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Preparation and properties of poly (vinyl alcohol)/sodium caseinate blend films crosslinked with glutaraldehyde and glyoxal

  • Bedriye Ucpinar Durmaz ORCID logo and Ayse Aytac ORCID logo EMAIL logo
Published/Copyright: August 2, 2021
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 41 Issue 9

Abstract

Bio-based films containing poly (vinyl alcohol)/casein have poor mechanical and water vapor barrier properties that limit their use in packaging application. Some properties such as water resistance and tensile strength can be increased by the cross-linking process. For this reason, poly(vinyl alcohol)/sodium caseinate (PVA/SC) blends were crosslinked by adding glutaraldehyde (GLA) and glyoxal (GL) at different ratios in this work. The films were prepared by solution casting technique. Fourier transform infrared analysis (FTIR) confirmed the crosslinking reaction between the components. As a result of the crosslinking, the thicknesses, water vapor barrier properties and water contact angle values of the films have increased. The total soluble matters (TSM) of PVA/SC film decreased with increasing amounts of crosslinkers and GLA crosslinked films exhibited lower TSM. The addition of GLA and GL resulted in more strengthened films as verified by the tensile test. On the other hand, GLA crosslinked films were more flexible than un-crosslinked and GL crosslinked PVA/SC films. The hydrophilic PVA/SC film became more hydrophobic with the increasing amounts of crosslinkers. With the crosslinking, the PVA/SC film became more thermally stable. In conclusion, the crosslinked PVA/SC films were obtained with suitable properties for packaging applications.

Keywords: barrier properties; crosslinking; mechanical properties; poly(vinyl alcohol); sodium caseinate
Corresponding author: Ayse Aytac, Department of Chemical Engineering, Engineering Faculty, Kocaeli University, 41380 Kocaeli, Turkey; and Polymer Science and Technology Programme, Kocaeli University, 41380 Kocaeli, Turkey, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-04-20
Accepted: 2021-06-12
Published Online: 2021-08-02
Published in Print: 2021-10-26

© 2021 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

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https://doi.org/10.1515/polyeng-2021-0131
Keywords for this article
barrier properties; crosslinking; mechanical properties; poly(vinyl alcohol); sodium caseinate

Articles in the same Issue

  1. Frontmatter
  2. Material properties
  3. Study on the properties of composite superabsorbent resin doped with starch and cellulose
  4. Thermal stability, mechanical properties, and gamma radiation shielding performance of polyvinyl chloride/Pb(NO3)2 composites
  5. Effects of talc, kaolin and calcium carbonate as fillers in biopolymer packaging materials
  6. Tribological properties of organotin compound modified UHMWPE
  7. Recent progress on improving the mechanical, thermal and electrical conductivity properties of polyimide matrix composites from nanofillers perspective for technological applications
  8. Rheological and thermal stability of interpenetrating polymer network hydrogel based on polyacrylamide/hydroxypropyl guar reinforced with graphene oxide for application in oil recovery
  9. Characterization of polymeric biomedical balloon: physical and mechanical properties
  10. Preparation and assembly
  11. Preparation and properties of poly (vinyl alcohol)/sodium caseinate blend films crosslinked with glutaraldehyde and glyoxal
  12. Lignin reinforced, water resistant, and biodegradable cassava starch/PBAT sandwich composite pieces
  13. A simple and green approach to the preparation of super tough IIR/SWCNTs nanocomposites with tunable and strain responsive electrical conductivity
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