Device and method for testing contact angle and interfacial tension at ultrahigh pressure and high temperature

Abstract

The invention discloses a device and method for testing a contact angle and interfacial tension at ultrahigh pressure and high temperature, and relates to a testing method for testing a contact angle and interfacial tension by the adoption of a vacuum liquid drop method or image fitting method for fitting a Young-Laplace equation, and a testing device for testing a contact angle and surface / interfacial tension at ultrahigh pressure and high temperature. The device is composed of two booster pumps, an ultrahigh-pressure and high-temperature cavity of a two-side observation window made of sapphire glass, a high-viscosity sample heating pool, a high-pressure connection accessory, a camera with a telecentric lens, a collimated light source and the like. After a liquid drop outline image is shot, the fitting Young-Laplace equation is used for testing the contact angle and the interfacial tension value, and the testing device and method can analyze the contact angles and interfacial tension values under different pressure conditions, have the extremely high popularization value in the fields of oil field, petrochemical engineering, new material research and the like, particularly can test the interfacial tension value and the contact angle by simulating recovery environment actual pressure and temperature conditions in tertiary oil recovery simulation experiments, and are quite effective.

Description

technical field [0001] This patent discloses a test method for testing contact angle and interfacial tension value using real droplet method or image fitting method to fit Young-Laplace equation and a method for testing contact angle and surface / interfacial tension under ultra-high pressure and high temperature conditions A testing device belongs to the field of interface chemical analysis instruments. Background technique [0002] Basic indicators such as liquid-liquid interfacial tension, liquid-gas surface tension, and solid-liquid contact angle are the basic parameters to characterize the physical and chemical properties of substances. The contact angle refers to the point where a small drop of liquid is dropped on a solid horizontal plane, and at the solid-liquid-gas three-phase junction point on the solid surface, the two tangent lines of the gas-liquid interface and the solid-liquid interface sandwich the liquid phase The angle formed when the figure 1 . Contact an...

AI Technical Summary

Problems solved by technology

[0007] 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 Conditions of Temperature Control, Humidity Control, and Pressure Control" 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

Therefore, the content proposed in the patent is relatively backward, the implementability is average, and it cannot solve the aforementioned needs of ultra-high pressure, humidity control, high-precision interfacial tension and contact angle measurement.

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