Optical adhesion force measuring instrument

The interaction force between droplets and solid material surfaces is related to the direction of the force and can be divided into horizontal retention force and vertical adhesion force. The horizontal retention force and vertical adhesion force are both related to the interaction force between the droplet and the surface. Specifically, they are related to parameters such as the dynamic contact angle and interfacial tension of the droplet on the surface, and are important parameters for measuring the affinity or distance between the droplet and the surface. If the droplet phase is water, it can be used to measure the (super) hydrophobicity of solid surfaces.

The traditional methods for measuring vertical adhesion force include atomic force microscopy (AFM) and other force sensor based measurement methods (such as weighing balance sensors), as well as direct calculation methods based on interface contour analysis. LAUDA ScientificOptical adhesion force measuring instrumentIt belongs to the direct calculation method.

Optical adhesion force measuring instrumentLSA100 is developed and produced by LAUDA Scientific. It not only has the measurement function of an optical contact angle measuring instrument, but also can directly measure the vertical interaction force - adhesion force - between liquid and solid materials at the interface. It is a pioneering innovation in the field of surface analysis instruments!

The vertical adhesion force generated during the stretching process of droplets on the surface of superhydrophobic materials is an important indicator for evaluating the wetting properties of material surfaces.Under the control of a high-precision automatic lifting platform, the material surface and liquid droplets are first squeezed together to ensure full contact between the liquid-solid phases, and then slowly stretched until the liquid droplets separate from the material surface. The software can accurately calculate the vertical adhesion force of the material surface acting on the droplet through the deformation of the droplet.

Liquid surface tension: 72.8 mN/m droplet volume v: 5 μ l maximum adhesion force: 45.9 μ N

Technical Specifications:

||Software calculation method: Laplace Young

||Vertical adhesion force measurement

Sample table lifting method: automatic programmable

Sample stage movement speed: 0.04~500 mm/min

Position accuracy: 0.05 μ m

Measurement resolution: 0.01 μ N

||Contact angle measurement range: 0-180 °, measurement accuracy ± 0.1 °

||Surface tension measurement range: 0.01-2000mN/m, resolution 0.01mN/m