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Updated: Jun 7, 2025

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces
08:05

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Published on: September 9, 2022

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环极-表面活性剂水溶液振荡滴的界面粘弹性:实验和理论

J Roberto Romero-Arias1, Alberto S Luviano2,3, Miguel Costas2

  • 1Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico. romero@mym.iimas.unam.mx.

Soft matter
|November 14, 2024
PubMed
概括

循环德克斯-表面活性剂溶液中的振荡滴显示出显著的粘性弹性. 阿尔法-环极和表面活性剂复合体之间的双极-双极相互作用控制这些界面特性.

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Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
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The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
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Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
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