石蜡/改性粉煤灰定形相变材料的制备及热性能研究  

Preparation and thermal properties of paraffin/modified fly ash form-stable phase change material

作　　者：高慧 孟多[1] GAO Hui;MENG Duo(School of Civil and Architectural Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《新型建筑材料》2023年第4期1-6,49,共7页New Building Materials

基　　金：辽宁省自然科学基金面上项目(2022-MS-038);辽宁省教育厅青年基金项目(JQL201915403)。

摘　　要：以石蜡(PA)为相变芯材,以经酸浸法处理的改性粉煤灰(mFA)为封装基体,采用真空浸渍工艺制备PA/mFA定形相变材料。通过熔融泄漏测试、FT-IR、DSC、蓄放热性能试验研究了PA/mFA定形相变材料的化学相容性、相变热物性等。结果表明,m(PA):m(mFA)=1∶4时,PA/mFA定形相变材料基本无泄漏,PA与mFA为物理掺混;PA/mFA定形相变材料的相变温度为22.6℃,符合人体舒适温度,相变潜热较高,为41.3 J/g;PA/mFA定形相变材料熔化和凝固过程中温度变化均滞后于环境温度变化。Paraffin(PA)was used as the phase change material and modified fly ash(mFA)treated by acid leaching method as the encapsulation matrix,and PA/mFA form-stable phase change material was prepared by vacuum impregnation process.The chemical compatibility and phase change thermal properties of PA/mFA form-stable phase change material were studied by melt leakage test,FT-IR,DSC,and heat storage and release performance test.The results show that when the mass ratio of paraffin to fly ash is m(PA):m(mFA)=1:4,PA/mFA form-stable phase change material has no leakage of melt PA,and PA and mFA are physically blended.The phase transition temperature of PA/mFA form-stable phase change material is 22.6℃,conforming to the comfortable temperature of the human body,the phase change latent heat is 41.3 J/g.The temperature change during melting and solidification of PA/mFA form-stable phase change material lag significantly behind the change of ambient temperature.

关 键 词：定形相变材料 改性粉煤灰 真空浸渍 固废利用 相变储能 

分 类 号：TU55[建筑科学—建筑技术科学]