TY - JOUR A1 - Pavlitschek, Tom A1 - Gretz, Markus A1 - Plank, Johann T1 - Microcapsules prepared from polycondensate-based cement superplasticizers via layer-by-layer self assembly on melamine-formaldehyde core templates T2 - Journal of Applied Polymer Science N2 - 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. KW - Construction Chemistry KW - Cement KW - Construction Chemical Additives Y1 - 2021 UR - https://opus4.kobv.de/opus4-rosenheim/frontdoor/index/index/docId/1731 UR - https://doi.org/10.1002/app.37981 VL - 127 IS - 5 SP - 3705 EP - 3711 PB - Wiley ER -