一个光电协同灵活的固体滑动表面,可全天防结冰/防
Ziyuan Chai1, Ziyi Teng1, Pu Guo1
1Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Chemistry, Beihang University, Beijing, 100191, China.
Small methods
|November 13, 2024
概括
研究人员开发了一种用于防冰和除冰应用的新型柔性表面. 这种创新的材料在各种形状上表现出色,即使在极低的温度下也能表现出极好的性能,为充满挑战的环境提供了持久的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 纳米技术纳米技术
背景情况:
- 在表面积累的冰在运输和航空航天领域构成重大风险.
- 传统的刚性防冰材料对于不规则形状的物体和曲的表面是不够的.
- 需要灵活的抗结冰解决方案,适应各种几何形状.
研究的目的:
- 开发具有光电协同性能的柔性固体滑动表面 (FSSS).
- 评估FSSS在平面和曲表面的防冰和除冰能力.
- 评估FSSS在各种环境条件下的长期稳定性和自我愈合特性.
主要方法:
- 使用柔性玄武岩玻璃纤维布,铜,聚氨/碳纳米管混合物和固体滑剂混合物制造FSSS.
- 在低至-80°C的温度下测试抗结冰和脱冰性能.
- 通过长时间暴露在空气,水,酸性和基本性环境中来评估材料的稳定性.
- 评估 -80°C的自我愈合能力.
主要成果:
- 在平面和曲面上,FSSS表现出良好的全天防/除冰性能,即使在-80°C.
- 该材料在暴露于空气 (60天),水 (60天),酸 (pH 1,30天) 和 (pH 13,30天) 时表现出长期稳定性.
- 在FSSS成功地实现了在-80°C的自我愈合功能.
结论:
- 开发的光电协同FSSS为抗结冰和脱冰挑战提供了一个有前途的解决方案.
- 它的灵活性和耐用性使其适合在极端寒冷的环境中应用于多种形状的物体.
- 这种灵活的表面技术为未来的除冰/冰应用提供了一种新的方法.
相关概念视频
01:05Static and Kinetic Frictional Force
One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
However, if two systems are in contact and are stationary relative to one...
01:27Electrostatic Boundary Conditions in Dielectrics
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
01:16Surface Tension and Surface Energy
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
01:30The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
01:27Frost Action on Concrete
Concrete structures in cold climates, such as those along roadsides, can retain moisture. This moisture makes them susceptible to frost-related damage when temperatures fall below freezing. Adding moisture worsens the damage during temperature fluctuations, leading to repeated freezing and thawing. De-icing salts, spread over these structures to melt ice, add to the freeze-thaw cycle, and draw even more moisture into the concrete.
This freeze-thaw cycle primarily causes surface scaling, where...
This freeze-thaw cycle primarily causes surface scaling, where...
01:29Frost Resistant Concrete
Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of entrained...
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of entrained...