摘要
以石蜡为相变材料、SiO2介孔分子筛MCM-41为载体,采用溶液浸渍法制备了石蜡/MCM-41复合相变储能材料。应用SEM与TEM测试了复合材料的微观结构,利用TG-DSC测定了复合材料的相变温度、相变潜热及相变可逆性,通过FTIR对复合材料的兼容性进行了表征。实验表明,复合材料表面孔结构改善了相变可逆性,复合相变储能材料中石蜡的适宜质量分数为40%,相变温度为66.6℃,相变潜热为135.3 J/g。石蜡与MCM-41间是简单的嵌合关系,复合材料具有良好的热稳定性和兼容性。
With paraffin as phase change material, MCM -41 mesoporous silica materials as carrier, the paraffin/MCM- 41 composite phase change thermal energy storage materials were synthesized successfully via solution immersion. The morphology was observed by means of scan electron microscopy （SEM）, transmission electron microscopy （TEM） images, which clearly revealed the structures of molecular sieves and paraffirdMCM -41. The synthesized materials were characterized by means of thermal gravimetry/differential scanning calorimeter（TG- DSC）. The results verified the good thermal stability of the synthesized material. FTIR results confirmed that the paraffin was incorporated into the framework of mesoporous materials. The results show that the paraffin＇s maximum of PCM was 40%, phase change temperature was 66. 6 ~C ,phase change latent heat was 135. 3 J/g;there was no reaction between the paraffin and the silicon dioxide;paraffin was imbedded into the net of silicon dioxide. The form- stable paraffin/MCM -41 composite PCM was considered as an effective latent heat thermal energy storage material due to its good thermal reliability and good chemical compatibility.
出处
《精细化工》
CAS
CSCD
北大核心
2011年第12期1150-1153,共4页
Fine Chemicals
基金
河南省重点科技攻关项目资助(092102310184)~~
关键词
相变材料
浸渍法
石蜡
介孔分子筛
功能材料
phase change material
solution immersion
paraffin
mesoporous molecular sieves
functional materials
