| 초록 |
This paper presents a microfluidic approach towards the fabrication of highly monodisperse polyurea microcapsules containing paraffins. The synthesis consists of the two steps; emulsification of n–octadecane in aqueous phase and polycondensation for polyurea shell formation. The resultant polyurea microcapsules with encapsulated n–octadecane underwent rapid and repeated liquid–solid phase transformations on fluctuated temperature. The size of the microcapsules was efficiently controlled by tuning the flow rate of two phases. The morphology, structural, crystallization and phase change behaviour of microcapsules were investigated by optical, FTIR, scanning electron microscopy (SEM), differential scanning calorimetry (DSC). |
