浮动薄聚合物薄膜的毛细纹
Jiangshui Huang1, Megan Juszkiewicz, Wim H de Jeu
1Department of Physics, University of Massachusetts, Amherst, MA 31003, USA.
Science (New York, N.Y.)
|August 4, 2007
概括
超薄的聚合物薄膜在接触水时会出现纹. 这项研究开发了一种简单的方法,使用纹图案来测量薄膜弹性和厚度,帮助材料科学研究.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物物理 聚合物物理
- 表面科学是一门学科.
背景情况:
- 几十纳米厚的自由漂浮的聚合物薄膜,在受到液滴的毛细血管力时表现出纹不稳定性.
- 纹模式的特点是纹的数量和长度,为材料特性提供了洞察力.
研究的目的:
- 开发一种计量技术,用于测量超薄聚合物薄膜的弹性和厚度.
- 为了验证有关纹不稳定性和模式选择的理论预测.
- 建立一种研究薄膜粘弹性反应的方法.
主要方法:
- 在超薄的聚合物薄膜上使用水滴诱导毛细体力诱导的纹.
- 通过量化纹的数量和长度来分析纹模式.
- 结合纹长度和数量的缩放关系,创建一个计量学.
主要成果:
- 纹的数量与薄膜的弹性特性和所施加的毛细血管力直接相关.
- 这项研究证实了对纹的图案选择和明确的长度尺度的理论预测.
- 为测量超薄膜的弹性和厚度建立了一个经过验证的计量学.
结论:
- 超薄聚合物薄膜中的纹图案为计量学提供了可靠的基础.
- 开发的方法提供了一个简单的,低成本的方法来表征薄膜的特性.
- 薄膜放松动态揭示了对超薄材料粘弹性行为的洞察力.
相关概念视频
01:18Rise of Liquid in a Capillary Tube
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.
01:19Capillarity in Fluid
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...