目的 制备二元复合芯材相变材料微胶囊，讨论不同芯材比对微胶囊性能和表观形貌的影响。方法 以正十二醇和正癸醇为芯材，以尿素、甲醛单体为原料合成脲醛树脂作为壁材，用原位聚合法制备二元复合芯材相变材料微胶囊。利用扫描电子显微镜(SEM)、热重分析(TGA)、差示扫描量热仪(DSC)等对样品进行分析和表征。结果 随着正十二醇和正癸醇质量比的增大，所得微胶囊相变温度也随之升高，而相变潜热和分解温度变化不明显，微胶囊粒径分布较为均匀，但所得微胶囊表面越来越粗糙，且含有细小颗粒，团聚现象越来越明显。结论 当芯材质量比为1︰1时，所得微胶囊外观近似呈现为球形，表面致密光滑，分散性最好。

The work aims to prepare binary composite core microencapsulated phase change material and investigate the effects of different ratio dodecanol/decanol on the properties and morphologies of the microcapsules. The binary composite core microencapsulated phase change material was prepared by in-situ polymerization with binary combination phase change material dodecanol/decanol as the core materials and urea and methyl aldehyde as the raw material for the wall. The properties of the products were analyzed and characterized by SEM, TGA and DSC. Experimental results showed that the phase change temperature of the microcapsules went up with the increased proportion of dodecanol, while the latent heat and decomposition temperature did not change significantly. Microcapsule particle size was distributed relatively uniformly, but the surface of the microcapsules was getting more and more rough with tiny particles and the aggregation phenomenon was more and more obvious with the increased proportion of dodecanol. In conclusion, when the proportion of dodecanol and decanol keeps 1︰1, the appearance of the microcapsule is nearly spherical, the surface is dense and smooth, and it disperses best.