Enzyme‐induced ferrification of hydrogels for toughening of functional inorganic compounds

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dc.contributor.authorMilovanovic, Marko
dc.contributor.authorRauner, Nicolas
dc.contributor.authorCivelek, Emre
dc.contributor.authorHoltermann, Tim
dc.contributor.authorJid, Oualid El
dc.contributor.authorMeuris, Monika
dc.contributor.authorBrandt, Volker
dc.contributor.authorTiller, Jörg C.
dc.date.accessioned2024-02-27T13:54:02Z
dc.date.available2024-02-27T13:54:02Z
dc.date.issued2022-04-01
dc.description.abstractEnzyme-induced mineralization (EIM) has been shown to greatly enhance the mechanical properties of hydrogels by precipitation of calcium salts. Another feature of such hydrogels is their high toughness even when containing finely nanostructured mineral content of ≈75 wt%. This might be useful for bendable materials with high content of functional inorganic nanostructures. The present study demonstrates that EIM can form homogeneous nanostructures of water-insoluble iron salts within hydrogels. Crystalline iron(II) carbonate precipitates urease-induced within polyacrylate-based hydrogels and forms platelet structures that have the potential of forming self-organized nacre-like architectures. The platelet structure can be influenced by chemical composition of the hydrogel. Further, amorphous iron(II) phosphate precipitates within hydrogels with alkaline phosphatase, forming a nanostructured porous inorganic phase, homogeneously distributed within the double network hydrogel. The high amount of iron phosphate (more than 80 wt%) affords a stiffness of ≈100 MPa. The composite is still bendable with considerable toughness of 400 J m−2 and strength of 1 MPa. The high water content (>50%) may allow fast diffusion processes within the material. This makes the iron phosphate-based composite an interesting candidate for flexible electrodes and demonstrates that EIM can be used to deliberately soften ceramic materials, rendering them bendable.en
dc.identifier.urihttp://hdl.handle.net/2003/42360
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-24197
dc.language.isoende
dc.relation.ispartofseriesMacromolecular materials and engineering;307(8)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/de
dc.subjectamorphous iron phosphateen
dc.subjectcomposite materialsen
dc.subjectdouble network hydrogelsen
dc.subjectenzyme-induced ferrificationen
dc.subjectiron carbonateen
dc.subject.ddc660
dc.subject.rswkHydrogelde
dc.subject.rswkEisenphosphatde
dc.subject.rswkEisencarbonatde
dc.subject.rswkEnzyminduktionde
dc.subject.rswkMineralisationde
dc.subject.rswkVerbundwerkstoffde
dc.titleEnzyme‐induced ferrification of hydrogels for toughening of functional inorganic compoundsen
dc.typeTextde
dc.type.publicationtypeResearchArticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationM. Milovanovic, N. Rauner, E. Civelek, T. Holtermann, O. E. Jid, M. Meuris, V. Brandt, J. C. Tiller, Enzyme-Induced Ferrification of Hydrogels for Toughening of Functional Inorganic Compounds. Macromol. Mater. Eng. 2022, 307, 2200051. https://doi.org/10.1002/mame.202200051de
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1002/mame.202200051de

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