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A method for testing the surface energy of a liquid and its components

A liquid surface and component technology, used in surface tension analysis, measuring devices, surface/boundary effects, etc., can solve problems such as large deviation of results, lack of experimental error liquid surface, unknown surface energy components, etc., to achieve small experimental errors and operation. Short answer, less computational effort

Active Publication Date: 2021-10-08
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the liquid, because the surface energy component of the surface of the solid that acts as a probe is unknown, if the surface energy components of the three solid surfaces are directly measured, and then the surface energy components of the liquid are calculated according to the contact angles between the three solids and the liquid to be measured, Due to the accumulation of experimental errors, the results are quite biased
Therefore, there is still a lack of testing methods for the liquid surface energy and its components with small experimental errors.

Method used

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  • A method for testing the surface energy of a liquid and its components
  • A method for testing the surface energy of a liquid and its components
  • A method for testing the surface energy of a liquid and its components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] Test the surface energy and its components of diiodomethane

[0097] 1) Utilize ring method to measure diiodomethane surface tension and bring in formula (6):

[0098]

[0099] In the formula: γ 待测液 is the surface energy of diiodomethane, mJ / m 2 ;

[0100] is the non-polar component of the surface energy of diiodomethane, mJ / m 2 ;

[0101] is the acid component of the surface energy of diiodomethane, mJ / m 2 ;

[0102] is the alkali component of the surface energy of diiodomethane, mJ / m 2 ;

[0103] 2) Test the contact angle between diiodomethane and probe solid A (see figure 2 ), the contact angle and the nonpolar component of the surface energy of the probe solid A measured above are brought into formula (7):

[0104]

[0105] In the formula: is the non-polar component of the surface energy of diiodomethane, mJ / m 2 ;

[0106] is the acid component of the surface energy of diiodomethane, mJ / m 2 ;

[0107] is the alkali component of the su...

Embodiment 2

[0124] Test the surface energy and its components of ethylene glycol

[0125] 1) Use the ring method to measure the surface tension of ethylene glycol into the formula (6):

[0126]

[0127] In the formula: γ 待测液 is the surface energy of ethylene glycol, mJ / m 2 ;

[0128] is the non-polar component of the surface energy of ethylene glycol, mJ / m 2 ;

[0129] is the acid content of the surface energy of ethylene glycol, mJ / m 2 ;

[0130] is the alkali component of the surface energy of ethylene glycol, mJ / m 2 ;

[0131] 2) Test the contact angle between ethylene glycol and probe solid A (see Figure 4 ), the contact angle and the nonpolar component of the surface energy of the probe solid A measured above are brought into formula (7):

[0132]

[0133] In the formula: is the non-polar component of the surface energy of ethylene glycol, mJ / m 2 ;

[0134] is the acid content of the surface energy of ethylene glycol, mJ / m 2 ;

[0135] is the alkali comp...

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Abstract

The invention relates to a method for testing liquid surface energy and its components, belonging to the technical field of surface physics and chemistry. Based on Young's equation, the method calculates the surface energy of the liquid and its components by testing the contact angle between the liquid and the probe solid. By selecting a suitable probe solid and optimizing its calculation formula, the method is simple to operate, with a small amount of calculation, and the experiment The error is small, and it can be widely used in the test of various liquid surface energies and their components.

Description

technical field [0001] The invention belongs to the technical field of surface physics and chemistry, and in particular relates to a method for testing liquid surface energy and its components. Background technique [0002] Matter has a certain surface in nature, and its surface energy includes non-polar components and polar components, and the polar components can be further divided into acid components and alkali components. The surface energy components satisfy the following relationship: [0003] [0004] [0005] Among them, γ is the surface energy, the subscript s represents the solid, the subscript l represents the liquid, and γ d is the nonpolar component, γ ab is the polar component, γ + and gamma - are the acid and base components, respectively. [0006] When solid and liquid are in contact with each other, T.Young believes that under non-vacuum conditions, the entire interface system will be simultaneously affected by the solid surface energy γ s , liq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/02
CPCG01N13/02G01N2013/0208G01N2013/0241G01N2013/0283
Inventor 杨长辉田义袁世军余林文张明涛袁红晓
Owner CHONGQING UNIV
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