相关实验视频
Updated: Jan 8, 2026
08:13
Preparation of Biopolymer Aerogels Using Green Solvents
Published on: July 4, 2016
18.2K
基于AlN的气凝热冷却器通过增强的声子导电和不受约束的液体毛细管能力来实现
Shengnan Meng1, Hongxing Wang1, Qian Zhao1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai, China.
Nature communications
|December 11, 2025
概括
研究人员开发了先进的基于AlN的纳米纤维气凝,用于透气冷却. 这些新型热冷却器提供优越的液体传输和快速散热,优于现有材料的性能,用于有效的热管理.
科学领域:
- 材料科学 材料科学 材料科学
- 热力工程是热力工程中的一个.
- 纳米技术 纳米技术
背景情况:
- 透气冷却使用液体冷却液相变为散热.
- 多孔陶是必不可少的,但受到毛细血管作用和声子散射的限制.
- 这些局限性阻碍了高效和快速的冷却性能.
研究的目的:
- 为增强的透气热冷却器设计基于AlN的纳米纤维气凝.
- 为了克服传统多孔介质在散热方面的局限性.
- 为了改善热管理的液体运输和冷却速度.
主要方法:
- 结合纳米工程和多尺度结构组装技术.
- 创建有垂直对齐通道和单晶纳米纤维的气凝.
- 使用化 (AlN) 作为增强性能的基础材料.
主要成果:
- 实现了前所未有的8.33 ± 0.026毫米s-1的液体运输速度.
- 证明了 156.8 °C s-1 的快速冷却率,比先进材料高五倍.
- 由于气凝通道结构,表现出不受约束的毛细血管.
结论:
- 基于AlN的纳米纤维气凝代表了透气冷却技术的重大进步.
- 开发的热冷却器为苛刻的热管理应用提供了卓越的性能.
- 这项工作为下一代高性能冷却解决方案铺平了道路.
相关概念视频
01:20Mechanisms of Heat Transfer II
4.1K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
4.1K
01:19Mechanism of heat transfer
1.8K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.8K
01:14Mechanisms of Heat Transfer
1.6K
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
1.6K
01:14Mechanisms of Heat Transfer I
5.9K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
5.9K
01:17Steady, Laminar Flow Between Parallel Plates
755
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
755
01:09Deriving the Speed of Sound in a Liquid
886
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
The speed of sound in fluids can be derived by considering a mechanical wave...
886