| Title: | Novel composite films from regenerated cellulose-glycerol-polyvinyl alcohol: Mechanical and barrier properties |
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| Authors: | ID Cazón, Patricia (Author)
ID Velazquez, Gonzalo (Author)
ID Vazquez, Manuel (Author) |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | Cellulose is considered as an alternative for the demand of biocompatible and environmentally friendly food packaging. The aim of this study was to evaluate a composite film from regenerated cellulose combined with polyvinyl alcohol. Glycerol was used as a plasticizer. Mathematical models were used to describe the effect of the film structure on the mechanical (tensile strength, percentage of elongation at break) and barrier properties (water vapour permeability, light-barrier properties and transparency). The morphology, structural and thermal properties were evaluated by spectral analysis (FT-IR and UV-VIS-NIR), scanning electron microscopy and dif- ferential scanning calorimetry. Models predict cellulose-glycerol-polyvinyl alcohol films with tensile strength values from 25.9 to 369 MPa, similar to that of synthetic polymer films. The elongation at break of the developed films (0.89–18.7%) was lower than that of synthetic polymer films. The water vapour permeability obtained (2.32·10−11 - 3.01·10−11 g/s·m·Pa) was higher than that of petrochemical-based plastics. Cellulose films re- inforced with polyvinyl alcohol showed a smooth surface. Results showed that it is viable to accomplish com- posite films from cellulose-polyvinyl alcohol-glycerol with enhanced mechanical properties. The obtained films showed top values of transparency. The addition of glycerol resulted in films with a UV protective effect which could be important in food packaging to prevent lipid oxidative deterioration. |
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| Keywords: | Regenerated cellulose, Tensile strength, Water vapor permeability, Anti-plasticizer, DSC, UV protection |
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| Year of publishing: | 2019 |
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| Number of pages: | 481-491 |
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| Numbering: | 1, 89 |
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| PID: | 20.500.12556/RUNG-6027 |
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| COBISS.SI-ID: | 42613507 |
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| DOI: | 10.1016/J.FOODHYD.2018.11.012 |
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| NUK URN: | URN:SI:UNG:REP:LZQXZRE5 |
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| Publication date in RUNG: | 14.12.2020 |
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| Views: | 3628 |
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| Downloads: | 0 |
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