Surface tension constant determining model and method, and surface tension measurement method

Abstract

The invention belongs to the related technical field of surface tension measurement, and discloses a surface tension constant determining model and method, and a surface tension measurement method. The surface tension constant determining method comprises following steps of (a) measuring and obtaining molar volume of liquid molecules of to-be-tested liquid and number of molecules in liquid micelle; and (b) providing the mentioned surface tension constant determining model, and substituting the obtained molar volume of the liquid molecules and the number of molecules in liquid micelle into a mathematical expression of the built surface tension constant determining model so as to calculate and obtain a liquid surface tension constant of the to-be-tested liquid. According to the method, the surface tension constant determining model is built based on a molecular motion theory and statistical mechanics analysis, then the surface tension constant is determined and the surface tension is measured by using the surface tension constant determining model, so that the method is easy to conduct, has high accuracy, and has a wide application range.

Description

technical field [0001] The invention belongs to the related technical field of surface tension measurement, and more specifically relates to a surface tension constant determination model and method, and a surface tension measurement method. Background technique [0002] When liquid and gas come into contact, a surface layer is formed, and the mutual attraction in this surface layer is surface tension. Surface tension is one of the important properties of a liquid, which represents the pulling force that interacts between any two adjacent parts of the liquid surface perpendicular to their unit length dividing line. The formation of surface tension is closely related to the special stress state of molecules in the liquid surface thin layer. Among them, surface tension is often observed in daily life, such as capillary phenomenon, soap bubble phenomenon, infiltration and non-infiltration phenomenon, etc., and sometimes plays an important role in liquid movement. It can be see...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a surface tension constant determination model and method, and a surface tension measurement method, which is triggered from the binary complete inelastic collision theory and the principle of entropy maximization, based on molecular motion Theoretical and statistical mechanics analysis is used to construct the surface tension constant determination model, and then the surface tension constant determination model is used to determine the surface tension constant and measure the surface tension. , the cost is low, and to a certain extent, it solves the problems of poor accuracy and high requirements for instruments

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