石蜡/膨胀珍珠岩复合相变储能材料的研究

摘要

以膨胀珍珠岩为吸附材料,石蜡为相变储能材料,制备了石蜡/膨胀珍珠岩复合相变储能材料;运用扩散-渗出圈法确定了膨胀珍珠岩的最佳吸附量为65%（质量分数,下同）;采用DSC及SEM对最佳吸附量的石蜡/膨胀珍珠岩复合相变储能材料的相转变过程及微观结构进行研究。结果表明：膨胀珍珠岩的内部孔隙基本被石蜡完全填充,其自身成为了密实颗粒;复合相变储能材料的相变温度与石蜡的相变温度基本一致,其相变潜热与对应质量分数下石蜡的相变潜热相当。%Paraffin and expanded perlite composite phase change energy-storage material is prepared with expanded perlite as absorption material and paraffin as phase change energy-storage material.The diffused-exudative circle method is used to determine the best adsorption quantity of 65 % for expanded perlite.The phase transition process and microstructure of composite phase change energy-storage materials with the best adsorption quantity are researched by DSC and SEM.The results show that the micropore of expanded perlite particle is almost completely filled by paraffin and becomes close-grained particles;the phase change temperature of composite phase change energy-storage material is basically similar with that of paraffin and its phase change latent heat is corresponded with that of paraffin in the composite materials.