| 초록 |
Cinnamide moiety-containing polydimethylsiloxane (CA-PDMS) was prepared and used as a healing agent. Photo-cross-linking behavior of CA-PDMS was investigated by UV-vis and FT-IR spectroscopy. Depending photoirradiation time, CA-PDMS generated viscous liquid or gum which has recoating capability when scribed with a razor blade. CA-PDMS was microencapsulated with urea-formaldehyde polymer and mean diameter and size distribution of the microcapsules could be controlled by agitation rate. The surface and shell morphology of the microcapsules was investigated by SEM. The prepared microcapsules were integrated into enamel paint to create a self-healing coating. It was confirmed by microscopy that, when the self-healing coating is damaged, the healing agent is released from ruptured microcapsules and fills the damaged region. It is successfully demonstrated by SEM, anticorrosion test, and electrochemical test that the self-healing coating system repeatable self-healing function. |
