Surface tension measurement measuring instrument DSA25 Series

contact anglefor controlfor liquids

In its Expert configuration, the DSA25 Drop Shape Analyzer is designed for determining the wettability of solids by means of the contact angle as well as the surface tension of liquids such as coating substances or adhesives. Thanks to the combination of speed and versatile evaluation options, the analyses give quick feedback to pretreatment steps in quality control but also allow assessing the resulting adhesion. Applications • Quality assurance of activation processes such as plasma treatment, flame treatment, or corona treatment • Checking wettability of plastics, glass, ceramics, wood, paper, or metal • Testing the effectiveness of hydrophobic coatings and other coatings • Analyzing coating liquids and adhesives and assessing their adhesion • Assessing long-term stability of coatings • Analyzing (super-) hydrophobic and self-cleaning surfaces • Wetting analysis at controlled temperature and/or humidity Measuring methods •Contact angle of a drop on a solid surface •Contact angles of two drops dosed in parallel •Contact angle using a gas bubble beneath a solid surface in a liquid •Roll-off behavior and advancing/receding contact angle of a drop on a tilted surface •Surface free energy of a solid using contact angle data •Surface or interfacial tension using the curvature of a drop or bubble at the tip of a needle •Calculating adhesion-related scientific parameters for the interfacial contact •Carrying out a measurement up to 20 consecutive times and displaying the results together •Calculating the polar and disperse part of the surface tension from contact angle and surface tension data