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相关概念视频

Capillarity in Fluid01:19

Capillarity in Fluid

249
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...
249
Rise of Liquid in a Capillary Tube01:18

Rise of Liquid in a Capillary Tube

1.9K
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.
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Capillary Exchange01:28

Capillary Exchange

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The cardiovascular system's chief role is to disseminate gases, nutrients, waste, and other substances to the body's cells. Small molecules like gases, lipids, and lipid-soluble substances directly diffuse through capillary wall endothelial cell membranes. Glucose, amino acids, and ions, including sodium, potassium, calcium, and chloride, use transporters for facilitated diffusion via membrane-specific channels. Glucose, ions, and bigger molecules may also pass through intercellular...
4.9K
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

28.1K
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...
28.1K

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相关实验视频

Updated: Jul 18, 2025

Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
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Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers

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弹性毛囊滚动转移将软材料编织成空间结构.

Yue Zhang1, Mengtian Yin1, Baoxing Xu1

  • 1Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA, USA.

Science advances
|August 23, 2023
PubMed
概括

研究人员开发了一种新的机械转移方法,以创建复杂的3D软材料结构. 这种技术可以精确控制机器人和电子行业的编织模式和奇拉性.

科学领域:

  • 材料科学 材料科学 材料科学
  • 软物质物理学 软物质物理学
  • 机器人工程 机器人工程 机器人工程

背景情况:

  • 软材料对于可穿戴电子产品,生物医学设备和软机器人等先进应用至关重要.
  • 现有的方法缺乏用于将软材料组装成复杂的空间结构的简单技术.

研究的目的:

  • 开发一种用于将软材料组装成各种空间结构的新,简单的技术.
  • 为了证明可控制的编织力,秩序和局部折叠模式.
  • 以各种软材料形式和基板几何体来展示该方法的多功能性.

主要方法:

  • 一种机械转移路径,利用曲线基板在液体表面上的软材料上的旋转运动.
  • 控制地操纵基板曲率和旋转动力学以决定结构形成.
  • 在3D基板上集成不同软材料形式 (电线,带,薄膜).

主要成果:

  • 成功地将软材料编织成各种空间结构,具有可调整的全球性和秩序.
  • 产生具有可编程数和空间分布的局部耳状折叠.
  • 展示独立的编织结构与按需的图案和订单.
  • 制造具有可编程机器人姿势的温度驱动多式联动装置的结构.

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Scalable Stamp Printing and Fabrication of Hemiwicking Surfaces

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相关实验视频

Last Updated: Jul 18, 2025

Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
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Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers

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Material Formation of Recombinant Spider Silks through Aqueous Solvation using Heat and Pressure
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Material Formation of Recombinant Spider Silks through Aqueous Solvation using Heat and Pressure

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Scalable Stamp Printing and Fabrication of Hemiwicking Surfaces
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Scalable Stamp Printing and Fabrication of Hemiwicking Surfaces

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结论:

  • 报告的机械转移路线为创建复杂的3D软材料架构提供了一种简单而通用的方法.
  • 该技术允许精确控制结构特征,为高级应用程序提供量身定制的功能.
  • 开发的空间结构显示了可编程机器人系统和其他软电子设备的前景.