Critical surface tension (γc) is estimated by extrapolating a Zisman plot, obtained by plotting the cosine of the contact angle of pure liquids on a solid surface to be studied, against the surface tension of the same series of liquids. … Continued
Sedimentation measurements are used to observe precipitation measurements for various batches of finely dispersed powders. This measurement method can be used to evaluate the sedimentation, wetting, and dispersibility of powders. Wetting property using initial dispersibility of powder: Use the sedimentation … Continued
Penetration measurements are used to analyse the penetration resistance of sediment or soft solids such as gels and pastes. The purpose of the test is to measure the upward force exerted by a soft solid on a penetrating object, and … Continued
When the dynamic contact angle values or parameters of a Washburn test need to be determined, it is necessary to know the density of the test liquids. If that is unknown, then by using the density Kit, which consists of … Continued
Wicking experiments are used to obtain weight pick-up information for porous solid samples. These experiments can also be used to identify unknown samples. If the sample under investigation is porous, it can be attached to the fixing device either with … Continued
Interfacial tension measurements can be done using both the Ring and Plate Methods. The interfacial tension (𝛾) is calculated using the same equation as surface tension calculations: Usually, the tension is measured between an aqueous liquid such as water, and … Continued
The two most common types of surface tension measurements are Ring (Du Noüy) and Plate (Wilhelmy) methods. Du Noüy Ring method During measurement, a Platinum-Iridium ring is first dipped below the surface. The stage containing the beaker is slowly lowered … Continued
The DST series of analysers perform surface and interfacial tension measurements using the Wilhelmy Plate and Du Nuoy Ring methods. The DCA series of dynamic contact angle analysers are extremely sensitive instruments offering a wide range of measurements for surface … Continued