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Title:Composite films with UV-barrier properties of bacterial cellulose with glycerol and polyvinyl alcohol: puncture properties, solubility and swelling degree
Authors:ID Cazón, Patricia (Author)
ID Vazquez, Manuel (Author)
ID Velazquez, Gonzalo (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The aim of this study was to develop composite films based on bacterial cellulose, glycerol, and poly(vinyl alcohol) with improved optical and mechanical properties and good UV-barrier property. The interaction among the compounds was analyzed using Fourier transform infrared spectroscopy, scanning electron microscopy, ther- mogravimetry, and differential scanning calorimetry. The mechanical properties (toughness, burst strength, and distance to burst), solubility, water adsorption, and light barrier properties of the composite films were evaluated. Polynomial models obtained allowed us to predict the behavior of these properties. Poly(vinyl alcohol) showed a reinforcing effect on the bacterial cellulose matrix, while glycerol showed a noticeable plasticizing behavior. The bacterial cellulose-based composites showed toughness values ranging from 0.22 to 2.60 MJ/m3. The burst strength values obtained ranged between 43.74 and 2105.52 g. The distance to burst ranged from 0.39 to 4.94 mm. The film solubility on water ranged from 9.37 to 31.65%, and the water retention ranged from 78.26 to 364.78%. Glycerol decreased the transmittance in the UV region, improving the UV- barrier properties of the films, while poly(vinyl alcohol) improved the transparency and opacity values of the samples. The transmittance in the UV regions (A, B, and C) ranged from 1 to 48.51%, increasing with the poly(vinyl alcohol) concentration.
Keywords:DSC, FT-IR, SEM, UV protection
Year of publishing:2019
Number of pages:3115-3125
Numbering:8, 20
PID:20.500.12556/RUNG-6025 New window
COBISS.SI-ID:42578179 New window
DOI:10.1021/acs.biomac.9b00704 New window
NUK URN:URN:SI:UNG:REP:UWCPU8AN
Publication date in RUNG:14.12.2020
Views:3426
Downloads:0
Metadata:XML DC-XML DC-RDF
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CAZÓN, Patricia, VAZQUEZ, Manuel and VELAZQUEZ, Gonzalo, 2019, Composite films with UV-barrier properties of bacterial cellulose with glycerol and polyvinyl alcohol: puncture properties, solubility and swelling degree. Biomacromolecules [online]. 2019. Vol. 8, no. 20, p. 3115–3125. [Accessed 21 April 2025]. DOI 10.1021/acs.biomac.9b00704. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=6025
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Record is a part of a journal

Title:Biomacromolecules
Year of publishing:2019

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License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:14.12.2020

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