基于碳甲基的形状稳定的相变材料具有超低的泄漏率和出色的低温缓冲性能
Dengshuang Guo1, Yuwei Zhang1, Kuncong Chen2
1School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
Carbohydrate polymers
|August 16, 2025
概括
一种新的碳氧甲基基托/酸/聚乙烯糖醇400复合材料为冷链运输提供了优越的温度缓冲. 这种环保的替代品为聚钢泡提供了出色的机械强度和抗菌性能.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 可持续包装 包装的可持续性
背景情况:
- 在冷链物流中广泛使用的聚乙烯泡,由于降解不良和温度缓冲能力有限,带来了环境挑战.
- 资源浪费和污染是与温度控制供应链中的传统包装材料相关的重大问题.
研究的目的:
- 开发一种新的,形状稳定的相变材料 (FSPCM),作为冷链运输包装的可持续和高性能替代品.
- 通过创建具有增强热,机械和抗菌性能的复合材料来解决传统材料的局限性.
主要方法:
- 通过预制后增强策略与冷干燥相结合,使用碳甲基,基酸盐和聚乙烯糖醇400制造FSPCM.
- 描述FSPCM的热缓冲能力,机械性能 (Young的模量),抗泄漏性,以及对特定细菌菌株的抗菌功效.
主要成果:
- 该FSPCM证明了聚乙烯甘醇400 (50.37%) 的高封装效率,导致强大的温度缓冲优于聚烯泡.
- 卓越的机械性能 (Young的模量: 10.27 MPa),优异的抗泄漏性 (在80°C下5天后没有泄漏),以及显著的抗菌活性 (>99.5%对抗大肠杆菌和金黄色杆菌).
- 该材料表现出卓越的热稳定性和生物相容性,表明其适合实际应用.
结论:
- 开发的FSPCM为冷链运输提供了一个有前途的绿色包装解决方案,克服了聚乙烯泡的环境和性能缺点.
- 创新的制造方法使直接成型成为所需的形状,促进在包装箱和其他冷链物流需求的实际应用.
- 这项研究为设计高效和可持续的低温缓冲解决方案的先进材料提供了宝贵的见解.
更多相关视频
08:59A Freeze-Thawing Method to Prepare Chitosan-Polyvinyl alcohol Hydrogels Without Crosslinking Agents and Diflunisal Release Studies
Published on: January 14, 2020
17.8K
11:17Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
Published on: January 19, 2016
22.1K
相关概念视频
01:19Phase Changes
4.5K
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...
4.5K
02:39Phase Transitions: Melting and Freezing
13.1K
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...
13.1K
01:23Membrane Fluidity
156.0K
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.
156.0K
00:59States of Matter and Phase Changes
1.2K
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...
1.2K
01:17Ion Exchange
658
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
658
02:33Phase Transitions: Sublimation and Deposition
17.9K
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...
17.9K