Combination of sorbitol and glycerol, as plasticizers, and oxidized starch improves the physicochemical characteristics of films for food preservation

Berenice González-Torres, Miguel Ángel Robles-García*, Melesio Gutiérrez-Lomelí, J. Jesús Padilla-Frausto, Claudia Luz Navarro-Villarruel, Carmen Lizette Del-Toro-sánchez, Francisco Rodríguez-Félix, Arturo Barrera-Rodríguez, Mireya Zoila Reyna-Villela, María Guadalupe Avila-Novoa, Francisco Javier Reynoso-Marín

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The aim of this work was to use glycerol (Gly) and sorbitol (Sor) as plasticizers with oxidized starch potato (OS) to produce biodegradable and environmentally friendly films, and to demonstrate the resulting physicochemical and functional viability without subtracting the organoleptic characteristics of the food. Analyses by water vapor permeability (WVP), attenuated total reflection Fourier transform infrared spectra (ATR-FTIR), scanning electron microscopy (SEM), tensile strength (TS), and transparency (UV) showed that the best film result was with 1.5 g of Gly and 2.0 g of Sor, conferred shine, elasticity 19.42 ± 6.20%, and mechanical support. The starch oxidized to 2.5%, contributing a greater transparency of 0.33 ± 0.12 and solubility of 78.90 ± 0.94%, as well as less permeability to water vapor 6.22 ± 0.38 gmm−2 d−1 kPa−1. The films obtained provide an alternative for use in food due to their organic compounds, excellent visual presentation, and barrier characteristics that maintain their integrity and, therefore, their functionality.

Original languageEnglish
Article number3356
JournalPolymers
Volume13
Issue number19
DOIs
StatePublished - 1 Oct 2021

Bibliographical note

Funding Information:
Funding: This work was supported by the Consejo Nacional de Ciencia y Tecnología (CONACyT) of Mexico through a scholarship granted to Berenice González-Torres [No. 888694].

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Films
  • Glycerol (Gly)
  • Native starch (NS)
  • Oxidized starch (OS)
  • Plasticizers
  • Sorbitol (Sor)

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