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Start Over Search Limiters Peer Reviewed Topic anti-infective agents Topic antibacterial activity Publication Year Range Last 10 years
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1. Preparation of silver nano-particles immobilized onto chitin nano-crystals and their application to cellulose paper for imparting antimicrobial activity.

Author

Li, Zhihan, Zhang, Ming, Cheng, Dong, and Yang, Rendang

Subjects
*SILVER nanoparticles, *CHITIN, *NANOCRYSTALS, *CELLULOSE, *PAPER, *ANTI-infective agents
Abstract

Immobilized silver nano-particles (Ag NPs) possess excellent antimicrobial properties due to their unique surface characteristics. In this paper, immobilized silver nano-particles were synthesized in the presence of chitin nano-crystals (CNC) based on the Tollens mechanism (reduction of silver ion by aldehydes in the chitosan oligosaccharides (COS)) under microwave-assisted conditions. The prepared Ag NPs-loaded CNC nano-composites were then applied onto the paper surface via coating for the preparation of antibacterial paper. Fourier transform infrared (FT-IR) and X-ray diffraction (XRD) results confirmed that the Ag NPs were immobilized onto the CNC. The transmission electron microscope (TEM) and scanning electron microscopy (SEM) results further revealed that the spherical Ag NPs (5–12 nm) were well dispersed on the surface of CNC. The coated paper made from the Ag NPs-loaded CNC nano-composites exhibited a high effectiveness of the antibacterial activity against E. coli or S. aureus . [ABSTRACT FROM AUTHOR]

Published
2016
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2. Antimicrobial wrapping paper coated with a ternary blend of carbohydrates (alginate, carboxymethyl cellulose, carrageenan) and grapefruit seed extract

Author

Shiv Shankar and Jong-Whan Rhim

Subjects
Paper, Absorption of water, Polymers and Plastics, Alginates, Carbohydrates, 02 engineering and technology, Grapefruit seed extract, engineering.material, Carrageenan, Permeability, chemistry.chemical_compound, 0404 agricultural biotechnology, Anti-Infective Agents, Glucuronic Acid, Coating, Materials Chemistry, medicine, Mechanical Phenomena, Coated paper, Plant Extracts, Hexuronic Acids, Organic Chemistry, Food Packaging, Temperature, 04 agricultural and veterinary sciences, 021001 nanoscience & nanotechnology, 040401 food science, Carboxymethyl cellulose, Steam, chemistry, Chemical engineering, Carboxymethylcellulose Sodium, engineering, Biopolymer, 0210 nano-technology, Antibacterial activity, Citrus paradisi, medicine.drug
Abstract

A functional biopolymer-coated paper was prepared by coating a ternary blend of the alginate, carboxymethyl cellulose, and carrageenan with grapefruit seed extract (GSE) for the substitute use of synthetic polymer-coated paper. The microstructure of the surface and cross-section of the coated paper analyzed by field emission scanning electron microscope (FE-SEM) indicated that the biopolymer was compatible with the base paper and filled the pores of the porous fiber to make a smooth-surfaced coating paper. The properties of the biopolymer-coated paper, such as water and oil resistance, water vapor barrier, surface hydrophobicity, and mechanical properties, increased significantly compared with not only the base paper but also commercially used PE-coated paper. The blended biopolymer coating material exhibited strong antibacterial activity against food-borne pathogenic bacteria, Listeria monocytogenes and Escherichia coli, which were destroyed completely within 3 and 9 h, respectively. The packaging test for a minced fish cake packed with the biopolymer-coated paper showed the complete destruction of surface inoculated bacteria in 6–9 days. The biopolymer-coated paper showed a high potential for disposable food packaging applications to increase the shelf-life of packaged food.

Published
2018