摘要
以石蜡为芯材,廉价的聚脲和三聚氰胺甲醛树脂为壁材,采用原位聚合法和界面聚合法成功地制备了双壳层石蜡微胶囊。用差示扫描量热仪（DSC）和TG-DTA分析仪对石蜡微胶囊的性能进行了分析和表征,并讨论了乳化速度和搅拌速度对微胶囊性能的影响。实验结果表明,在乳化速度为9000r·min^-1,搅拌速度为300r·min^-1下,所制备的微胶囊包裹完全、表面光洁、平均粒径为4μm,相变潜热高达180.5J·g^-1,耐热温度达200℃。考察了双壳层的聚合机理,分析结果表明最佳的乙二胺（EDA）与甲苯二异氰酸酯（TDI）摩尔比为1：1.1-1：1.3,三聚氰胺与甲醛摩尔比为1：1.5-1：1.8。
Using paraffin as core material and the cheaper 2,4-diisocyanate （TDI）, ethylene siamine （EDA）, melamine and formaldehyde as shell materials, the double-shell microencapsulated phase change material （MicroPCM） for heat energy storage applications was synthesized by the interfacial and in situ polymerization. The synthesized microcapsules were characterized and analyzed by SEM and DCS; the mechanism of polymerization for the double-shell formation was studied, and the influences of emulsifying speed and stirring rate on the microencapsulation process were investigated too. The experiments show that the microcapsules prepared under the emulsifying speed of 9000 r.min^-1 and the stirring rate of 300 r-min^-1 have smooth morphologies with an average particle size of 4.0μm; the latent heat of phase transformation of the prepared microcapsules reaches 180.5 J.g^-1 and its temperature resistance is up to 200℃. It was found that the optimal molar ratio of EDA to TDI is 1：1.1-1：1.3, and the best molar ratio of melamine to formaldehyde is 1：1.5-1： 1.8.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2008年第5期844-849,共6页
Journal of Chemical Engineering of Chinese Universities
基金
广东省自然科学基金项目(06025657)
广东省绿色化学品重点实验室项目资助
关键词
微胶囊
石蜡
原位聚合
界面聚合
microcapsule
paraffin
in-situ polymerization
interfacial polymerization
