GBBS RBI GENERAL PRESENTATION

Transcription

1 GENERAL PRESENTATION Complete denomination: Group for biomineralization and biocomposite systems, Ruđer Bošković Institute Location (city, country): Zagreb, Croatia Director: Tomo Antičić Contact person in NEWGEN: Maja Dutour Sikirić, Damir Kralj, Darija Jurašin Working Group involvment: WG1 and WG3 Staff: 10 staff (4 scientist, 5 Res Assistants, 1 technitian) Research topics: mechanisms and kinetics of precipitation processes of biologicaly important sparingly soluble salts (calcium phosphates, calcium carbonates), interactions with the additives industrial crystalization biomimetic bone substitute materials selfassembly processes in systems containing surfactants application of electron paramagnetic resonance spectroscopy Researchers expertises: interactions at organic-inorganic interfaces design and synthesis of novel materials basic and advanced physico-chemical characterization methods GBBS Ruđer Bošković Institute Bijenička cesta Zagreb- CROATIA

2 Calcium Phosphates Controling morphology and phase composition with additives calcium phosphate dihydrate, DCPD Organic-inorganic composites coatings Inorganic inorganic composites Calcium phosphate Calcium phosphate Calcium phosphate TiO2 nanotubes Substrate in the presence of pasp Relativna % Tpropusnost 2 days ACP based coating 7 days 12 days * 5 *µm * 17 days * ** wavenumber valni broj / cm / cm -1 Induction experiment 1 µm in the presence of the surfactant SDS OCP based coating Influence on the morphology

3 Calcium Carbonates Combined approach precipitation kinetics and structural analysis 10.4 Potentiometry / kinetics ph ppm pglu 1 ppm pglu ppm pglu 0 ppm pglu t/s SEM / morphology v / v c(pasp) / ppm XRD, FTIR / structure v / v calcite + plys 0.5 Electroforetic mobility ζ / mv -10 calcite -20 calcite + pasp calcite + pglu ph c(plys) / ppm Growth kinetics models Models of interaction

4 Calcium Carbonates Precipitated calcium carbonate homemade multifunctional computer controled bench scale chemical reactor Viker precise control of all process parameters final product with desired physico-chemical characteristics (mineral structure, crystals size distribution, crystal morphology,...)

5 Conventional and Oligomeric Surfactants Solution design and physico-chemical characterization of novel surfactants Catanionic mixtures Solid state physico-chemical characterization of mixtures of oppositely charged l surfactants thermal behaviour of surfactants in solid state j - degree of oligomerization -3 log[(cmcγ / j) / mol dm ] j T

6 EPR Spectroscopy Fe 3+ CO 2- H o Characterisation of materials identification of free radicals, metal ions, impurities, radiation induced radicals... structural determination Magnetsko polje (mt) Magnetic field (mt) Mn Reaction studies kinetics, monitoring catalytic processes, ROS... activity of enzymes... Functional studies activation and transport of drugs protein structure and dynamics

7 Facilities Materials characterization Spectroscopy EPR, UV-VIS, FTIR Microscopy optical microscopes (with hot stage), fluorescent microscope Particle size analysis - characterization of nano and micron sized particles Specific surface area analyzer & porosimeter Thermal analysis Ion chromatography EPR spektrometer Bruker FT-EPR 580 Elexsys Continous wave and pulse mode 1- and 2-D measurements, temperature range 4-370K Zetasizer Nano ZS, Malvern Particle size distribution and zeta potential Gemini 2380, Micromeritics Specific surface area and pore size distribution