在具有功能化和非功能化铁粒子的疏水表面上滴滴运动的动力学
Ghassan Hassan1,2, Bekir Sami Yilbas1,3,2,4, Abba Abdulhamid Abubakar1,5
1Mechanical Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM) Dhahran 31261 Saudi Arabia bsyilbas@kfupm.edu.sa.
RSC advances
|November 30, 2023
概括
磁力使铁流体液滴在疏水表面上进行操纵. 滴滴运动从滑动过渡到推进的滚动,特别是在功能化的铁粒子上,增强了应用程序的控制.
科学领域:
- 材料科学 材料科学 材料科学
- 流体动力学 流体动力学
- 表面化学 表面化学
背景情况:
- 控制水表面上的铁流体滴滴运动对于传感和油水分离等应用至关重要.
- 目前的铁流体制备方法可能会限制可持续应用中的稳定性和功能.
- 外部磁力为动态滴滴操纵提供了一个有前途的方法.
研究的目的:
- 在功能化和非功能化铁粒子表面上研究铁流体滴滴动力学.
- 分析滴水体积,铁粒子层宽度和度对滴水运动的影响.
- 了解磁场下的滑动和滚动运动之间的过渡.
主要方法:
- 在具有不同铁粒子特性的疏水表面上利用铁流体滴.
- 应用外部磁场来诱导和控制滴滴运动.
- 使用高速摄像机记录和跟踪软件测量滴滴的转移和滑动速度.
主要成果:
- 滴滴运动从滑动转变为滚动,在磁力影响下通过推进.
- 滑动速度在普通铁粒子上增加,而滚动在疏水性铁粒子上占主导地位.
- 高度的铁粒子或层宽度导致滑动速度和磁键数的急剧增加.
- 新生儿滴在滚动和滑动运动期间都粘附在磁铁表面上.
结论:
- 铁粒子功能化在磁场下显著改变滴滴运动动态.
- 该研究提供了对优化铁流体液滴控制的见解,用于先进的应用.
- 了解这些动态是开发更稳定和功能性的铁流体系统的关键.
相关概念视频
Colloidal precipitates
593
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
593
Solubility
17.5K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
17.5K
Surface Tension of Fluid
304
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...
304


