Antimicrobial film from PLA/NR-grafted-modified chitosan-chelated-silver ions blend

2021 ◽  
pp. 105073
Author(s):  
Panisa Sangnak ◽  
Petrung Seananud ◽  
Philippe Daniel ◽  
Polphat Ruamcharoen ◽  
Chor. Wayakron Phetphaisit
Keyword(s):  
Silver Ions ◽  
Modified Chitosan ◽  
Antimicrobial Film

Preparation of low-density polyethylene–silver ion antimicrobial film with and without ethylene-vinyl acetate

2019 ◽  
Vol 28 (8-9) ◽  
pp. 554-561
Author(s):  
RSN Sahai ◽  
VR Gaval ◽  
B Bhat
Keyword(s):  
Antimicrobial Agent ◽  
Vinyl Acetate ◽  
Antimicrobial Agents ◽  
Silver Ions ◽  
Ethylene Vinyl Acetate ◽  
Silver Ion ◽  
Low Density Polyethylene ◽  
Low Density ◽  
First Case ◽  
Antimicrobial Film

The incorporation of antimicrobial agents into packaging materials is an effective method to inhibit the microbial population and aimed at specific microorganisms to provide better and safe products. The present study aims at developing an effective antimicrobial film with silver ions as an antimicrobial agent with and without ethylene-vinyl acetate (EVA). In the present work, two different masterbatches (MBs) were prepared. In the first case MB of 90%, linear low-density polyethylene (LLDPE) and 10% silver ions as an antimicrobial agent were prepared. In the second case MB of 80%, LLDPE, 10% silver ion, and 10% EVA were prepared. An antimicrobial film with low-density polyethylene and different percentages of the MB (0–30%) was prepared and tested under Japanese Industrial Standard (JIS Z 2801:2000) for Escherichia coli bacteria and Staphylococcus aureus bacteria. With the increase in the percentage loading of MB, the living amount of bacteria decreases. The decrease in the living amount of bacteria was greater when EVA was incorporated.

scholarly journals Surface Modified Chitosan with Cadmium Sulfide Quantum Dots as Luminescent Probe for Detection of Silver Ions

2021 ◽  
Vol 33 (5) ◽  
pp. 1025-1030
Author(s):  
Chella Santhosh ◽  
R.S. Ernest Ravindran
Keyword(s):  
Quantum Dots ◽  
Cadmium Sulfide ◽  
Silver Ions ◽  
Aqueous Solubility ◽  
X Ray Diffraction ◽  
Modified Chitosan ◽  
Transmission Electron ◽  
Cds Qds ◽  
Surface Modified ◽  
Chitosan Composite

In present work, the surface modified cadmium sulfide quantum dots (CdS QDs) was synthesized with chitosan for the detection of silver ions. Chitosan was employed as matrix medium to fabricate CdS QDs, resulting in the formation of novel QDs/chitosan composite. The CdS quantum dots surface coated with chitosan were analyzed using UV-vis spectrophotometer, X-ray diffraction and transmission electron microscope. The chitosan + CdS QDs exhibited high aqueous solubility with better steadiness. By using chitosan + CdS, the silver ions were not only detected but also reduced to nanosize due to the reducing property of chitosan. The mechanism of fluorescence quenching of chitosan + CdS by Ag+ was investigated using photoluminescence spectroscopy.

scholarly journals Chitosan-S-triazinyl-bis(2-aminomethylpyridine) and Chitosan-S-triazinyl-bis(8-oxyquinoline) Derivatives: New Reagents for Silver Nanoparticle Preparation and Their Effect of Antimicrobial Evaluation

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Hessa H. Al-Rasheed ◽  
Kholood A. Dahlous ◽  
Essam N. Sholkamy ◽  
Sameh M. Osman ◽  
Omar H. Abd-Elkader ◽  
...  
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Silver Ions ◽  
Antimicrobial Activities ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modified Chitosan ◽  
Gram Positive Bacteria ◽  
Transmission Electron ◽  
Nanoparticle Preparation

Herein, we described the modification of chitosan with cyanuric chloride as a mediator for preparation of chitosan-s-triazinyl-bis(2-aminomethylpyridine) and chitosan-s-triazinyl-bis(8-oxyquinoline) derivatives to be used as reagents for preparation of silver nanoparticles under ecofriendly conditions. These two reagents are convenient and effective for reduction of silver ions to silver nanoparticles with particle size less than 10 nm that might be suitable for industrial and medicinal applications. The formation and particle size of AgNPs are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray analysis (EDX). The antimicrobial activity of the two modified chitosan-s-triazine-AgNPs was evaluated against activities against Gram-positive bacteria (M. luteus ATCC 10240 and MRSA ATCC 43300), Gram-negative bacteria (E. coli ATCC 25922 and P. aeruginosa ATCC 75853), and C. albicans. The results showed that chitosan-s-triazinyl-bis(2-aminomethylpyridine) AgNPs showed high antimicrobial activities against all the tested microorganisms, while their analogous chitosan-s-triazinyl-bis(8-oxyquinoline) AgNPs showed moderate activities.

The Preparation of a Novel Environmentally Friendly Green Antimicrobial Packaging Film

2012 ◽  
Vol 151 ◽  
pp. 665-667 ◽  
Author(s):  
Jiu Fang Duan ◽  
Heng Zhao ◽  
Xiao Jian Zhang ◽  
Zi Yu Li ◽  
Ling Ling Shi ◽  
...  
Keyword(s):  
Antimicrobial Agent ◽  
Antibacterial Agent ◽  
Food Packaging ◽  
Antibacterial Properties ◽  
Silver Ions ◽  
Packaging Film ◽  
Antimicrobial Packaging ◽  
Antimicrobial Film ◽  
New Type ◽  
Film Preparation

Antimicrobial packaging is a hot research in food packaging research. A new type of antibacterial packaging film preparation was introduced in this paper. The new composite membrane was successfully prepared by using poly (succinic acid - adipic acid - butanediol) ester (PBSA) film as the base film through surface grafted approach, and nano-silver ions were used as antimicrobial agent in the antimicrobial film. The results showed that the new PBSA film has a good antibacterial antibacterial properties, and the best antibacterial agent formulations have been identified.

Complex formation of modified chitosan and carboxymethyl cellulose and its effect on paper properties

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 29-35 ◽  
Author(s):  
PEDRAM FATEHI ◽  
LIYING QIAN ◽  
RATTANA KITITERAKUN ◽  
THIRASAK RIRKSOMBOON ◽  
HUINING XIAO
Keyword(s):  
Carboxymethyl Cellulose ◽  
Polymer System ◽  
Layer By Layer ◽  
Paper Strength ◽  
Anionic Polymer ◽  
Paper Properties ◽  
Modified Chitosan ◽  
Layer By Layer Assembly ◽  
Polyelectrolyte Titration ◽  
Layer Assembly

The application of an oppositely charged dual polymer system is a promising approach to enhance paper strength. In this work, modified chitosan (MCN), a cationic polymer, and carboxymethyl cellulose (CMC), an anionic polymer, were used sequentially to improve paper strength. The adsorption of MCN on cellulose fibers was analyzed via polyelectrolyte titration. The formation of MCN/CMC complex in water and the deposition of this complex on silicon wafers were investigated by means of atomic force microscope and quasi-elastic light scattering techniques. The results showed that paper strength was enhanced slightly with a layer-by-layer assembly of the polymers. However, if the washing stage, which was required for layer-by-layer assembly, was eliminated, the MCN/CMC complex was deposited on fibers more efficiently, and the paper strength was improved more significantly. The significant improvement was attributed to the extra development of fiber bonding, confirmed further by scanning electron microscope observation of the bonding area of fibers treated with or without washing. However, the brightness of papers was somewhat decreased by the deposition of the complex on fibers. Higher paper strength also was achieved using rapid drying rather than air drying.

Biocompatibility of Silver Nano Bio-conjugates from Vitis vinifera Seeds and its Major Component Resveratrol

2016 ◽  
Vol 6 (3) ◽  
Author(s):  
R. Preethi ◽  
P. Padma
Keyword(s):  
Zeta Potential ◽  
Vitis Vinifera ◽  
Silver Ions ◽  
Seed Extract ◽  
Polydispersity Index ◽  
Potential Range ◽  
Visible Spectroscopy ◽  
Grape Seeds ◽  
X Ray ◽  
Uv Visible

The study focused on the green synthesis of silver nanobioconjugates (AgNPs) from phenolic-rich fruit source, Vitis vinifera seed extract and its major component phenolic, resveratrol respectively. Sunlight exposure for 20 minutes was the method of choice for the synthesis of AgNPs of the extract as well as the phenolic, resveratrol. The synthesized nanobioconjugates were characterized using UV-Visible spectroscopy, Transmission electron microscopy (TEM), Energy dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), Polydispersity index, Zeta potential and Fourier transform infrared spectroscopy (FTIR). The reduction of silver ions was confirmed by UV-visible spectroscopy with peaks at 440nm for both nanobioconjugates synthesized from seed extract and compound. The nanobioconjugates showed the spherical in shape with 14-35nm in size and crystalline in nature. The conjugates are well dispersed with 0.301 and 0.287 polydispersity index and the zeta potential range at -13.6 and -14.3mV for stability. The FTRI data proved that the components in grape seeds act as good reductants and stabilizers for the silver nanobioconjugate synthesis. All the synthesized nanobioconjugates exhibited steady and sustained release of the medicinal components conjugated, proving their druggability, and were biocompatible with human cells, demonstrating their safety. The findings of the study validate the anticancer properties of silver nanobioconjugates of Vitis vinifera and its active component resveratrol.

Progress on Modified Chitosan Applied in Drug Delivery System

2010 ◽  
Vol 7 (6) ◽  
pp. 458-464
Author(s):  
Xiao-Li WU ◽  
Can ZHANG ◽  
Qi-Neng PING
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Delivery System ◽  
Modified Chitosan

Antimicrobial Activity of Silver Nanoparticles Synthesized by Streptomyces Species JF714876

2012 ◽  
Vol 5 (1) ◽  
pp. 1638-1642 ◽  
Author(s):  
Vidyasagar G M ◽  
Shankaravva B ◽  
R Begum ◽  
Imrose ◽  
Sagar R ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Silver Ions ◽  
Human Beings ◽  
Streptomyces Species ◽  
Force Microscopy ◽  
E Coli ◽  
Extracellular Synthesis ◽  
Atomic Force ◽  
Uv Visible

Microorganisms like fungi, actinomycetes and bacteria are considered nanofactories and are helpful in the production of nanoparticles useful in the welfare of human beings. In the present study, we investigated the production of silver nanoparticles from Streptomyces species JF714876. Extracellular synthesis of silver nanoparticles by Streptomyces species was carried out using two different media. Silver nanoparticles were examined using UV-visible, IR and atomic force microscopy. The size of silver nanoparticles was in the range of 80-100 nm. Antimicrobial activity of silver nanoparticle against bacteria such as E. coli, S. aureus, and dermatophytes like T. rubrum and T. tonsurans was determined. Thus, this study suggests that the Streptomyces sp. JF741876 can produce silver ions that can be used as an antimicrobial substance.

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