Testing method for intrinsic contact angle measurement based on three-dimensional space inclination angle correction

Abstract

The invention belongs to the technical field of interface chemistry analysis and testing, and discloses a testing method for intrinsic contact angle measurement based on three-dimensional space inclination angle correction. The method comprises the following steps: establishment of a simultaneous contact angle calculation equation set, acquisition of an inclination angle, correction of the inclination angle, and calculation of an intrinsic contact angle, wherein during the calculation of the contact angle, the inclination angle of the surface of a sample is corrected, and an intrinsic contactangle value of a drop is obtained after a correction gravity coefficient is adopted. The method disclosed by the invention has the advantages that the problem of the conventional apparent contact angle measurement that a real contact angle of a solid material cannot be accurately evaluated is solved, the precision of the measured contact angle value is improved, and the phenomenon of contact anglehysteresis of the solid material caused by surface roughness, chemical diversity and heterogeneity can be evaluated.

Description

technical field [0001] The invention relates to a test method for measuring intrinsic contact angle based on three-dimensional space inclination angle correction, which belongs to the technical field of interface chemical analysis and test. Background technique [0002] Contact angle and surface tension are one of the important indicators to characterize the physical and chemical properties of materials. Among them, the contact angle value is an important index to characterize the physical and chemical properties of solid materials. Such as figure 1 As shown, the relationship between contact angle, surface tension and interfacial tension is usually Young's equation, where θ is the contact angle, γS is the surface tension value (surface energy) of the solid, and γL is the surface tension value of the solid, γSL is the interfacial tension value between solid and liquid, and γS is γL·cosθ+γSL. The current contact angle measurement methods are usually video method (the method...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a test method for measuring the intrinsic contact angle based on the correction of the inclination angle in three-dimensional space, so as to solve the problem that the current apparent contact angle measurement cannot be used to accurately evaluate the real contact angle of solid materials, Improve the measurement accuracy of contact angle values ​​and evaluate the contact angle hysteresis of solid materials due to surface roughness, chemical diversity and heterogeneity

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