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Updated: Jul 15, 2026

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

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Published on: August 2, 2012

碳氧甲基纤维素作为格劳伯基于盐的低温PCM加厚剂的影响

Jay Thakkar¹, Sai Bhargav Annavajjala², Margaret J Sobkowicz¹

¹Department of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USA.

Materials (Basel, Switzerland)

|May 25, 2024

概括

这项研究使用碳甲基纤维素 (Na-CMC) 稳定了一种新型相变材料 (PCM). 较低分子量Na-CMC变体 (25万和9万) 有效地防止了Glauber中的相位分离和超冷却.

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.
热力工程是热力工程中的一个.

背景情况:

换相材料 (PCM) 对于热能储存至关重要.
欧特克斯格劳伯盐提供低温相位过渡能力.
稳定PCM对于可靠的性能至关重要.

研究的目的:

为了优化稳定一个优质的格劳伯盐PCM用于制冷应用 (+5°C至+12°C).
调查碳糖甲基纤维素 (Na-CMC) 分子重量对PCM稳定性和性能的影响.
为了确保高可重复性,并尽量减少PCM配方中的次冷却.

主要方法:

使用三个Na-CMC变体 (700,000,250,000和90,000分子量) 制备和改进PCM配方.
使用差分扫描热度计 (DSC),T史和风病学测试评估PCM稳定.
分析离子度和热循环性能.

主要成果:

具有250,000和90,000分子重量的Na-CMC有效地稳定了PCM,防止相位分离和减缓结晶.
较高分子量Na-CMC (700,000) 由于凝形成中断而无效.
最佳配方实现了130J/g的潜热,在热循环后没有超冷却.

结论:

具有特定分子重量的碳甲基纤维素 (Na-CMC) 对于稳定欧性格劳伯盐PCM至关重要.
优化的Na-CMC稳定增强了PCM可靠性,用于制冷应用中的热能存储.
在结晶动力学和基于其分子重量的Na-CMC所需度之间存在权衡.

关键词:

在CMC中,CMC是CMC.格劳伯的盐是没有的.这是PCM的PCM.储存冷藏室的冷藏室是一个冷库.盐水合物盐水合物硫酸二氧化碳酸盐十水合物热能储存是热能储存的方法之一.厚化剂是一种加厚剂.

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