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pH Modulated Formation of Complexes with Various Stoichiometry between Polymer Network and Fe(III) in Thermosensitive Gels Modified with Gallic Acid

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cris.lastimport.scopus2024-02-12T20:36:51Z
dc.abstract.enThermoresponsive gels based on N-isopropylacrylamide functionalized with amino groups were modified with gallic acid, with gallate (3,4,5-trihydroxybenzoic) groups being introduced into the polymer network. We investigated how the properties of these gels were affected at varying pH, by the formation of complexes between the polymer network of the gels and Fe3+ ions (which form stable complexes with gallic acid, exhibiting 1:1, 1:2, or 1:3 stoichiometry, depending on pH). The formation of complexes with varying stoichiometry within the gel was confirmed using UV-Vis spectroscopy, and the influence of such complexes on swelling behavior and volume phase transition temperature were investigated. In the appropriate temperature range, complex stoichiometry was found to strongly affect the swelling state. Changes in the pore structure and mechanical properties of the gel caused by the formation of complexes with varying stoichiometry were investigated using scanning electron microscopy and rheological measurements, respectively. The volume changes exhibited by p(NIPA-5%APMA)-Gal-Fe gel were found to be greatest at close to human body temperature (~38 °C). Modification of thermoresponsive pNIPA gel with gallic acid opens new opportunities for the development of pH- and thermosensitive gel materials.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKarbarz, Marcin
dc.contributor.authorKościelniak, Patrycja
dc.contributor.authorKaniewska, Klaudia
dc.date.accessioned2024-01-25T16:37:43Z
dc.date.available2024-01-25T16:37:43Z
dc.date.copyright2023-05-29
dc.date.issued2023
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number6
dc.description.versionFINAL_PUBLISHED
dc.description.volume9
dc.identifier.doi10.3390/GELS9060447
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/115901
dc.identifier.weblinkhttps://www.mdpi.com/2310-2861/9/6/447/pdf
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofGels
dc.relation.pages447
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.engallic acid
dc.subject.eniron complex
dc.subject.enpH-sensitive gel
dc.subject.enthermosensitive gel
dc.subject.envolume phase transition
dc.titlepH Modulated Formation of Complexes with Various Stoichiometry between Polymer Network and Fe(III) in Thermosensitive Gels Modified with Gallic Acid
dc.typeJournalArticle
dspace.entity.typePublication