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Effect of xanthan gum on the physical and mechanical properties of gelatin-carboxymethyl cellulose film blends

Paper ID Volume ID Publish Year Pages File Format Full-Text
19792 43129 2016 9 PDF Available
Title
Effect of xanthan gum on the physical and mechanical properties of gelatin-carboxymethyl cellulose film blends
Abstract

•Physical and mechanical properties of gelatin-CMC films were best improved with 5% xanthan gum added.•The xanthan gum addition showed higher mechanical strength than comparable gelatin-CMC film.•X-ray diffraction (XRD) analysis showed a diminished crystalline peak.•Xanthan gum increased UV light shielding along with reduced visible light transparency.

The aim of this study is to develop composite edible films from three different polymers to induce cross-link reactions that improved the quality of films made from two polymer types. Gelatin-carboxymethyl cellulose (CMC)-xanthan gum films were prepared by casting to study effects from the addition of different concentrations (0, 5, 10, 15, 20 and 25%, w/w solid) of xanthan gum to gelatin-CMC film. Physical and mechanical properties of the respective films were evaluated. The addition of xanthan gum increased the thickness, moisture content and water vapour permeability of gelatin-CMC film (p < 0.05). Furthermore, Ultraviolet (UV) light shielding increased along with reduced visible light transparency (p < 0.05) and increased thermal stability (Tg) (p < 0.05). No new functional groups formed although slight shifts in intensity values by Fourier Transform Infrared (FTIR) spectroscopy were observed. X-ray diffraction (XRD) analysis showed a diminished crystalline peak. The resulted films also demonstrated lower tensile strength with diminished elongation at the break point, as well as higher puncture force and lower puncture deformation, indicating higher puncture resistance than comparable gelatin-CMC film. Overall, gelatin-CMC film with xanthan gum (5%, w/w solid) demonstrated improved physical and mechanical properties more than films prepared from comparable formulations.

Keywords
Gelatin; Carboxymethyl cellulose; Xanthan gum; Blended films; Physical properties; Mechanical properties
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Effect of xanthan gum on the physical and mechanical properties of gelatin-carboxymethyl cellulose film blends
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food Packaging and Shelf Life - Volume 9, September 2016, Pages 55–63
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us