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MXene/二氧化硅/六水氯化钙复合相变储热材料的制备及性能

引用本文：范宇飞,赵雪伶,陈立飞.MXene/二氧化硅/六水氯化钙复合相变储热材料的制备及性能[J].上海第二工业大学(中文版),2024,41(2):136-141

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作者	单位
范宇飞	上海第二工业大学 a. 能源与材料学院
赵雪伶	上海第二工业大学 a. 能源与材料学院 b. 上海先进热功能材料工程技术研究中心 c. 上海市工程材料应用与评价重点实验室 d. 上海市热物性大数据专业技术服务平台, 上海 201210
陈立飞	上海第二工业大学 a. 能源与材料学院 b. 上海先进热功能材料工程技术研究中心 c. 上海市工程材料应用与评价重点实验室 d. 上海市热物性大数据专业技术服务平台, 上海 201211

基金项目:上海市科委扬帆计划 (17YF1406600); 上海市教委晨光计划 (18CG68) 资助

中文摘要:六水氯化钙作为一类低温体储热材料, 在蓄热节能方面有着巨大的应用前景。单一的六水氯化钙相变储热材料存在导热系数低和熔化时易泄漏的缺点, 具有较大的内芯和互穿介孔孔道结构的介孔二氧化硅可以解决上述问题。介孔二氧化硅具有低密度, 热膨胀系数小, 折射率低, 比表面积大等优点, 但其导热系数低, 需要与热性能良好的材料复合来增强导热能力。选用MXene 作为导热增强材料, 在其表面上生长介孔二氧化硅, 再把相变材料六水氯化钙负载其中。通过综合热分析仪和红外热成像仪测定, 证明复合相变材料的储热性能、热稳定性和传热速率都有显著提升; 在烘箱中观察六水氯化钙的泄漏情况也明显被载体材料所抑制, 成功制备一种热性能和稳定性俱佳的复合相变储热材料。

中文关键词:六水氯化钙相变储热泄漏 MXene 材料二氧化硅

Preparation and Properties of MXene/Silicon Dioxide/Calcium Chloride Hexahydrate Composite Phase Change Heat Storage Materials

Abstract:As a kind of low temperature bulk heat storage material, calcium chloride hexahydrate has a great application prospect in heat storage and energy saving. However, the single calcium chloride hexahydrate phase change heat storage material has the disadvantages of low thermal conductivity and easy leakage when melting. Mesoporous silicon dioxide with large inner core and interpenetrating mesoporous channel structure can solve the above problems. Mesoporous silicon dioxide has the advantages of low density, low thermal expansion coefficient, low refractive index and large specific surface area. However, it has low thermal conductivity and needs to be combined with other materials with good thermal properties to enhance its thermal conductivity. MXene was used as the thermal conductivity enhancement material, mesoporous silicon dioxide was grown on its surface, and then the phase change material calcium chloride hexahydrate was loaded into it. By means of synchronous thermal analyzer and infrared thermal imager, it is proved that the heat storage performance, thermal stability and heat transfer rate of the composite phase change materials are significantly improved.The leakage of calcium chloride hexahydrate in the oven was also obviously inhibited by the carrier material. A kind of composite phase change heat storage material with excellent thermal properties and stability was successfully prepared.

keywords:calcium chloride hexahydrate phase change heat storage leakage MXene material silicon dioxide

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