散装液体粘度如何塑造毛细管悬浮液的形状
Christoph Haessig1, Jasper Landman1, Elke Scholten1
1Physics and Physical Chemistry of Foods, Wageningen University, PO Box 17, 6700 AA Wageningen, the Netherlands.
Journal of colloid and interface science
|September 10, 2024
概括
在毛细管悬浮液中改变散装液体粘度会影响材料特性. 较高的粘度会削弱结构,导致液体桥梁更快地断裂,从而降低强度和屈服应力.
科学领域:
- 材料科学 材料科学 材料科学
- 体科学 体科学 体科学
- 类风病学 类风病学 类风病学
背景情况:
- 毛细管悬浮是三元液体-液体-固体系统.
- 粒子是通过液体桥梁连接在第二不混合的流体.
- 散装液体粘度是调特性的一个关键参数.
研究的目的:
- 研究散装液体粘度对毛细血管悬浮结构和风湿学的影响.
- 了解粘度,网络连接和机械性能之间的关系.
- 使用实验和模拟进行全面分析.
主要方法:
- 用颗粒和水进行毛细血管悬浮的实验研究.
- 使用混合物 (多德干/二尼尔甲酸盐) 和油调节散装液体粘度.
- 风病学特征 (储存/损失模块,产量压力).
- 对焦激光扫描显微镜用于结构可视化.
- 分子动力学 (MD) 对粒子桥相互作用的模拟.
主要成果:
- 增加的散装液体粘度降低了悬浮强度,屈服应力和屈服应变.
- 较高的粘度导致粒子网络的相互连接性减少.
- 数字模拟表明,较早的液体桥断裂随着粘度的增加而发生.
- 结构分析将质变化与网络变化相关联.
结论:
- 散装液体粘度是控制毛细血管悬浮力学的一个关键因素.
- 液体桥稳定性和网络结构的粘度诱导的变化决定了材料的反应.
- 这些发现为设计具有定制rheological属性的新材料提供了洞察力.
相关概念视频
Surface Tension, Capillary Action, and Viscosity
27.6K
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...
27.6K
Rise of Liquid in a Capillary Tube
1.7K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
1.7K
Viscosity
5.8K
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
The SI unit of viscosity is...
5.8K
Capillarity in Fluid
162
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...
162
Colloids and Suspensions
1.7K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
1.7K
Types of Fluids
212
Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
212


