Method and system for measuring contact angle of superhydrophobic solid surface based on local circle fitting
A super-hydrophobic surface and solid surface technology, applied in the direction of measuring devices, surface/boundary effects, instruments, etc., can solve the problems of fitting underfitting, overfitting, etc., and achieve the effect of improving accuracy
Active Publication Date: 2020-12-04
TSINGHUA UNIV +1
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Problems solved by technology
However, in the process of measuring the static contact angle of superhydrophobic surface, these methods have the problem of underfitting or overfitting.
Method used
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[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0032] The method and system for measuring the contact angle of a superhydrophobic solid surface based on local circle fitting according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
[0033] figure 1 It is a flowchart of a method for measuring the contact angle of a superhydrophobic solid surface based on local circle fitting according to an embodiment of the present invention.
[0034] Such as figure 1 Shown, according to the superhydrophobic solid surface contact angle...
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The invention discloses a super-hydrophobic solid surface contact angle measurement method based on partial circle fitting and a system. The method comprises the following steps: acquiring an image ofa liquid droplet which is statically placed on a super-hydrophobic solid surface to be tested; according to the image of the liquid droplet which is statically placed on the super-hydrophobic solid surface to be tested, confirming an outline of the liquid droplet and a base line of the super-hydrophobic solid surface to be tested; according to the base line and the outline, confirming positions of three-phase contact points; recognizing a plurality of key points on the outline; fitting the plurality of key points to form a partial fitting circle; and according to the positions of the partialfitting circle, the base line and the three-phase contact points, acquiring a static contact angle of the super-hydrophobic solid surface to be tested. By adopting the method, on the basis of basic principles of contact angle measurement, the accuracy of static measurement angles of super-hydrophobic solid surfaces is effectively improved.
Description
technical field [0001] The invention relates to the technical field of surface and interface measurement methods, in particular to a method and system for measuring contact angles of superhydrophobic solid surfaces based on local circle fitting. Background technique [0002] The wetting process of surfaces and interfaces has very important application value. In 1997, Neihuis and Barthlott gave the principle of self-cleaning of lotus leaf surface for the first time. Since then, great attention has been paid to the self-cleaning properties of plant surfaces represented by lotus leaves, which are superhydrophobic, with a contact angle with water greater than 150° and a droplet rolling angle on the surface less than 10° . This type of surface has very special "lotus leaf characteristics", and its surface has a very rich micro-nano structure, and the contact area between the droplet and the surface is very small. With the slightest disturbance from the outside, the liquid can ...
Claims
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IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 阎志鹏梁曦东仵超罗兵何子兰张福增
Owner TSINGHUA UNIV