Intrinsic contact angle test and test method thereof

Abstract

The invention discloses an intrinsic contact angle test apparatus and a test method thereof. A true drop technology or an image fitting technology is adopted to fit the test dynamic contact angle of a Young-Laplace equation, and Wenzel-Casie-Baster stimulation is used to derive an intrinsic contact angle calculating equation. The invention also provides the intrinsic contact angle test apparatus. The apparatus comprises a combination boy controlled by the rotating mechanism of a worm and gear structure and having a lens and a sample bench which rotate together, a XYZ and horizontally-adjustable sample bench combination body, a sample clamp, an injection pump and an XYZ control mechanism combination body thereof, a camera with a telecentric lens, and a parallel light source. The contact angle is obtained by shooting the profile image of a liquid drop and adopting the Young-Laplace equation fitting test. The apparatus and the test method can be used to analyze the chemical anisotropy of a material and the intrinsic contact angle under contact angle hysteresis condition due to surface roughness, and has extremely broad popularization values in fields of new materials and bionic materials.

Description

technical field [0001] This patent discloses a method of fitting the Young-Laplace equation to test the dynamic contact angle by using the real droplet method or the image fitting method, and provides an intrinsic contact angle calculation formula deduced by Wenzel-Cassie-Baster simulation to test the solid-liquid The invention discloses a method for testing an intrinsic contact angle and a device suitable for testing the intrinsic contact angle, belonging to the technical field of interface chemical analysis. Background technique [0002] Basic indicators such as liquid-liquid interfacial tension, liquid-gas surface tension, and solid-liquid contact angle are basic parameters that characterize the physical and chemical properties of a substance. At the solid-liquid-gas three-phase junction point above, the angle formed when the two tangents of the gas-liquid interface and the solid-liquid interface sandwich the liquid phase is shown in the appendix figure 1 . The contact ...

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Problems solved by technology

[0008] Chinese patent ZL200910034768.X "A Device for Simultaneously Measuring Droplet Temperature, Surface Tension, and Contact Angle under Temperature and Humidity Control" and ZL201210127093.5 "A Device for Measuring Droplet Contact Angle and Rolling Angle under Temperature Control, Humidity Control, and Pressure Control Conditions" Device" describes a device for measuring the contact angle and rolling angle of liquid droplets under the conditions of temperature control, humidity control and pressure control. It is a relatively vague theoretical description. The specific implementation details are also general descriptions. From the implementation Look, the operability is not strong

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