Microcapsules (or microspheres) with small size and narrow size distribution have potential applications as carriers of proteins and polypeptides. However the conventional preparation methods severely limit their real applications. Membrane emulsification technology may become a new preparation method of microcapsules with monodisperse droplets

mild conditions

good stability

low energy consumption and easy to realize mass production. In this paper

studies on membrane emulsification systems and the possible existing problems are summarized

and primary attempts on preparing alginate/chitosan microcapsules are conducted.