石蜡高岭土相变储热材料的制备及表征Preparation and characterization of paraffinkaolin phase change thermal storage material
张瑞君;陈国良;宋春草;何伟;
摘要(Abstract):
为克服太阳能不连续与不稳定引起的建筑物室内温度波动的现象,文章以石蜡与高岭土为试验原料,制备一种用于建筑墙体隔热保温的新型高岭土基相变储热材料。采用XRD,SEM,FTIR和DSC测试方法研究了相变储热材料的结构与性能。结果表明:高岭土具有良好的吸附性能,能物理吸附大量的石蜡至其孔隙结构;石蜡高岭土相变储热材料的熔融和冷凝温度分别为27.5,25.3℃,熔融和冷凝相变潜热值分别为33.5,32.9J/g;服役期间,石蜡未从储热材料中泄露,也未与高岭土化学键合;经1 000次循环试验后,储热材料的相变温度与相变潜热值变化不显著。高岭土优异的吸附能力赋予了该储热材料优异的吸储热能力。高岭土与石蜡较好的物理化学相容性使储热材料具有优良的化学稳定性。
关键词(KeyWords): 高岭土;石蜡;相变储热材料;结构;吸储热性能
基金项目(Foundation): 国家重点研发计划(2018CBL27122);; 河南省研究生教育优质课程项目(hnyjs2018kc01);; 河南省高等学校重点科研项目计划(19A560014)
作者(Authors): 张瑞君;陈国良;宋春草;何伟;
DOI: 10.13941/j.cnki.21-1469/tk.20220505.002
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