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A device and method for rapidly measuring the dynamic contact angle of liquid droplets

A technology of dynamic contact angle and measurement method, applied in the direction of measurement device, instrument, surface/boundary effect, etc., can solve the problem of inability to measure the dynamic process of contact angle

Inactive Publication Date: 2021-05-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the measurement of the dynamic contact angle, the existing products on the market cannot measure the dynamic process of the change of the contact angle with the flow rate.

Method used

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  • A device and method for rapidly measuring the dynamic contact angle of liquid droplets
  • A device and method for rapidly measuring the dynamic contact angle of liquid droplets
  • A device and method for rapidly measuring the dynamic contact angle of liquid droplets

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments of the specification.

[0039] The technical problem to be solved by the present invention is to provide a contact angle measuring device with simple structure, low cost, strong practicability and expandability, which can quickly measure the dynamic contact angle of the droplet 16 .

[0040] The present invention provides a device for rapidly measuring the dynamic contact angle of liquid droplets, which includes a control host 1 , a camera 2 , a sample stage 3 , a light source 4 , an optical plate 5 and a syringe pump 6 . The bottom of the sample stage 3 is fixed on the optical plate 5 through the connecting rod 8, and the top is connected with the syringe pump 6 through the liquid injection tube; the camera 2 is placed in front of the sample stage 3, and the bottom of the camera 2 is fixed on the optical plate 5 through the connecting rod 8, The camera 2 ...

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Abstract

The invention discloses a device and method for quickly measuring the dynamic contact angle of liquid droplets. The device includes a camera, a liquid injection device and a sample stage. The sample stage includes an outer frame and a circular flat plate installed in the outer frame and capable of rotating freely. The plate is provided with spring clips for clamping two solid sample slices to be tested, and a channel for liquid to flow is formed between the two solid sample slices to be tested. First rotate the channel to a horizontal state, then inject liquid into the channel through the liquid injection device, rotate the channel, take pictures of the shape of the interface between the droplet and the solid sample sheet when the droplet just slides, and measure the key contact angle of the droplet using drawing software, then Rotate the channel to a vertical state, measure the dynamic contact angle and sliding velocity of the droplet, and then calculate the two parameters of the hydrodynamic model of the contact angle, and use the parameters to quickly calculate the dynamic contact angle at any speed. The invention has the advantages of simple structure, fast and quick measurement, and can quickly establish a dynamic contact angle calculation model.

Description

technical field [0001] The invention belongs to the field of fluid interface, and relates to a method for measuring liquid contact angle, in particular to a device and method for quickly measuring the dynamic contact angle of liquid droplets. Background technique [0002] Surface wettability is one of the characteristic properties of solid materials, which is usually measured by the angle (contact angle) between the liquid droplet and the contact line of the solid surface. The size of the contact angle has an important influence on the adsorption, detachment, expansion and other behaviors of liquid on the solid surface, and is an important indicator in industrial production. In addition, in engineering activities, especially in underground geotechnical engineering, the size of the contact angle determines the size of the capillary driving force in seepage in underground pores and fissures, and has an important impact on the law of underground seepage. Underground seepage is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/02
CPCG01N13/02G01N2013/0208
Inventor 杨志兵薛松李东奇陈益峰
Owner WUHAN UNIV
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