正十二醇相变储热微胶囊的制备与表征  

Preparation and Characterization of Thermal Energy Storage Microcapsulated n-Dodecanol by Phase Change

作　　者：余飞[1] 陈中华[1,2] 曾幸荣[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]广东省特种涂料工程技术研究开发中心,广东广州510520

出　　处：《高分子材料科学与工程》2009年第6期135-138,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50073006);广州市建设科技发展基金项目(2006-05)

摘　　要：以相变物质正十二醇为芯材,三聚氰胺-甲醛树脂为壁材,采用原位聚合法合成了具有高储热密度的相变储热微胶囊,使用DSC、SEM和激光散射粒度分析仪等手段对其进行了表征。结果表明,乳化剂种类、乳化搅拌速度、正十二醇投料质量分数对微胶囊相变潜热及相变材料包封效率有重要影响。当采用SMA和OP-10复配(质量比4∶1)为乳化剂,乳化搅拌速度为4500r/min,正十二醇投料质量分数为69%时,可制备出相变温度为24℃,相变潜热为167J/g,平均粒径为30μm左右的表面光滑的球状微胶囊,正十二醇包封效率高达97.5%。Microcapsules with high thermal energy storage density by phase change were synthesized by in-situ polymerization using melamine-formaldehyde resin as shell and n-dodecanol as core. Microcapsules were characterized by DSC, SEM and laser particle diameter analyzer. The results show that phase change latent heat of microcapsules and n-dodecanol encapsulation efficiency are affected greatly by type of emulsifiers, emulsification stirring speed and charging mass fraction of n-dodecanol. When charging mass fraction of n-dodecanol is 69 %, spherical n-dodecanol microcapsules with smooth surface were prepared by using the mixture of SMA and OP-10 with mass ratio of 4 ： 1 as emulsifier under emulsification stirring speed of 4500 r/min. The phase change latent heat of microcapsule is 167 J/ g at 24 ℃, the mean particle diameter of microcapsule is about 30 μm and n-dodecanol encapsulation efficiency reaches to 97.5 %.

关 键 词：微胶囊 正十二醇 相变材料 储热 三聚氰胺-甲醛树脂 

分 类 号：TB34[一般工业技术—材料科学与工程]