以聚甲基丙烯酸甲酯（PMMA）为壁材，利用溶剂挥发法制备芳烃油缓释微胶囊。考察了工艺参数对微胶囊粒径大小和表面形貌的影响。结果表明，选择明胶-十二烷基硫酸钠（SDS）作为复合表面活性剂，芯壁材质量比为1：1，剪切速率为700 r/min时，所制备微胶囊大小均匀，平均粒径在60 μm左右，表面光滑，包覆较好。通过热挥发失重实验研究了微胶囊的缓释性能。结果表明，205℃加热4 h，芳烃油微胶囊挥发率只有31.8%，远低于芳烃油的挥发率58.4%。表明微胶囊能够明显减缓芳烃油释放速率，为芳烃油缓释微胶囊在沥青中的应用提供可行性。

Polymethyl methacrylate (PMMA) is used as shell material to prepare aromatic oil slow release microcapsules by solvent evaporation method.The effects of preparation parameters on the particle size and surface topography of microcapsules are investigated.The results show that the prepared microcapsules have good coating performance,smooth surface and uniform sizes with average particle size being about 60 μm when the gelatin-sodium dodecyl sulfate (SDS) is used as composite surfactant,the mass ratio of core material to shell material is 1:1 and the shear speed is 700 r·min^-1.The thermal stability of the microcapsules is studied by thermogravimetric experiments.The results indicate that the evaporation rate of aromatic oil microcapsules is only 31.8% when it is heated for 4 h at 205℃,far lower than 58.4%-the evaporation rate of aromatic oil.It proves that these microcapsules can significantly slow down the release rate of aromatic oil,which provides the feasibility for the application of aromatic oil controlled release microcapsules in asphalt.