从甲索基聚乙烯糖醇和芳香酸化物中提取的新型相变材料的开发
Alejandro Angel-López1, Ángel Norambuena1,2, C Arriaza-Echanes1
1Doctorado en Ciencias de Materiales Avanzados, Vicerrectoría de Investigación, Universidad Mayor, Santiago 8580745, Chile.
Polymers
|July 29, 2023
概括
新型有机固体-液体相变材料 (PCM) 由甲聚乙烯甘醇 (MPEG) 和芳香酸 (ACs) 合成. 这些高性能PCM表现出可调节的热性能和优良的稳定性,用于储能应用.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 热力工程是热力工程中的一个.
背景情况:
- 开发高效的固体-液体相变材料 (PCM) 对热能存储至关重要.
- 有机PCM提供可调节的特性,但需要谨慎的结构设计,以获得最佳的性能和稳定性.
- 甲聚乙烯甘醇 (MPEG) 和芳香酸 (ACs) 是新型PCM合成的合适构建基.
研究的目的:
- 合成和表征一种新的有机固体-液体相变材料 (PCM) 家族.
- 研究分子重量和链接核结构对PCM特性的影响.
- 评估合成的PCM的热稳定性和储能能力.
主要方法:
- 通过MPEG和芳香性酸乙烯 (terefthaloyl 化物和 isophthaloyl 化物) 之间的凝结反应进行合成.
- 使用可溶性测试,FT-IR,NMR光谱,极化光学显微镜 (POM),热重力测量分析 (TGA) 和差分扫描热度计 (DSC) 的表征.
- 评估热循环稳定性的评估.
主要成果:
- 通过光谱方法成功合成并证实了新的有机PCM.
- 较高分子量PCM在室温下显示结晶性和球状物大小增加.
- 在高达400°C的温度下,PCM具有良好的热稳定性,点/结晶点在-39.9°C至60.2°C之间,并且具有显著的能量储存能力 (高达198.8 J/g).
- 替代组的方向影响了超冷却,过渡温度和能量储存能力.
结论:
- 一个新的基于MPEG和AC的高性能有机PCM家族被开发出来.
- 合成的PCM表现出可调节的热特性和用于储能的良好热稳定性.
- 结构修改,特别是链接核心和MPEG分子量,显著影响PCM性能.
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