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相关概念视频

Contact Angle01:13

Contact Angle

11.6K
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...
11.6K

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Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces
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模拟接触角度与化学特定的散射粒子动力学.

Guadalupe Jiménez-Serratos1, Patrick B Warren1, Scott Singleton2

  • 1The Hartree Centre, STFC Daresbury Laboratory, Warrington WA4 4AD, U.K.

Langmuir : the ACS journal of surfaces and colloids
|February 5, 2025
PubMed
概括

我们开发了一种方法,将墙壁引入散射粒子动力学模拟中,从而能够精确控制表面能量和油/水等接口的接触角度. 这种方法确保了Young方程得到满足,并通过模拟和实验验证.

科学领域:

  • 计算化学和材料科学计算化学和材料科学
  • 软物质物理和界面现象.

背景情况:

  • 准确地建模接口行为,如接触角度,在各种领域至关重要.
  • 现有的模拟方法往往难以精确控制表面特性及其对湿现象的影响.

研究的目的:

  • 引入和验证一种将墙体纳入化学特异性散射粒子动力学 (DPD) 模型的方法.
  • 为了使表面能量能够精确调整,以达到液体接口所需的接触角度.
  • 确保开发的方法满足方程,以便准确的湿预测.

主要方法:

  • 开发了一种技术,在DPD模拟中引入特定化学壁.
  • 建立了一种方法来确定墙面表面能量 (正或负),以控制接触角度.
  • 验证了DPD方法论与石油在水中的油滴的直接数值模拟.
  • 测试了这种方法,使用一个实验模型的水滴在一个有单层的二氧化表面.

主要成果:

  • 成功实施了DPD框架,能够为引入的墙壁定义表面能量.
  • 证明所选的表面能量自动满足方程,预测准确的接触角.
  • 将模拟结果与独立的数值模拟和油/水和水/油系统的实验数据进行了验证.

结论:

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  • 拟议的DPD方法提供了一种强大而准确的方法,以模拟受控湿的界面现象.
  • 这种方法为设计和模拟材料科学和纳米技术中复杂的流体表面相互作用提供了有价值的工具.
  • 调整表面能量并满足方程的能力增强了DPD在界面工程中的预测能力.