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。
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.
作者
范宇飞
赵雪伶
陈立飞
FAN Yufei;ZHAO Xueling;CHEN Lifei(College of Energy and Materials,Big Data Professional Technical Service Platform,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Advanced Thermal Functional Materials Engineering Technology Research Center,Big Data Professional Technical Service Platform,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Key Laboratory of Engineering Materials Application and Evaluation,Big Data Professional Technical Service Platform,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Hot Physical Property,Big Data Professional Technical Service Platform,Shanghai Polytechnic University,Shanghai 201209,China)
出处
《上海第二工业大学学报》
2024年第2期136-141,共6页
Journal of Shanghai Polytechnic University
基金
上海市科委扬帆计划(17YF1406600)
上海市教委晨光计划(18CG68)资助。
关键词
六水氯化钙
相变储热
泄漏
MXene材料
二氧化硅
calcium chloride hexahydrate
phase change heat storage
leakage
MXene material
silicon dioxide
