Aim of this study was to prepare microcapsules for self-healing applications in polymers and composites. Microcapsules containing epoxy carbon nanotube dispersion were prepared by solidification of Poly(methyl methacrylate) [PMMA] between resin and water interface. Dichloromethane (DCM) was selected as solvent for epoxy and PMMA. Similar systems have already been used by various groups without carbon nanotubes which revealed that two parameters have significant effect on microcapsule formation and morphology. If the first parameter epoxy/PMMA (core/shell) weight ratio exceeds 6/1, then fractured microcapsules start to appear. The second parameter is evaporation temperature of DMC. It was shown that a porous capsule surface is formed during encapsulation process if the evaporation temperature is raised over 40oC. Therefore, 40oC was selected in the current study as evaporation temperature. Preliminary results showed that microcapsules tend to stick each other and form agglomorates over 1:1 w/w epoxy/PMMA ratio. Hence, 1:1 w/w epoxy/PMMA ratio was used for rest of the experiments. Four different mixing speeds (300, 500, 800, 1000 rpm) and carbon nanotube content (0.25, 0.50, 1.00, 2.00 w/w %) were employed during the encapsulation process. The microcapsules were characterized by FTIR, SEM, confocal microscopy and thermal analysis techniques. Microcapsules having 55-10 micron average diameters were obtained by increasing mixing speed from 300 to 1000 rpm. Increasing mixing speed caused a decrease in particle size distribution, while it also gives rise to a more homogeneous nanotube distribution inside the microcapsules. Roughness of microcapsule surface increased with increasing nanotube content and mixing speed. SEM images of microcapsules showed that microcapsules with various types of core-shell morphology are formed during the encapsulation process. Thermal analysis results showed that epoxy content of microcapsules varies independent of the reaction parameters.