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Characterization of Poly(vinyl alcohol)/gelatin films made with winery solid by-product (vinasse) extract by Gülce Bedis Kaynarca; Deniz Damla Altan Kamer; Tuncay Gumus; Osman Sagdıc is a Materials Science article available to read on EtoBox.

What is Characterization of Poly(vinyl alcohol)/gelatin films made with winery solid by-product (vinasse) extract about?

The aim of this study is to examine the effect of grape pomace extract (GP) on the technological, functional and structural properties of Poly (vinyl alcohol) (PVA)/fish gelatin (FG) blend films. The addition of different ratios of GP (0 %, 0.5 %, 1 %, 1.5 % and 2 %) to PVA/FG edible films improved their rheological properties. The complex viscosity value increased exponentially when 2 % GP was added to the composite films compared to samples without any added GP. FTIR results showed that PVA and FG were able to interact with GP. The surface morphology indicated that addition of GP enhanced the intermolecular polymer interactions of the PVA-FG-GP combination. Atomic force microscopy (AFM) revealed that the films with GP had homogenous and smoother surfaces. X-ray diffraction (XRD) results confirmed that the FG and PVA chains interacted with GP, causing structural repositioning. Further confirmation of the effective interaction between PVA, FG and GP came from the decrease in crystallinity as the concentration of GP was increased. The melting temperature (T m ) was enhanced with the addition of GP. The combination of GP with PVA/FG films improved the plasticizer and surfactant prope

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Author

Gülce Bedis Kaynarca; Deniz Damla Altan Kamer; Tuncay Gumus; Osman Sagdıc

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)