纳米工程有孔用于热管理
Lu An1, Massimigliano Di Luigi1, Donald Petit2
1Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States.
ACS applied nano materials
|December 13, 2024
概括
研究人员用纳米网络设计了多孔的二氧化,以获得卓越的绝热. 这种材料实现了超低的导热率 (0.018 W/m K),非常适合能源关键的应用和电池安全.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 储能 储能 储能 储能 储能 储能
背景情况:
- 有效的热管理对于能源关键应用至关重要,包括节能建筑和敏感电子设备.
- 固体材料中的纳米级多孔结构是调节热传输的关键.
研究的目的:
- 为了纳米工程多孔材料来控制建筑过渡.
- 在纳米结构中实现超热绝缘,以实现先进的热管理.
主要方法:
- 控制多孔的纳米工程,使其从中型多孔到纳米网络的过渡.
- 材料性质的表征,包括导热率,多孔性,表面积和孔积.
- 与陶纤维框架交叉连接多孔二氧化,以评估机械和热绝缘性能.
主要成果:
- 实现了0.018W/mK的超低导热率.
- 呈现出高孔隙性 (92.05%),特定表面积 (504 m2/g) 和孔隙体积 (2.37 cm3/g).
- 在交叉连接的框架中证明了2.8 MPa的拉力扬斯模量,并保持了绝热.
结论:
- 纳米工程的策略使得可创建多孔的二氧化与纳米网络的特殊的隔热.
- 开发的材料为可充电离子电池提供了一个有前途的热跑道缓解策略.
- 这种方法为各种能源应用的纳米结构中的超热绝缘铺平了道路.
相关概念视频
01:19Mechanism of heat transfer
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...
01:14Mechanisms of Heat Transfer
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 heat.
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 heat.
01:24Microbial Corrosion
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...