Development of ultrasound treated polyvinyl alcohol/tea polyphenol composite films and their physicochemical properties - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Ultrasonics Sonochemistry Year : 2019

Development of ultrasound treated polyvinyl alcohol/tea polyphenol composite films and their physicochemical properties

Abstract

In this study, polyvinyl alcohol (PVA) was used as a film-forming substrate, added to extracted tea polyphenols (TPs) in various ratios and processed with ultrasonication to form films using the tape-casting method. The effects of ultrasonic processing duration on the properties of PVA/TP antibacterial active materials were explored via material property testing. The results showed that, overall, ultrasonic processing degraded the tensile strength and elongation at break of the composite films. When PVA/TP composite films with a PVA-to-TP mass ratio of 8:2 were processed with ultrasonication for 30 min, the swelling capacity was (740.19 +/- 64.67)% and solubility was (5.26 +/- 1.31)%. Ultrasonication also improved the degradability and barrier properties of composite films. Moreover, 8/2 composite films with the PVA/TP ratio of 8:2 exhibited excellent bacteriostatic properties; after ultrasonication processing, the films had a bacteriostatic rate of (95.5 +/- 4.2)% and (91.8 +/- 3.7)% against Staphylococcus aureus and Escherichia coli, respectively, making them suitable for use as antibacterial active materials in food packaging.

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Dates and versions

hal-02625624 , version 1 (26-05-2020)

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Yaowen Liu, Shuyao Wang, Weijie Lan, Wen Qin. Development of ultrasound treated polyvinyl alcohol/tea polyphenol composite films and their physicochemical properties. Ultrasonics Sonochemistry, 2019, 51, pp.386 - 394. ⟨10.1016/j.ultsonch.2018.07.043⟩. ⟨hal-02625624⟩
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