| 초록 |
The preparation of microcapsules for application in the fabrication of self-healing composites has been paid more attention. The microcapsules must possess sufficient strength to remain intact during processing of the host polymer, yet rupture when the polymer is damaged. To provide long shelf-life the capsules must be impervious to leakage and diffusion of the encapsulated healing agent for considerable time. A series of microcapsules were prepared by in situ polymerization method with poly(urea-formaldehyde) as a shell material and a siloxane methacrylate-containing compound as a core material. The chemical structure of microcapsule was characterized using infrared spectroscopy. The size, size distribution, morphology, and wall thickness were controlled by processing parameters such as agitation rate and core-shell ratio, and they were characterized by optical microscopy and scanning electron microscopy (SEM). |
