Gallic acid functionalized chitosan immobilized nanosilver for modified chitosan/Poly (vinyl alcohol) composite film

Zhao, Yanzhen; Liu, Yang; Xu, Meirong; Wang, Hong; Gao, Xianghua; Niu, Baolong; Li, Wenfeng

doi:10.1016/j.ijbiomac.2022.10.074

Cited by 37 publications

(11 citation statements)

References 49 publications

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“…A gelatin/carboxymethyl chitosan matrix has been created and cured with silver nanoparticles. This matrix possesses exceptional physical properties as well as significant antibacterial properties [ 21 ]. Oxygen plasma has been used to load chitosan/polyenyl alcohol gels after modifying poly L-lactic acid with silver nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Loaded on Chitosan-g-PVA Hydrogel for the Wound-Healing Applications

et al. 2023

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Silver nanoparticle composites have abundant biomedical applications due to their unique antibacterial properties. In the current work, green tea leaf extract was used as a natural reducing agent to synthesize AgNPs (AgNPs) using microwave irradiation technology. Furthermore, microwave irradiation has been used for the preparation of AgNPs/chitosan (Ch) grafted polyvinyl alcohol (PVA) hydrogel samples. To approve the accomplishment of AgNPs hydrogel polymer, UV-spectrum, TEM, and FT-IR spectrum analyses and the release of silver ions, actions were taken. The wound-healing ability of the prepared hydrogel samples was measured via both the in vitro (fibroblast cells) and the in vivo using rat models. It was found that chitosan-grafted polyvinyl alcohol, including AgNPs, exhibited excellent antibacterial activity against E. coli and S. aureus using the agar diffusion method. It can be said that microwave irradiation was successful in creating a hydrogel that contained silver nanoparticles. A wound that was still open was successfully treated with these composites.

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Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Loaded on Chitosan-g-PVA Hydrogel for the Wound-Healing Applications

et al. 2023

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“…Then, the TSS of the packaged samples tended to slowly decrease until the end of storage, and the PVA/MG/DS group had the lowest TSS of 7.98% after 12 days of storage. This result can be explained by the fact that the high hydrophobicity of the MG coating and the good oxygen barrier properties of the DS filling retard the hydrolysis of individual sugars and tissue respiration in stored mangoes . In addition, it can be observed from Figure c that all the packaging samples showed a clear decreasing trend.…”

Section: Resultsmentioning

confidence: 85%

“…This result can be explained by the fact that the high hydrophobicity of the MG coating and the good oxygen barrier properties of the DS filling retard the hydrolysis of individual sugars and tissue respiration in stored mangoes. 50 In addition, it can be observed from Figure 11c that all the packaging samples showed a clear decreasing trend. Obviously, the TA value of the PVA/MGDS film group (0.88%) was statistically higher than that of the pure PVA group (0.42%), attributing to the higher CO 2 concentration accumulated internally in the mangoes and increasing the titratable acidity.…”

Section: ■ Results and Discussionmentioning

confidence: 88%

Improvement of Hydrophobicity and Gas Permeability of the Polyvinyl Alcohol Film Utilizing Monoglyceride Coating and Diatomaceous Earth Filling and Its Application to Fresh-Cut Mango

Liu

et al. 2023

ACS Sustainable Chem. Eng.

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The widespread utilization of the polyvinyl alcohol (PVA) film is significantly hindered by two prominent limitations: water sensitivity and low gas permeability. In this work, a novel PVA film coated with monoglyceride (MG) and filled with diatomaceous earth (DS) was fabricated to address these issues. Scanning electron microscopy and 3D morphology revealed that the R a value improved from 3.72 to 7.21 μm. Also, the successful coating of MG was confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Pull-off adhesion tests proved that the film containing 0.5 g of MG exhibited the highest adhesive properties. The PVA/MG/DS film had the highest contact angle of 122.32°, the lowest water vapor permeability of 7.19 g/m2/day, and the lowest oxygen permeability of 55.35 (cm3 × cm × cm2 × s × Pa)−1. Moreover, this type of film exhibited higher light transmittance, better thermal stability, and greater mechanical properties than pure PVA film. Consequently, the PVA/MG/DS film displayed superior performance in preserving the freshness and quality of fresh-cut mango, with a lowest weight loss of 4.48%, a lowest total soluble solids of 7.98%, a greatest titratable acidity of 0.88%, a highest ascorbic acid of 76.67 mg/100 g, and best sensory quality.

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“…For pure COS, the characteristic peak that appeared at 3410 cm −1 was attributed to the stretching vibrations of NH and OH, the typical peak appeared at 2870 cm −1 was assigned to the stretching vibration of methylene, the new peak at 1600 cm −1 was due to the vibration modes of N-H and the characteristic peak located at 1070 cm −1 was assigned to the stretching vibration of the glucosamine ring (C-O) [ 22 ]. After nicotinylation, in the COS-N spectrum, the new peaks at 1730 cm −1 , 1650 cm −1 and 1284 cm −1 were attributed to the stretching vibration of the ester bond (C=O), the stretching vibration of the amide bond (C=O) and the stretching vibrations of the ester bond (C–O), respectively [ 23 ]. A set of peaks at 628–740 cm −1 were attributed to the vibrational absorption peak of pyridine (C=C) [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

Cationic Chitooligosaccharide Derivatives Bearing Pyridinium and Trialkyl Ammonium: Preparation, Characterization and Antimicrobial Activities

et al. 2022

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In this study, chitooligosaccharide-niacin acid conjugate was designed and synthesized through the reaction of chitooligosaccharide and nicotinic acid with the aid of N,N′-carbonyldiimidazole. Its cationic derivatives were prepared by the further nucleophilic substitution reaction between the chitooligosaccharide-niacin acid conjugate and bromopropyl trialkyl ammonium bromide with different alkyl chain lengths. The specific structural characterization of all derivatives was identified using Fourier Transform Infrared Spectroscopy (FTIR) and Nuclear Magnetic Resonance (NMR), and the degree of substitution was obtained using the integral area ratio of the hydrogen signals. Specifically, the antibacterial activities against Escherichia coli, Staphylococcus aureus, Pseudoalteromonas citrea and Vibrio harveyi were evaluated using broth dilution methods. In addition, their antifungal activities, including Botrytis cinerea, Glomerella cingulate and Fusarium oxysporum f. sp. cubense were assayed in vitro using the mycelium growth rate method. Experimental data proved that the samples showed antibacterial activity against four pathogenic bacteria (MIC = 1–0.125 mg/mL, MBC = 8–0.5 mg/mL) and enhanced antifungal activity (50.30–68.48% at 1.0 mg/mL) against Botrytis cinerea. In particular, of all chitooligosaccharide derivatives, the chitooligosaccharide derivative containing pyridinium and tri-n-butylamine showed the strongest antibacterial capacity against all of the test pathogenic bacteria; the MIC against Vibrio harveyi was 0.125 mg/mL and the MBC was 1 mg/mL. The experimental results above showed that the introduction of pyridinium salt and quaternary ammonium salt bearing trialkyl enhanced the antimicrobial activity. In addition, the cytotoxicity against L929 cells of the chitooligosaccharide derivatives was evaluated, and the compounds exhibited slight cytotoxicity. Specifically, the cell viability was greater than 91.80% at all test concentrations. The results suggested that the cationic chitooligosaccharide derivatives bearing pyridinium and trialkyl ammonium possessed better antimicrobial activity than pure chitooligosaccharide, indicating their potential as antimicrobial agents in food, medicine, cosmetics and other fields.

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Gallic acid functionalized chitosan immobilized nanosilver for modified chitosan/Poly (vinyl alcohol) composite film

Cited by 37 publications

References 49 publications

Silver Nanoparticles Loaded on Chitosan-g-PVA Hydrogel for the Wound-Healing Applications

Silver Nanoparticles Loaded on Chitosan-g-PVA Hydrogel for the Wound-Healing Applications

Improvement of Hydrophobicity and Gas Permeability of the Polyvinyl Alcohol Film Utilizing Monoglyceride Coating and Diatomaceous Earth Filling and Its Application to Fresh-Cut Mango

Cationic Chitooligosaccharide Derivatives Bearing Pyridinium and Trialkyl Ammonium: Preparation, Characterization and Antimicrobial Activities

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