| Abstract: | In this article, an interfacial polymerization method was employed for micro encapsulation. The wall material was polyurea and the core materials were diethyl (o-) phthalate, dibutyl (o-) phthalate and dioctyl (o-) phthalate. Poly (vinyl alcohol) (PVA) was used as protective colloid and GPE2040 was used as emulsifier. The effects of catalyst in different phases and core materials with different hydrophobicities on the morphology and particle size were studied. It was found that the surface of microcapsules form catalyst in aqueous phase were smoother and the average size was smaller than that with the catalyst in the organic phase and higher hydrophobicity gave smoother morphology. |
