A novel lauric acid (LA) microcapsule with silica (SiO₂) shell was synthesized by interfacial polymerization. The influence of synthetic conditions on the thermal properties and encapsulation effect of the composite were systematically studied. Scanning electron microscope (SEM), Fourier transformation infrared spectrometer (FT-IR) and X-ray diffractometer (XRD) analyzed the morphology and structure of the composite. The data of differential scanning calorimetry (DSC) showed that the melting enthalpy and encapsulation efficiency of microcapsules prepared under the optimal conditions were as high as 186.6 J/g and 78.6%, respectively. Thermogravimetric analysis (TGA) demonstrated that the microcapsules have excellent thermal stability. In addition, the microencapsulated phase change material did not show significant leakage after being heated at 60°C for 60 min. In summary, the microcapsules prepared in this work have the advantages of simple process, large latent heat, high encapsulation efficiency and excellent thermal reliability, the synthesized microcapsules will have broad application prospects in the field of energy storage.

一种新型的二氧化硅（SiO ₂）月桂酸（LA）微胶囊通过界面聚合合成壳。系统地研究了合成条件对复合材料热性能和包封效果的影响。扫描电子显微镜（SEM），傅立叶变换红外光谱仪（FT-IR）和X射线衍射仪（XRD）分析了复合材料的形貌和结构。差示扫描量热法（DSC）的数据表明，在最佳条件下制备的微胶囊的熔融焓和包封效率分别高达186.6J / g和78.6％。热重分析（TGA）表明，微胶囊具有出色的热稳定性。此外，微囊化的相变材料在60°C加热60分钟后没有显示出明显的泄漏。综上所述，