耐用的一维液体注入表面,用于实际的滴向凝结增强
Seyed Ahmadreza Kia1, Hossein Pakzad1, Behzad Rezaee1
1Center of Excellence in Energy Conversion (CEEC), Department of Mechanical Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box, Tehran 11365-9567, Iran.
Langmuir : the ACS journal of surfaces and colloids
|April 17, 2025
概括
这项研究开发了使用紫外线和油在上耐用,低成本的液体注入表面 (LIS). 增强的表面提高了凝结效率和耐腐蚀性,为各种应用提供了可扩展的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 纳米技术 纳米技术
背景情况:
- 液体注入表面 (LIS) 显示出由于可调的表面特性,如接触角度 (CA) 和接触角度歇斯底里 (CAH) 的凝结增强的潜力.
- 现有的LIS技术面临挑战,包括耐用性差,制造成本高,以及可扩展性问题,限制了其实际实施.
- 开发强大且具有成本效益的LIS对于推进热传递,抗结冰和微流体应用至关重要.
研究的目的:
- 在不使用危险材料的情况下,使用紫外线启动的表面修饰在上制造耐用,低成本,一维的LIS.
- 调查紫外线暴露时间和滑剂粘度对LIS表面特性和性能的影响.
- 为了评估与裸体和现有文献相比,制造的LIS的凝结增强,耐腐蚀性和耐久性.
主要方法:
- 基板被不同粘度的油和十甲基cyclopentasiloxane (D5) 覆盖.
- 表面在短期 (10小时) 和长期 (取决于凝时间) 的时间内暴露在紫外线 (UV) 光下,以创建化学结合的滑剂层.
- 进行了接触角 (CA) 和接触角歇斯底里 (CAH) 测量,以描述表面的湿透性.
- 进行了电化学腐蚀试验,以评估耐腐蚀性.
- 在各种降温温度下进行了冷凝试验,以量化冷凝增强.
主要成果:
- 所有制造的LIS都展示了具有高接触角度 (>100°) 和低接触角度歇斯底里 (<10°) 的化学结合滑剂.
- 与裸体相比,LIS显示了腐蚀电流密度的显著降低 (高达两次数量级).
- 用5 cSt的油和10小时的紫外线照射处理的表面在不同次冷却水平下增强了29%39%的凝结.
- 与现有的文献基准相比,制造LIS的耐用性提高了350%.
结论:
- 紫外线启动的表面修饰提供了一个可扩展,具有成本效益和环保的方法,用于在上创建持久的LIS.
- 开发的LIS具有出色的抗腐蚀性能,并显著提高了凝结效率.
- 这项技术为改进热管理系统和其他需要高效水滴操纵的应用提供了有前途的解决方案.
相关概念视频
01:22Surface Tension of Fluid
172
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...
172
02:57Surface Tension, Capillary Action, and Viscosity
27.2K
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...
27.2K
01:09Colloidal precipitates
441
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...
441