原位聚合法制备微胶囊相变材料及热工性能研究  

Research on thermal properties of microcapsule phase change materials prepared by in-situ polymerization

作　　者：程璐璐 杨建森[1] 曹向阳 杨平 张圆圆[1] CHENG Lulu;YANG Jiansen;CAO Xiangyang;YANG Ping;ZHANG Yuanyuan(School of Civil Engineering and Hydraulic Engineering,Ningxia University,Yingchuan 750021,China)

机构地区：[1]宁夏大学土木与水利工程学院

出　　处：《新型建筑材料》2019年第7期89-93,共5页New Building Materials

基　　金：国家自然科学基金项目(51568056);宁夏大学研究生创新项目(GIP2018052)

摘　　要：以相变蜡、正十八烷和十二醇为芯材,氨基树脂为壁材,采用原位聚合法制备了适合建筑材料使用的微胶囊相变材料,借助扫描电镜图像法、差示扫描量热法和热重分析法对其进行表征,研究了芯材种类、乳化剂用量、预聚体滴加速度对微胶囊相变材料相变温度、相变潜热、热重等热性能的影响.结果表明:正十八烷微胶囊和十二醇微胶囊相变材料近球颗粒表面光滑,粒径分布均匀,成囊率高;当十二醇/氨基树脂微胶囊乳化剂用量为8%,预聚体滴加时间在60 min时,反应较充分,相变温度为23.09℃,相变潜热为61.30 J/g,耐200℃的高温,热稳定性好,适合用于相变储能材料.The phase change wax,n-octadecane and dodecanol were used as the core materials,and the amino resin was used as the wall material,the microcapsule phase change material suitable for building materials was prepared by in-situ polymerization method. It was characterized by means of scanning electron microscopy(SEM),differential scanning calorimetry(DSC)and thermogravimetric analysis(TG). The effects of core material type,emulsifier dosage and pre-polymer droplet acceleration on the thermal properties of phase change temperature,phase change enthalpy and thermogravimetry of microcapsule phase change materials were investigated. The results show that the n-octadecane microcapsules and the dodecyl alcohol microcapsules have a smooth surface,uniform particle size distribution and high capsular ratio. When the dodecanol/amino resin microcapsule emulsifier mass fraction is 8% and the prepolymerization time is about 60 minutes,the reaction is relatively complete, the phase change temperature is 23.09℃,the latent heat of phase change is 61.30 J/g,and the high temperature is resistant to 200℃. Therefore,it is suitable for phase change energy storage materials.

关 键 词：微胶囊相变材料 正十八烷 十二醇 氨基树脂 热分析 

分 类 号：TU551[建筑科学—建筑技术科学]