Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: Poster: Biopolymers and Biomaterials
CPP 28.3: Poster
Mittwoch, 24. März 2010, 17:30–19:00, Poster C
Mineral Capsules via Mineralization of Emulsions — •Alexander Schulz1, Bernhard Blümich2, and Alexander Böker1 — 1Lehrstuhl für Makromolekulare Materialien und Oberflächen, DWI an der RWTH Aachen e.V., RWTH Aachen University, Germany — 2Lehrstuhl für Makromolekulare Chemie, RWTH Aachen University, Germany
Mineral capsules of hydroxyapatite with diameters in the range of 10 to 300 µ m are prepared by mineralization of a protein-stabilized oil-in-water emulsion.
An oil-in-water emulsion is prepared via vigorous shaking and stabilized by a protein. Subsequently, the water phase is replaced by a supersaturated solution of calcium and phosphate in water, with citrate as an additive, at a slightly alkaline pH. This solution is exchanged frequently by a fresh supersaturated solution, prepared in the same way. After several days, mineral capsules are obtained. The size varies with the parameters of the preparation, as the structure of the mineral and the number of capsules also do. The analysis of the capsules is performed via SEM-imaging of multiple samples taken at different times of mineralization. The mineral is characterized by EDX-spectra taken from the SEM-samples. Thus, optimum parameters for the mineralization procedure could be identified. Further characterization, like crystal structure and porosity of the material, is carried out by X-Ray diffraction (XRD), electron diffraction and NMR.