在网状表面上扩散的自动气体,用于再生水下超性
1State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China.
ACS applied materials & interfaces
|July 22, 2024
概括
研究人员开发了一种自动驾驶的超网 (SHM),可以在水下迅速恢复其空气膜 (plastron). 这项创新显著提高了防湿表面的稳定性和寿命,用于降低阻力等应用.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 流体动力学 流体动力学
背景情况:
- 水下超疏水表面具有降低阻力,抗和抗腐蚀的潜力.
- 主要的挑战是这些表面上空气薄膜 (塑) 的不稳定性.
- 需要积极的方法来维持或恢复用于实际应用的胎盘.
研究的目的:
- 设计一个自动驱动的气体扩散超网 (SHM),以实现高效的塑回收.
- 调查SHM的气体扩散能力和稳定性增强.
- 为了证明SHM在降低阻力和防应用中的潜力.
主要方法:
- 具有特定结构尺寸的超网 (SHM) 的制造.
- 纳入局部涂层的产生气体的层,以在现场产生塑.
- 在浸泡下测试气体扩散,塑回收和阻抗减速性能.
- 用于单向气体运输的非对称结构的SHM的设计.
主要成果:
- SHM证明了自发和大面积的气体扩散,以简化胎盘补充.
- 使用产生气体的层在现场回收塑,延长了塑的寿命至少48倍.
- 具有不对称结构的SHM通过毛细管压力实现了单向气体输送.
- 实现了37.2%的阻力降低和73.4%的滑动回收系数,在失去了胎盘后.
结论:
- 开发的自动驾驶SHM可促进快速和稳定的胎盘回收,克服了超表面的关键限制.
- 这种简单可扩展的方法显著提高了不湿表面的耐用性和性能.
- 预计这些发现将扩大超技术在海洋和其他非湿领域的应用.
相关概念视频
01:22Surface Tension of Fluid
263
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...
263
02:57Surface Tension, Capillary Action, and Viscosity
27.7K
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...
27.7K