以硅藻土为基材,在高温条件下物理吸附相变材料A,再经冷却、粉碎及真空干燥后制得硅藻土基定形相变复合材料,并对制得的硅藻土基定形相变复合材料的结构形貌、化学组成、热性能、粒径变化进行了测试。研究结果表明,相变材料A被成功吸附至硅藻土孔隙中,且没有发生其他化学变化,硅藻土基定形相变复合材料的熔融温度为143.53℃,熔融焓55.26kJ/kg,储热效率为55.08%,硅藻土对相变材料A的实际吸附率为91.67%;原硅藻土的平均粒径为1316nm,硅藻土基定形相变复合材料的平均粒径为971nm,具有良好的定形效果,在加热至相变材料熔融温度以上仍未发生渗漏。
With diatomite as substrate,phase change material A was adsorbed physically at a high temperature,and then cooled,pulverized and vacuum dried to obtain a shape-stabilized PCM.The morphology,chemical component,thermal properties and particle sizes of the PCM were tested and characterized.Results indicated that the PCM A was successfully impregnated into the pores of diatomite and no chemical interaction occurred.The fusion temperature of the prepared PCM was 143.53℃ with melting enthalpy of 55.26kJ/kg,the thermal storage efficiency was calculated as 55.08% and the actual adsorption efficiency was 91.67%.The particle sizes of diatomite before and after adsorption were 1316nm and 971nm,respectively.No leakage problem occurred when the prepared PCM was heated above phase change temperature,suggesting that the composite had good thermal stability.
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基金资助
国家重点研发计划资助项目(2017YFB0309100);装备预研教育部联合基金项目(6141A02022267);中央高校基本科研业务费专项资金资助项目(JUSRP41910);江苏省“双创计划”双创博士项目([2015]26);江苏省先进纺织工程技术中心开放基金科研项目(XJFZ/2018/04)
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