Effect of Varying Filler Concentration on Zinc Oxide Nanoparticle Embedded Chitosan Films as Potential Food Packaging Material

Priyadarshi, Ruchir; Negi, Yuvraj Singh

doi:10.1007/s10924-016-0890-4

Cited by 105 publications

(42 citation statements)

References 57 publications

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“…The synthesis of Ag-Cu nanoalloys and their antibacterial characteristics against E. coli have also been reported recently by Taner et al [9]. The exposure of ZnO nanoparticles and their composites to different Gram-positive and Gram-negative bacterial strains confirmed their growth reduction ability [10].…”

Section: Introductionsupporting

confidence: 57%

Poly(vinyl pyrrolidone)-mediated synthesis of silver nanowires decorated with silver nanospheres and their antimicrobial activity

Priyadarshi

Negi

2019

Bull Mater Sci

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Pathogenic infectious diseases, like bacterial infections, are one of the most prevalent types of diseases all over the world. Although antibiotics are commonly used and widely available drugs for the treatment of bacterial infections, bacteria show multiple drug resistance, have a tendency to get genetically mutated and become resistant to commonly employed antibiotic drugs. This makes the invention of novel drugs essential. One of the possible approaches is the use of nanomaterials for this purpose. The present study attempts to synthesize silver nanospheres and silver nanowires and compare their antibacterial activity. Silver nanospheres were synthesized by chemical reduction of silver nitrate in the presence of a suitable stabilizer. For the synthesis of silver nanowires, polyol method was employed. Silver nanowires neatly decorated with silver nanospheres were obtained. The antibacterial activity was estimated by separately determining the minimum inhibition concentration of the two nanostructures on Gram-positive bacteria Bacillus subtilis and Gram-negative bacteria Escherichia coli cultured on Luria Bertani agar media. The comparison shows that the antibacterial activity of silver nanospheres is better than that of silver nanowires which is attributed to its higher surface area and the difference in uptake mechanism by the bacterial cells.

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Section: Introductionsupporting

confidence: 57%

Poly(vinyl pyrrolidone)-mediated synthesis of silver nanowires decorated with silver nanospheres and their antimicrobial activity

Priyadarshi

Negi

2019

Bull Mater Sci

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“…This can be explained by increased interchain spacing when AgNP is incorporated in the films, making the passage of water molecules easier through the films. Even though there are reports where nanofiller incorporation created a tortuous path for the water molecules creating an opposite effect, the nanofillers under consideration were nonhydrophilic [43]. However, in the present case, the polyphenolic capping on the nanoparticles provided hydroxyl groups for the water molecules, thus facilitating their adsorption and desorption through the polymer matrix with ease.…”

Section: Water Vapor Permeability (Wvp) and Water Contactmentioning

confidence: 72%

Pine Needle (Pinus densiflora) Extract‐Mediated Synthesis of Silver Nanoparticles and the Preparation of Carrageenan‐Based Antimicrobial Packaging Films

Kim

Bang

Yoon

et al. 2022

Journal of Nanomaterials

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Silver nanoparticles (AgNPs) were prepared using a pine needle extract-mediated synthesis method. The X-ray diffraction (XRD) spectrum showed a characteristic peak of silver, indicating that crystalline silver nanoparticles were formed. The synthesized AgNPs were spherical and had a uniform size of 63.9 ± 2.1 nm with a narrow size distribution. The AgNPs have been used as functional nanofillers in the manufacture of carrageenan-based functional nanocomposite films. Field emission scanning electron microscopy (FE-SEM) confirmed that AgNPs were uniformly dispersed in the carrageenan polymer matrix. The addition of AgNPs to the Carr film affected the surface color, mechanical, water vapor barrier, and surface wettability properties and significantly improved the UV blocking properties of the nanocomposite films. In addition, the carrageenan/AgNP composite films showed strong antioxidant activity and potent antibacterial activity against both Gram-positive (S. aureus) and Gram-negative (E. coli O157: H7) bacteria. The carrageenan/AgNP film with UV protection, antioxidant, and antibacterial activity can be used as active food packaging material to extend the shelf life of packaged food.

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“…The TGA curves of CH.CA, CH.CA 0.25% Cu, CH.CA 0.5% Cu.a and CH.CA 0.5% Cu.b are presented in Fig. 5a The TGA pattern of pure CH shows four characteristic step degradation patterns [60]. The first one around 100 °C, is related to water evaporation.…”

Section: Tgamentioning

confidence: 99%

Development and Characterization of Antimicrobial Textiles from Chitosan-Based Compounds: Possible Biomaterials Against SARS-CoV-2 Viruses

Favatela

Otarola

Ayala-Peña

et al. 2022

J Inorg Organomet Polym

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Novel antiviral cotton fabrics impregnated with different formulations based on Chitosan (CH), citric acid (CA), and Copper (Cu) were developed. CA was selected as a CH crosslinker agent and Cu salts as enhancers of the polymer antimicrobial activity. The characterization of the polymeric-inorganic formulations was assessed by using atomic absorption spectroscopy, X-ray diffraction, Fourier transform infrared and UV-Vis spectroscopy, as well as thermogravimetric analysis. The achieved data revealed that CuO nanoparticles were formed by means of chitosan and citric acid in the reaction media. The antiviral activity of CH-based formulations against bovine alphaherpesvirus and bovine betacoronavirus was analyzed. Cotton fabrics were impregnated with the selected formulations and the antiviral properties of such textiles were examined before and after 5 to 10 washing cycles. Herpes simplex virus type 1 was selected to analyze the antiviral activities of the functionalized cotton fabrics. The resulting impregnated textiles exhibited integrated properties of good adhesion without substantially modifying their appearance and antiviral efficacy (~ 100%), which enabling to serve as a scalable biocidal layer in protective equipment's by providing contact killing against pathogens. Thus, the results revealed a viable contribution to the design of functional-active materials based on a natural polymer such as chitosan. This proposal may be considered as a potential tool to inhibit the propagation and dissemination of enveloped viruses, including SARS-CoV-2.

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Effect of Varying Filler Concentration on Zinc Oxide Nanoparticle Embedded Chitosan Films as Potential Food Packaging Material

Cited by 105 publications

References 57 publications

Poly(vinyl pyrrolidone)-mediated synthesis of silver nanowires decorated with silver nanospheres and their antimicrobial activity

Poly(vinyl pyrrolidone)-mediated synthesis of silver nanowires decorated with silver nanospheres and their antimicrobial activity

Pine Needle (Pinus densiflora) Extract‐Mediated Synthesis of Silver Nanoparticles and the Preparation of Carrageenan‐Based Antimicrobial Packaging Films

Development and Characterization of Antimicrobial Textiles from Chitosan-Based Compounds: Possible Biomaterials Against SARS-CoV-2 Viruses

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