Vol.10, No.2, 2022, pp.359-372, doi:10.32604/jrm.2021.016335
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ARTICLE
Assisted Compatibility, and Balanced Regulation of the Mechanical, Thermal, and Antioxidant Activity of Polyvinyl Alcohol-Chinese Bayberry Tannin Extract Films Using Different Di-Aldehydes as Cross-Linkers
  • Jingjing Liao1,2, Jinxing Li2, Fuxian Yang2, Yan Zhu2, Hongyan Wang3, Guanben Du1,2,*, Hisham Essawy4, Xiaojian Zhou2,*
1 Beijing Forestry University, Beijing, 100083, China
2 Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming, 650224, China
3 Zhejiang Academy of Forestry, Hangzhou, 310023, China
4 Department of Polymers and Pigments, National Research Centre, Cairo, 12622, Egypt

* Corresponding Authors:Xiaojian Zhou. Email: ; Guanben Du. Email:
(This article belongs to this Special Issue: Food Packaging Materials Based on Renewable Resources)
Received 26 February 2021; Accepted 07 April 2021; Issue published 30 August 2021
Abstract
Polyvinyl alcohol (PVA)-based films containing Chinese bayberry tannin (BT) were prepared by cross-linking using glyoxal, glutaraldehyde and dialdehyde starch, individually. The presence of cross-linkers was evident to promote the transparency and decrease the moisture content of PVA/BT films, while the water solubility stayed almost unchanged in the cross-linked PVA/BT films. All cross-linkers provided promotion of the water vapor permeability, mechanical property and thermal stability of PVA/BT films. The best water vapor barrier capacity was found in case of glutaraldehyde cross-linked PVA/BT film, while the highest tensile strength was encountered in case of glyoxal cross-linked PVA/BT films, compared with the uncross-linked films. The scavenging action of the films towards DPPH radical activity was influenced by the nature of each cross-linker. Namely, the PVA/AT film cross-linked by glutaraldehyde acquired the lowest radical scavenging activity in a certain time, suggesting that glutaraldehyde decreased the release rate of BT from PVA. Based on the experimental data, glutaraldehyde and dialdehyde starch could be more suitable for PVA/BT film preparation since they can promote the intermolecular interaction of PVA and BT to a reasonable extent.
Graphical Abstract
Assisted Compatibility, and Balanced Regulation of the Mechanical, Thermal, and Antioxidant Activity of Polyvinyl Alcohol-Chinese Bayberry Tannin Extract Films Using Different Di-Aldehydes as Cross-Linkers
Keywords
Polyvinyl alcohol; Chinese bayberry tannin; cross-linker; mechanical performance; antioxidant activity
Cite This Article
Liao, J., Li, J., Yang, F., Zhu, Y., Wang, H. et al. (2022). Assisted Compatibility, and Balanced Regulation of the Mechanical, Thermal, and Antioxidant Activity of Polyvinyl Alcohol-Chinese Bayberry Tannin Extract Films Using Different Di-Aldehydes as Cross-Linkers. Journal of Renewable Materials, 10(2), 359–372.
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