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- 保温材料与建筑节能
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原位聚合法制备微胶囊相变材料及热工性能研究
作者：程璐璐，杨建森，曹向阳，杨平，张圆圆
（宁夏大学 土木与水利工程学院，宁夏 银川 750021）
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。
关键词：微胶囊相变材料；正十八烷；十二醇；氨基树脂；热分析
中图分类号：TU55+1 文献标识码：A 文章编号：1001-702X（2019）07-0089-05
Research on thermal properties of microcapsule phase change materials prepared by in-situ polymerization
CHENG Lulu，YANG Jiansen，CAO Xiangyang，YANG Ping，ZHANG Yuanyuan
（School of Civil Engineering and Hydraulic Engineering，Ningxia University，Yingchuan 750021，China）
Abstract：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.
Key words：microcapsule phase change material，n-octadecane，dodecanol，amino resin，thermal analysis