中文摘要：

运用通过低活性、柔性异弗尔二异氰酸酯与二乙烯三胺的界面聚合反应合成了以正十八烷为囊芯的聚脲微胶囊相变材料，通过采用红外光谱、光学显微镜、热重分析等对其进行表征，并考察了乳化剂聚氧乙烯仲辛酚醚-10（OP-10）用量和正十八烷浓度对微胶囊形成及形貌的影响．结果表明：在0．5％OP-10和0．3g／mL正十八烷的优化条件下，制备的微胶囊相变材料为球形好、破损低、粒径在1～6μm之间的微球，而且具有良好的热稳定性；微胶囊的内核为正十八烷，外壳为聚脲；采用气相色谱法测得的正十八烷的负载量为35．4％．

英文摘要：

Polyurea microcapsules cOntaining n-octadecane were prepared via the interfacial polymerization of lowactivity flexible isophorone diisocyanate and diethylene triamine, and then were characterized by means of FT-IR, optical microscopy and TG. Moreover, the effects of emulsifier （ polyoxyethyloctylpheny ether-10, marked with OP- 10） content and n-octadecane content on the formation and morphology of the microcapsules were investigated. The results show that, in the optimal conditions, namely, an OP-10 mass fraction of 0. 5% and a n-octadecane content of 0. 3 g/mL, well-shaped microcapsule spheres composed of n-octadecane （the core） and polyurea （the shell） can be obtained, and that the microcapsules, 1 -6 μm in diameter, possess low leakag e and good thermal stability. In addition, GC results indicate that the n-octadecane content in the microcapsules is 35.4%.