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以高岭土为原料,通过微波合成法制备比表面积大、孔容量高、孔径分布均匀的介孔材料;并以该介孔材料为载体,石蜡为相变材料,采用真空吸附法制备石蜡/介孔复合相变储能材料。以N2-物理吸附脱附法、扫描电镜(SEM)及透射电镜(TEM)测试介孔材料的微观结构,通过FTIR对复合相变储能材料的兼容性进行表征,DSC测定复合相变储能材料的热性能,扩散-渗出圈法确定复合相变储能材料的稳定性。结果表明,所制备的介孔材料比表面积为961.64 m2/g,孔容量为0.854 mL/g,平均孔径为2.78 nm;复合相变储能材料中石蜡的最佳质量分数为50%,相变温度为56.9℃,相变潜热为75.2 J/g;石蜡和介孔材料是简单的嵌合关系,复合相变储能材料具有良好的热稳定性和兼容性。
The mesoporous materials with large specific surface area, high pore volume and uniform pore size distribution were prepared by microwave synthesis using kaolin as raw material. Paraffin was used as the phase change material and the paraffin was mesoporous material Composite phase change energy storage materials. The microstructure of mesoporous materials was tested by N2-physical adsorption desorption, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The compatibility of composite phase change energy storage materials was characterized by FTIR. The phase transition energy The thermal properties of the material, diffusion - exudation circle method to determine the stability of composite phase change energy storage materials. The results showed that the prepared mesoporous material has a specific surface area of 961.64 m2 / g, a pore volume of 0.854 mL / g and an average pore diameter of 2.78 nm. The optimum mass fraction of paraffin wax in the composite phase change energy storage material is 50% The temperature is 56.9 ℃, and the latent heat of phase transformation is 75.2 J / g. Paraffin and mesoporous materials are simple chimeric relations. The composite phase change energy storage material has good thermal stability and compatibility.