In the present investigation, a phase change cold storage material incorporating ester-based functional groups is synthesized through the combination of polyethylene glycol and lauric acid. Through manipulation of the molecular weight of polyethylene glycol and the molar ratio of the reactants, successful adjustment of the phase change temperature of the products is achieved. Subsequently, the synthesized phase change cold storage materials undergo comprehensive characterization and analysis. Additionally, the results of the structural modulation and modification of organic phase change materials are examined at the molecular level. The objective of this study is to elucidate the influence of intermolecular hydrogen bond strength and density on the phase change temperature range of phase change materials. The results indicate that the prepared series of samples can meet the cold storage requirements within the temperature range of −10 ∼ 30 °C. Among them, the maximum latent heat of melting is 92.45 J/g, and the lowest supercooling temperature is 4.01 °C. This study presents an effective chemical approach for developing phase change cold storage materials, serving as a fundamental basis for realizing phase change energy storage over a wide temperature range, and offering a new option for phase change cold storage materials catering to diverse temperature demands.

中文翻译：

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利用聚乙二醇与月桂酸酯化的宽温度范围相变冷能


在本研究中，通过聚乙二醇和月桂酸的组合合成了包含酯基官能团的相变蓄冷材料。通过控制聚乙二醇的分子量和反应物的摩尔比，成功调节了产物的相变温度。随后，对合成的相变蓄冷材料进行全面的表征和分析。此外，在分子水平上检查有机相变材料的结构调制和改性的结果。本研究的目的是阐明分子间氢键强度和密度对相变材料相变温度范围的影响。结果表明，所制备的系列样品能够满足-10∼30℃温度范围内的冷藏要求。其中，最大熔化潜热为92.45 J/g，最低过冷温度为4.01℃。该研究提出了开发相变蓄冷材料的有效化学方法，为实现宽温度范围内的相变储能奠定了基础，为满足不同温度需求的相变蓄冷材料提供了新的选择。