| 초록 |
Microcapsules are fine particles whose size ranges from 50nm to 2,000㎛, composed of an excipient polymeric shell and incipient active core component. Microencapsulation of phase-change materials(PCM) has been studied extensively because PCMs can absorb, store and release thermal energy as their physical state changes. Several polymers such as polystyrene, polyurea, nylon, melamine-formaldehyde (M-F) resin, etc., have been tested as the shell material. In this work, melamine-formaldehyde was used for encapsulation of PCM and they were treated with diisocyanate in order to improve the melamine-formaldehyde microcapsule shell. The encapsulation efficiency was measured by DSC. The shape and size of the microcapsules were confirmed by optical microscopy, SEM, and particle size analysis. |
