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Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach

Calcareous biominerals typically feature a hybrid nanogranular structure consisting of calcium carbonate nanograins coated with organic matrices. This nanogranular organisation has a beneficial effect on the functionality of these bioceramics. In this feasibility study, we successfully employed a fl...

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Autores principales: Demmert, Benedikt, Schinzel, Frank, Schüßler, Martina, Mondeshki, Mihail, Kaschta, Joachim, Schubert, Dirk W., Jacob, Dorrit E., Wolf, Stephan E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6601056/
https://www.ncbi.nlm.nih.gov/pubmed/31167501
http://dx.doi.org/10.3390/ma12111818
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author Demmert, Benedikt
Schinzel, Frank
Schüßler, Martina
Mondeshki, Mihail
Kaschta, Joachim
Schubert, Dirk W.
Jacob, Dorrit E.
Wolf, Stephan E.
author_facet Demmert, Benedikt
Schinzel, Frank
Schüßler, Martina
Mondeshki, Mihail
Kaschta, Joachim
Schubert, Dirk W.
Jacob, Dorrit E.
Wolf, Stephan E.
author_sort Demmert, Benedikt
collection PubMed
description Calcareous biominerals typically feature a hybrid nanogranular structure consisting of calcium carbonate nanograins coated with organic matrices. This nanogranular organisation has a beneficial effect on the functionality of these bioceramics. In this feasibility study, we successfully employed a flow-chemistry approach to precipitate Mg-doped amorphous calcium carbonate particles functionalized by negatively charged polyelectrolytes—either polyacrylates (PAA) or polystyrene sulfonate (PSS). We demonstrate that the rate of Mg incorporation and, thus, the ratio of the Mg dopant to calcium in the precipitated amorphous calcium carbonate (ACC), is flow rate dependent. In the case of the PAA-functionalized Mg-doped ACC, we further observed a weak flow rate dependence concerning the hydration state of the precipitate, which we attribute to incorporated PAA acting as a water sorbent; a behaviour which is not present in experiments with PSS and without a polymer. Thus, polymer-dependent phenomena can affect flow-chemistry approaches, that is, in syntheses of functionally graded materials by layer-deposition processes.
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spelling pubmed-66010562019-07-18 Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach Demmert, Benedikt Schinzel, Frank Schüßler, Martina Mondeshki, Mihail Kaschta, Joachim Schubert, Dirk W. Jacob, Dorrit E. Wolf, Stephan E. Materials (Basel) Article Calcareous biominerals typically feature a hybrid nanogranular structure consisting of calcium carbonate nanograins coated with organic matrices. This nanogranular organisation has a beneficial effect on the functionality of these bioceramics. In this feasibility study, we successfully employed a flow-chemistry approach to precipitate Mg-doped amorphous calcium carbonate particles functionalized by negatively charged polyelectrolytes—either polyacrylates (PAA) or polystyrene sulfonate (PSS). We demonstrate that the rate of Mg incorporation and, thus, the ratio of the Mg dopant to calcium in the precipitated amorphous calcium carbonate (ACC), is flow rate dependent. In the case of the PAA-functionalized Mg-doped ACC, we further observed a weak flow rate dependence concerning the hydration state of the precipitate, which we attribute to incorporated PAA acting as a water sorbent; a behaviour which is not present in experiments with PSS and without a polymer. Thus, polymer-dependent phenomena can affect flow-chemistry approaches, that is, in syntheses of functionally graded materials by layer-deposition processes. MDPI 2019-06-04 /pmc/articles/PMC6601056/ /pubmed/31167501 http://dx.doi.org/10.3390/ma12111818 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Demmert, Benedikt
Schinzel, Frank
Schüßler, Martina
Mondeshki, Mihail
Kaschta, Joachim
Schubert, Dirk W.
Jacob, Dorrit E.
Wolf, Stephan E.
Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach
title Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach
title_full Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach
title_fullStr Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach
title_full_unstemmed Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach
title_short Polymer-Functionalised Nanograins of Mg-Doped Amorphous Calcium Carbonate via a Flow-Chemistry Approach
title_sort polymer-functionalised nanograins of mg-doped amorphous calcium carbonate via a flow-chemistry approach
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6601056/
https://www.ncbi.nlm.nih.gov/pubmed/31167501
http://dx.doi.org/10.3390/ma12111818
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