一种稳定且可视化的基于脂肪酸的相过渡材料,通过固相分子自组装来构建,用于热管理
Chunda Ji1, Jianbin Huang1, Yun Yan1
1Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University Beijing 100871 China jichunda@pku.edu.cn.
RSC advances
|July 12, 2024
概括
本研究介绍了一种稳定,可视化的基于脂肪酸的相过渡材料 (P-S/PA),用于热管理. 它可以防止泄漏,并保持1000个循环的性能,从而实现高效的热能储存和释放.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 储能 储能 储能 储能 储能 储能
背景情况:
- 脂肪酸是有效的热管理,但遭受泄漏,限制其应用.
- 由于泄漏导致的不稳定性阻碍了脂肪酸在热储和释放系统中的使用.
- 防止热失控对于先进的热管理解决方案至关重要.
研究的目的:
- 开发一种稳定且可视化的基于脂肪酸的相过渡材料.
- 为了克服热管理应用中脂肪酸泄漏的问题.
- 创建具有增强热稳定性和视觉相位过渡指示的材料.
主要方法:
- 固态分子自我组装策略使用聚二甲基化物 (PDDA),二甲基硫酸盐 (SDBS) 和棕酸 (PA).
- 利用静电和疏水相互作用来封装和稳定脂肪酸.
- 通过1000个热周期研究材料的稳定性,并通过传导率的变化评估视觉相位过渡.
主要成果:
- 成功构建了一个稳定的PS/PA材料,在相位过渡期间防止了棕酸泄漏.
- 1000个循环后,相位过渡度显示最小的变化 (<1%),表明出色的稳定性.
- 该材料在相位过渡期间显示出显著的,可见的传导率变化 (0%至68%).
- 通过热压重塑,保持性能,显示温度可调.
结论:
- 开发的PS/PA材料为基于脂肪酸的热管理提供了稳定和可视化的解决方案.
- 分子自组装有效地防止泄漏,并确保相变材料的长期性能.
- 这种材料显示出在热能储存,释放和热失控预防方面的应用潜力很大.
相关概念视频
01:23Membrane Fluidity
152.0K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
152.0K
02:31Phase Transitions
19.0K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.0K
02:39Phase Transitions: Melting and Freezing
12.4K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.4K
02:33Phase Transitions: Sublimation and Deposition
17.1K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
17.1K
01:19Phase Changes
4.2K
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
4.2K
00:59States of Matter and Phase Changes
938
The internal energy of a substance—the total kinetic energy of all its molecules and the potential energy of their associated forces—depends on the strength of the intermolecular forces in the condensed phases and the pressure exerted on the substance. The internal energy of a substance is the highest in the gaseous state, the lowest in the solid state, and intermediate in the liquid state. Phase transitions are caused by changes in physical conditions, such as temperature and...
938