Modelling of sorbic acid diffusion through bacterial cellulose-based antimicrobial films
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Loredana-Mihaela Dobre
,
Anicuţa Stoica-Guzun
Abstract
Antimicrobial packaging protects the product from the external environment and microbial contamination, conferring numerous advantages on human health. Interest in biopolymers as packaging materials has considerably increased recently. Bacterial cellulose is an interesting biomaterial produced as nanofibrils by Acetobacter xylinium and is a promising candidate due to its remarkable properties. New composite materials with antimicrobial properties were developed in this work, containing poly(vinyl alcohol) (PVA) as polymer matrix and ground bacterial cellulose (BC) as reinforcing fibres. Sorbic acid was used as an antimicrobial agent because it is a preservative recognised in the food industry. The materials obtained were studied using Fourier-transformed infrared spectroscopy (FTIR). The swelling rate of the composites was also measured. Release experiments of sorbic acid from the composite films into water were performed and the mass transfer phenomena were investigated using Fick’s law of diffusion. The antimicrobial effect was tested against Escherichia coli K12-MG1655. The results obtained indicated that the new biocomposite films could be promising antimicrobial food packaging materials.
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© 2011 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Bioactive papaverine derivatives bind G-quadruplexes selectively
- Ethanol production in a bioreactor with an integrated membrane distillation module
- Wettability of polypropylene capillary membranes during the membrane distillation process
- A reburning process using sewage sludge-derived syngas
- Chemical engineering approach to regenerative medicine
- Photosensitised oxidation of a water pollutant using sulphonated porphyrin
- Influence of selected biowaste materials pre-treatment on their anaerobic digestion
- Potassium sorbate release from poly(vinyl alcohol)-bacterial cellulose films
- Modelling of sorbic acid diffusion through bacterial cellulose-based antimicrobial films
- The use of stable isotopes ratios for authentication of fruit juices
- Reduction of ostazine dyes’ photodynamic effect by Fenton reaction
