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Dynamic measurement method for interfacial tension between two liquids

A liquid surface tension and dynamic measurement technology, applied in surface tension analysis and other directions, can solve the problems of instrument design structure and experimental method limitations, manual measurement errors and systematic errors, so as to achieve a simple and easy measurement method, avoid measurement errors, and measure Accurate results

Active Publication Date: 2018-06-15
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

[0003] At present, in the physics teaching and experimental teaching of major universities in China, the surface tension coefficient of the liquid between the gas and the liquid is measured. Limited by instrument design structure and experimental method

Method used

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  • Dynamic measurement method for interfacial tension between two liquids
  • Dynamic measurement method for interfacial tension between two liquids
  • Dynamic measurement method for interfacial tension between two liquids

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Embodiment Construction

[0045] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0046] The dynamic measuring method of interfacial tension between two kinds of liquids of the present invention, comprises the steps:

[0047] 1) Use a dynamic measuring device for liquid surface tension (such as figure 1 shown) to measure; before the measurement starts, turn on the power and preheat the signal conversion device 2 for 15 minutes; hang a weight plate on the hook at the end of the beam 33 of the force-sensitive sensor 4 for calibration, and then place the metal The suspension ring 7 is cleaned and hung on the hook after being leveled;

[0048] 2) When measuring, first inject liquid I with a relatively large specific gravity into the thermostatic cup 6, lower the metal suspension ring 7 and place it in liquid I, and then inject liquid II II with a relatively small specific gravity; adjust the flow rate regulator 10. Discharge liqu...

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Abstract

The invention relates to a dynamic measurement method for interfacial tension between two liquids. A liquid surface tension dynamic measurement device is used for measurement; a change curve of voltage U with time T during the process of a metal ring entering from a liquid I to a liquid II is measured; during the process of the metal ring completely entering from the liquid I to the liquid II, themaximum value U1 of the voltage before a liquid film of the liquid I is broken by pulling in the liquid II is recorded, the corresponding tensile force is f1, the value U2 of the voltage after the liquid film of the liquid I is broken by pulling and tends to be stable, the corresponding tensile force is f2, the interfacial tension between the two liquids is the force (f1-f2) / l for breaking the liquid film by pulling during the process of the metal ring completely entering from the liquid I to the liquid II per unit length, and the interfacial tension between the two liquids is as shown in thespecification. The liquid surface tension dynamic measurement device is used for experiments, experimental results are analyzed and calculated, a way to measure the interfacial tension between the two liquids is developed, the measurement method is simple and easy, and the measurement results accurate.

Description

technical field [0001] The invention relates to the technical field of liquid tension measurement, in particular to a dynamic measurement method for the interfacial tension between two liquids. Background technique [0002] Under certain conditions such as temperature and pressure, matter exists in three states: solid, liquid and gas. The contact surfaces between the various phases are collectively referred to as interfaces (about several molecular layers thick), but usually the gas-liquid or gas-solid interface is called the surface. Because the molecules on the interface and the molecules inside the bulk phase have different environments and properties, the interface layer has some special physical and chemical properties. The liquid-liquid interface refers to the physical interface formed by two immiscible or mutually saturated liquids, and the interfacial tension is the main physical quantity describing the liquid-liquid interface. It is used in surface chemistry, chemi...

Claims

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Application Information

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IPC IPC(8): G01N13/02
CPCG01N13/02
Inventor 冷雪松杨知衡王开明朱珮珣全艳玲
Owner UNIV OF SCI & TECH LIAONING
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