Abstract
In this paper we used curcumin as a functionalizing agent of gelatin films with the aim to get antioxidant materials with modulated physico-chemical properties. To this aim, we prepared gelatin films at different contents of curcumin up to about 1.2 wt%. The as-prepared films, as well as glutaraldehyde crosslinked films, were submitted to several tests: swelling, water solubility, differential scanning calorimetry, X-ray diffraction, mechanical tests and curcumin release. The radical scavenging activity of the as-prepared films is similar to that of free curcumin, indicating remarkable antioxidant properties. All the other tested properties vary as a function of curcumin content and/or the presence of the crosslinking agent. In particular, the films exhibit sustained curcumin release in different solvents. Thanks to its biocompatibility, biodegradability and lack of antigenicity, gelatin uses span from food processing to packaging and biomaterials. It follows that the modulated properties exhibited by the functionalized materials developed in this work can be usefully employed in different application fields.
Highlights
IntroductionOne—is a natural polyphenol extracted from the rhizomatous plant Curcuma Longa (Turismeric)
Curcumin—(1E,6E)-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-diCurcumin—(1E,6E)-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione—one—is a natural polyphenol extracted from the rhizomatous plant Curcuma Longa (Turismeric)a natural polyphenol extracted from the CurcumaLonga (Turmeric) of of the Ginger family [1] (Figure 1).rhizomatousIn solution itplant exhibits a keto-enol tautomerism the [1] (Figure 1).In solution it exhibits a keto-enol tautomerism and shows and shows polymorphism in the solid state, where it exists just as the keto-enol tautomer polymorphism in the solid state, where it exists just as the keto-enol tautomer [2]. [2].Publisher’s Note: MDPI stays neutral with regard to jurisdictional
We have previously shown that functionalization of gelatin films with a polyphenol, namely quercetin, provides materials with remarkable antioxidant properties, tailored swelling and mechanical properties [12]
Summary
One—is a natural polyphenol extracted from the rhizomatous plant Curcuma Longa (Turismeric). A natural polyphenol extracted from the Curcuma. Longa (Turmeric) of of the Ginger family [1] (Figure 1).rhizomatous. In solution itplant exhibits a keto-enol tautomerism the [1] (Figure 1). In solution it exhibits a keto-enol tautomerism and shows and shows polymorphism in the solid state, where it exists just as the keto-enol tautomer polymorphism in the solid state, where it exists just as the keto-enol tautomer [2]. Publisher’s Note: MDPI stays neutral with regard to jurisdictional In solution it exhibits a keto-enol tautomerism and shows and shows polymorphism in the solid state, where it exists just as the keto-enol tautomer polymorphism in the solid state, where it exists just as the keto-enol tautomer [2]. [2].
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