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Cellulose nanofibrils and silver nanoparticles enhances the mechanical and antimicrobial properties of polyvinyl alcohol nanocomposite film
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Researchers developed a biodegradable polyvinyl alcohol nanocomposite film reinforced with sugarcane bagasse cellulose nanofibrils and silver nanoparticles, finding that the combination significantly improved mechanical strength and antimicrobial properties, offering a sustainable alternative to conventional plastic food packaging.
Recent findings of microplastics in marine food such as fish, crabs and shrimps necessitate the need to develop biodegradable packaging materials. This study reports on the development of a biodegradable packing material from cellulose nanofibril-polyvinyl alcohol nanocomposite embedded with silver nanoparticles. Microcrystalline cellulose was isolated from sugarcane bagasse via the kraft process followed by conversion of cellulose I to cellulose II using NaOH/urea/water solution. The nanofibrils were then isolated using (2,2,6,6-Tetramethylpiperidin-1-yl) oxyl (TEMPO) and used as a reinforcing element in polyvinyl alcohol composite prepared through solvent casting. The tensile strength, water solubility, optical properties, water vapor permeability and wettability of the prepared films were then evaluated. The antimicrobial potency of the films was evaluated using the disc diffusion antimicrobial assay against selected microorganisms.
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Citric-acid-crosslinked starch/polyvinyl alcohol composite films reinforced with sodium lignosulfonate for sustainable packaging applications
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Researchers developed starch/PVA composite films crosslinked with citric acid and reinforced with sodium lignosulfonate, finding that the aromatic lignin component simultaneously enhanced mechanical stiffness, cut water vapor transmission, blocked nearly all UV light, and raised antioxidant activity to 90% — combining multiple packaging functions in a single biodegradable film.
Nano‐fillers Embedded Green Polyvinyl Alcohol/Starch Mixed Matrix Polymeric Thin Film to Enhance the Freshness of Vegetables
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Researchers developed biodegradable food packaging films made from polyvinyl alcohol and starch — reinforced with titanium dioxide and graphitic carbon nitride nanoparticles — as a sustainable alternative to conventional petroleum-based plastic packaging. The resulting films showed improved water vapor barrier properties and were designed to slow food spoilage, with the explicit motivation of reducing the microplastic pollution caused by single-use synthetic plastics. While primarily a materials science study, it is relevant to microplastics as part of the effort to replace plastic packaging with safer alternatives.
Enhancement of polylactic acid-based electrospun films via sugarcane bagasse nanocellulose and paeonol for sustainable preservation of red grapes
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Researchers developed a biodegradable food packaging film by combining polylactic acid with sugarcane-derived nanocellulose and the natural antimicrobial compound paeonol using electrospinning. The film showed strong mechanical properties, antimicrobial activity, and extended the shelf life of red grapes by 2-3 days. The study provides a green alternative to petroleum-based plastic packaging that avoids the microplastic migration risks of conventional materials.
Nanocellulose-based packaging materials: Unlocking a sustainable path beyond microplastics
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Researchers review nanocellulose extracted from plant biomass as a sustainable packaging alternative to petroleum-based plastics, examining how its mechanical strength, tunable surface chemistry, and barrier properties can replace synthetic films and coatings while offering biodegradability and recyclability to reduce microplastic pollution from packaging waste.
Nano-reinforced bioplastics for innovative packaging applications: Functional properties, antimicrobial mechanisms, and sustainability performance
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This review paper summarizes existing research on adding tiny materials called nanomaterials, such as nanoclays and metal nanoparticles, to plant-based plastics to improve their strength, antimicrobial properties, and moisture resistance. It also reviews challenges and economic factors affecting wider commercial use of these nano-enhanced bioplastics for packaging.
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