Issue 18, 2012
From the journal:

Soft Matter

Magnesium ions and alginate do form hydrogels: a rheological study†

Fuat Topuz,a   Artur Henke,a   Walter Richteringb  and  Jürgen Groll*c  

* Corresponding authors

a DWI e.V. and Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstr. 50, 52074 Aachen, Germany

b Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany

c Department and Chair of Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
E-mail: juergen.groll@fmz.uni-wuerzburg.de
Fax: +49 93120173500
Tel: +49 93120173510

Abstract

Our study shows that magnesium ions which have so far been considered as non-gelling ions for alginate do induce alginate gelation. Rheology is used to examine effects of alginate chemical composition as well as alginate and magnesium ion concentration. Gelation in this system occurs at ca. 5–10 times higher concentration of ions than reported for calcium-based gels. Alginate network formation with magnesium ions is very slow and is typically accomplished within 2–3 hours. Gelation with magnesium ions is also strongly dependent on alginate chemical composition as the presence of long guluronic units privileges faster gel formation.

Graphical abstract: Magnesium ions and alginate do form hydrogels: a rheological study

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Article information

DOI
https://doi.org/10.1039/C2SM07465F
Article type
Communication
Submitted
24 Dec 2011
Accepted
09 Mar 2012
First published
02 Apr 2012

Soft Matter, 2012,8, 4877-4881

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Magnesium ions and alginate do form hydrogels: a rheological study

F. Topuz, A. Henke, W. Richtering and J. Groll, Soft Matter, 2012, 8, 4877 DOI: 10.1039/C2SM07465F

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