT = γFA - γTAcos(θ)) it is directly dependent on the involved surface tensions between the solid and the drop, the solid and the atmosphere and the drop and the atmosphere. The greater the surface tension between the solid and the atmosphere, the greater the solid's surface energy. The drop will attempt to spread out, which results in a small contact angle.
In drop contour analysis, a sample system consisting of a substrate and the material to be wetted are recorded against a backlight. The angle can then be determined by the software.

Link to the device

 

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