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Issue 18, 2012
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Magnesium ions and alginate do form hydrogels: a rheological study

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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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Supplementary files

Article information


Submitted
24 Dec 2011
Accepted
09 Mar 2012
First published
02 Apr 2012

Soft Matter, 2012,8, 4877-4881
Article type
Communication

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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