Probing the effects of polymers on the early stages of calcium carbonate formation by stoichiometric co-titration

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Philipp I. Schodder
  • Maxim B. Gindele
  • Andreas Ott
  • Markus Rückel
  • Roland Ettl
  • Volodymyr Boyko
  • Matthias Kellermeier

Research Organisations

External Research Organisations

  • BASF SE
  • Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU Erlangen-Nürnberg)
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Details

Original languageEnglish
Pages (from-to)9978-9989
Number of pages12
JournalPhysical Chemistry Chemical Physics
Volume24
Issue number17
Publication statusPublished - 17 Mar 2022

Abstract

Potentiometric titrations are a powerful tool to study the early stages of the precipitation of minerals such as calcium carbonate and were used among others for the discovery and characterisation of key precursors like prenucleation clusters. Here we present a modified procedure for conducting such titration experiments, in which the reactants (i.e. calcium and (bi)carbonate ions) are added simultaneously in stoichiometric amounts, while both the amount of free calcium and the optical transmission of the solution are monitored online. Complementarily, the species occurring at distinct stages of the crystallisation process were studied using cryogenic transmission electron microscopy. This novel routine was applied to investigate CaCO3 nucleation in the absence and presence of polymeric additives with different chemical functionalities. The obtained results provide new insights into the critical steps underlying nucleation and subsequent ripening, such as the role of liquid mineral-rich phases and their transformation into solid particles. The studied polymers proved to interfere at multiple stages along the complex mineralisation pathway of calcium carbonate, with both the degree and mode of interaction depending on the chosen polymer chemistry. In this way, the methodology developed in this work allows the mechanisms of antiscalants - or crystallisation modifiers in general - to be elucidated at an advanced level of detail.

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Cite this

Probing the effects of polymers on the early stages of calcium carbonate formation by stoichiometric co-titration. / Schodder, Philipp I.; Gindele, Maxim B.; Ott, Andreas et al.
In: Physical Chemistry Chemical Physics, Vol. 24, No. 17, 17.03.2022, p. 9978-9989.

Research output: Contribution to journalArticleResearchpeer review

Schodder, PI, Gindele, MB, Ott, A, Rückel, M, Ettl, R, Boyko, V & Kellermeier, M 2022, 'Probing the effects of polymers on the early stages of calcium carbonate formation by stoichiometric co-titration', Physical Chemistry Chemical Physics, vol. 24, no. 17, pp. 9978-9989. https://doi.org/10.1039/d1cp05606a
Schodder, P. I., Gindele, M. B., Ott, A., Rückel, M., Ettl, R., Boyko, V., & Kellermeier, M. (2022). Probing the effects of polymers on the early stages of calcium carbonate formation by stoichiometric co-titration. Physical Chemistry Chemical Physics, 24(17), 9978-9989. https://doi.org/10.1039/d1cp05606a
Schodder PI, Gindele MB, Ott A, Rückel M, Ettl R, Boyko V et al. Probing the effects of polymers on the early stages of calcium carbonate formation by stoichiometric co-titration. Physical Chemistry Chemical Physics. 2022 Mar 17;24(17):9978-9989. doi: 10.1039/d1cp05606a
Schodder, Philipp I. ; Gindele, Maxim B. ; Ott, Andreas et al. / Probing the effects of polymers on the early stages of calcium carbonate formation by stoichiometric co-titration. In: Physical Chemistry Chemical Physics. 2022 ; Vol. 24, No. 17. pp. 9978-9989.
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