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新型PEG₆₀₀₀--MWCNTs形状稳定复合相变材料 (ssCPCMs) 用于热能储存

Cristina Lavinia Nistor¹, Ioana Catalina Gifu¹, Elena Maria Anghel²

¹Polymers Department, National Institute for Research and Development in Chemistry and Petrochemistry-ICECHIM, 202 Spl. Independentei, 060021 Bucharest, Romania.

|July 29, 2023

概括

研究人员开发了新的PEG6000--MWCNTs复合材料,用于隐性热储存. 最佳的组成可以防止PEG6000的泄漏,确保稳定的形状和热循环后高能储能效率.

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:

变相材料 (PCM) 对于潜热储存至关重要.
泄漏和低导热性限制了传统PCM的应用.
开发具有增强热性能的形状稳定PCM (ssPCM) 是必不可少的.

研究的目的:

准备和描述新的PEG6000--MWCNTs复合物作为ssPCMs.
为了确定最佳的PEG6000含量,以防止在热循环过程中泄漏.
评估开发的ssPCM的热性能和稳定性.

主要方法:

通过尿键,将PEG6000和MWCNTs-OH与在位生成的二氧化基质进行共价键.
索尔-凝工艺,以创建有机-无机混合结构.
扫描电子显微镜 (SEM),X射线和拉曼光谱用于形态和结构分析.
热循环测试以评估稳定性和泄漏.

主要成果:

确定了2/1的最佳PEG6000/NCOTEOS摩尔比率 (~91.5%PEG6000),防止了PEG泄漏.
复合材料表现出高相变度 (~153 J/g) 和良好的储存效率 (~84%).
SEM,X射线和拉曼分析证实了该复合物的结构,其中在PEG矩阵内分布.
在450个热循环中,ssPCM表现出卓越的化学稳定性.

结论:

开发的PEG6000--MWCNTs复合物是用于潜热储存的有效ssPCM.
共价连接和基质成功固定了PEG6000,确保了形状稳定性.
该材料具有高能储能能力和长期的热稳定性,适合实际应用.

关键词:

在PCM中使用PEG-酸盐.储能储能是一种储能.潜在的热量是潜在的热量.形状稳定的相变材料是形状稳定的.固体液体相变的过程热特性热特性热特性

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