PEG/多孔火山岩复合相变材料的制备及其表征  

Preparation and characterization of PEG/porous volcanic rock as composite phase change material

作　　者：佟禹 何丽红[1,2] 朱洪洲[1,2] 

机构地区：[1]重庆交通大学交通土建材料国家地方联合工程实验室,重庆400074 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《化工新型材料》2014年第5期120-122,共3页New Chemical Materials

基　　金：国家自然科学基金资助项目(51178491);交通运输部科技项目(2012-319-814-200);广西省交通运输厅科技计划项目(桂交科2013-11)

摘　　要：基于相变理论,选用聚乙二醇(PEG)作为相变材料,多孔火山岩作为基体,运用真空吸附及环氧包封试验方法,制得PEG/多孔火山岩复合相变材料;采用FTIR、DSC等试验手段分别对PEG/多孔火山岩复合相变材料的储热性能、热稳定性和力学性能进行表征。结果表明:PEG均匀地吸附在火山岩的多孔结构中,平均吸附率为16.17%;经环氧树脂包封后,190℃相变材料不会发生泄漏;PEG、多孔火山岩间没有新物质生成,仅为物理结合;复合相变材料的相变起始温度为41.9℃,相变焓为40.61J/g;导热系数为0.558W/(m·K);压碎值为17.9%。Based on theory of phase transitions,polyethylene glycol（PEG）was chosed as a phase change material, porous volcanic rock as a matrix.The PEG/porous volcanic rock composite phase change material was prepared by vacuum impregnation method,afterwards was encapsulated by a thin layer of cured epoxy resin.Thermal storage properties,thermal stability and mechanical property were characterized by DSC,FTIR and other test methods,respectively.Results showed that：PEG adsorbed on the porous structure of the volcanic rock evenly,the average absorption rate was 16.17%.After the encapsulation by epoxy resin,there was no leakage of melted PEG under 190℃.The physical adsorption and good compatibility were found between PEG and porous volcanic rock,ensuring PEG in composites retained a good phase change performance.Phase change enthalpy and onset temperature of the material were about 40.61J/g and 41.9℃,respectively. Thermal conductivity was 0.558W/（m.K）.Crushing value was 17.9%.

关 键 词：聚乙二醇 多孔火山岩 真空吸附法 复合相变材料 

分 类 号：TB34[一般工业技术—材料科学与工程]