在疏水表面上移动的液体空气接触线的电荷转移火和最大值
1Department of Physics and Technology, University of Bergen, Allegaten 55, Bergen 5020, Norway.
Langmuir : the ACS journal of surfaces and colloids
|February 14, 2024
概括
疏水性聚合物表面的电荷转移受到糖醇和甲醇混合物的影响. 糖醇将最大电荷转移转移到更高的盐度,与甲醇不同,由于电气双层中的离子相互作用.
科学领域:
- 表面科学是一门科学.
- 物理化学 物理化学
- 电化学 电化学 电化学
背景情况:
- 疏水表面与电解质溶液相互作用,影响表面电荷.
- 了解电荷转移对于传感器和涂层的应用至关重要.
研究的目的:
- 为了研究疏水性聚合物表面和含有甘油和甲醇的盐溶液之间的电荷转移.
- 阐明溶剂成分和盐度对表面电荷动态的作用.
主要方法:
- 测量接触角,以评估表面的疏水性.
- 电化学技术用于量化电荷转移.
- 分析电气双层内的离子行为.
主要成果:
- 与甲醇相比,随着糖分数的增加,电荷转移的下降速度更快.
- 电荷转移最初随着盐度的增加而增加,然后减少,呈现最大值.
- 添加糖将最大电荷转移转移到更高的盐度,而甲醇则没有.
结论:
- 观察到的现象是由一个模型解释的,该模型考虑了从电气双层中去除离子的剪切距离的减少.
- 作用于离子的力量的相互作用显著影响了疏水表面电解质相互作用中的电荷转移动态.
- 溶剂特性,特别是甘油,在调节离子分布和表面电荷方面发挥着关键作用.
相关概念视频
Surface Tension of Fluid
283
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...
Surface tension varies...
283
Contact Angle
12.4K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
12.4K
Capillarity in Fluid
211
Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
211
Surface Tension, Capillary Action, and Viscosity
27.8K
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...
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...
27.8K


