The production of an amine derivative of gellan gum, named GG-EDA, was here obtained by functionalizing the polysaccharide backbone with pendant ethylenediamine moieties. The obtained derivative was characterized by spectroscopic, colorimetric, chromatographic and rheological analyses to study the effect of the free amino groups on the physicochemical properties of the macromolecule. A titration experiment was conducted to study the acid-base dissociation constants in aqueous media for the carboxylic and amino groups in the GG-EDA and to shed light on the possibility that the derivative shows a polyampholyte structure under physiological conditions. The rheological analysis conducted on both physical and chemical hydrogels based on GG-EDA revealed that the presence of amino groups plays a fundamental role in influencing the viscoelastic properties and stability of the produced samples.
Fiorica C., Pitarresi G., Palumbo F.S., Mauro N., Federico S., Giammona G. (2020). Production and physicochemical characterization of a new amine derivative of gellan gum and rheological study of derived hydrogels. CARBOHYDRATE POLYMERS, 236, 1-11 [10.1016/j.carbpol.2020.116033].
Production and physicochemical characterization of a new amine derivative of gellan gum and rheological study of derived hydrogels
Fiorica C.;Pitarresi G.;Palumbo F. S.
;Mauro N.;Federico S.;Giammona G.
2020-01-01
Abstract
The production of an amine derivative of gellan gum, named GG-EDA, was here obtained by functionalizing the polysaccharide backbone with pendant ethylenediamine moieties. The obtained derivative was characterized by spectroscopic, colorimetric, chromatographic and rheological analyses to study the effect of the free amino groups on the physicochemical properties of the macromolecule. A titration experiment was conducted to study the acid-base dissociation constants in aqueous media for the carboxylic and amino groups in the GG-EDA and to shed light on the possibility that the derivative shows a polyampholyte structure under physiological conditions. The rheological analysis conducted on both physical and chemical hydrogels based on GG-EDA revealed that the presence of amino groups plays a fundamental role in influencing the viscoelastic properties and stability of the produced samples.File | Dimensione | Formato | |
---|---|---|---|
2020 Carb Polym GG-EDA.pdf
Solo gestori archvio
Descrizione: Articolo principale
Tipologia:
Versione Editoriale
Dimensione
2.41 MB
Formato
Adobe PDF
|
2.41 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.