Preparation, characterization and antimicrobial activity of polyvinyl alcohol/gum arabic/chitosan composite films incorporated with black pepper essential oil and ginger essential oil.

In this study, biocomposite films based on polyvinyl alcohol (PVA), gum arabic (GA) and chitosan (CS) incorporated with BPEO and GEO were fabricated by solvent casting method. FTIR, XRD, SEM and DSC were performed with mechanical and antimicrobial properties of PVA/GA/CS films with and without BPEO and GEO. The BPEO-PVA/GA/CS film showed heterogeneous rough surface with cavities containing entrapment of BPEO droplets, whereas, the GEO-PVA/GA/CS film showed heterogeneous rough surface with coarseness due to the incorporation of respective EOs. The BPEO and GEO incorporated PVA/GA/CS films were considerable resistant to breakage and flexible with improved heat stability. The BPEO and GEO incorporated PVA/GA/CS films were significantly inhibited the growth of Bacillus cereus, Staphylococcus aureus, Escherichia coli and Salmonella typhimurium. The obtained results have demonstrated that both BPEO and GEO incorporated PVA/GA/CS films are promising alternatives to wound dressing and food packaging materials. PMID: 32084477 [PubMed - as supplied by publisher]
Source: International Journal of Biological Macromolecules - Category: Biochemistry Authors: Tags: Int J Biol Macromol Source Type: research

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Source: RSC - Organic and Biomolecular Chemistry - Category: Molecular Biology Authors: Source Type: research
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Abstract The agro-industrial waste obtained after the isolation of bio-constituents from ginger is available in abundance. In the present study, the effective isolation of ginger nanofibers (GNF) through acid hydrolysis was carried out to get cellulose nanofibers with 100 to 200 nm width by high pressure homogenization. Bionanocomposites were also prepared by reinforcing different ratios of (1% to 7%) GNF with chitosan (CS) and polyvinyl alcohol (PVA) matrices by solvent cast method and the 5% GNF with CS and PVA resulted a high mechanical strength composites than others. The surface morphology and structural an...
Source: International Journal of Biological Macromolecules - Category: Biochemistry Authors: Tags: Int J Biol Macromol Source Type: research
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