@article{PavlitschekGretzPlank2013, author = {Pavlitschek, Tom and Gretz, Markus and Plank, Johann}, title = {Microcapsules prepared from polycondensate-based cement superplasticizers via layer-by-layer self assembly on melamine-formaldehyde core templates}, series = {Journal of Applied Polymer Science}, volume = {127}, journal = {Journal of Applied Polymer Science}, number = {5}, publisher = {Wiley}, pages = {3705 -- 3711}, year = {2013}, abstract = {Novel microcapsules were prepared from colloidal core-shell particles by acid dissolution of the organic core. Weakly crosslinked, monodisperse and spherical melamine-formaldehyde polycondensate particles (diameter ∼ 1 μm) were synthesized as core template and coated with multilayers of an anionic polyelectrolyte via layer-by-layer deposition technique. As polyelectrolytes, an anionic naphthalenesulfonate formaldehyde polycondensate that is a common concrete superplasticizer and thus industrially available, and cationic poly(allylamine hydrochloride) were used. Core removal was achieved by soaking the core-shell particles in aqueous hydrochloric acid at pH 1.6, resulting in hollow microcapsules consisting of the polyelectrolytes. Characterization of the template, the core-shell particles, and the microcapsules plus tracking of the layer-by-layer polyelectrolyte deposition was performed by means of zeta potential measurement and scanning electron microscopy. The microcapsules might be useful as microcontainers for cement additives.}, language = {en} }