Chitosan/nano ZnO composite films: Enhanced mechanical, antimicrobial and dielectric properties

Rahman, P. Mujeeb; Mujeeb, V.M. Abdul; Muraleedharan, K.; Thomas, Steni K.

doi:10.1016/j.arabjc.2016.09.008

Cited by 174 publications

(54 citation statements)

References 36 publications

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“…In addition, a fungicidal effect was noticed in the case of AgZnHApCs suspensions after 48 h and 72 h of exposure, and in the case of AgZnHApCs coatings after 72 h of incubation. The results revealed by the antimicrobial assays are in agreement with previously 8, [44][45][46][47][48][49][50][51][52][53]. Moreover, the results are in accordance with literature data reported on the potential antimicrobial properties of materials and composite layers based on hydroxyapatite enhanced with metal ions in polymeric matrix which possess antimicrobial activity.…”

Section: Resultssupporting

confidence: 92%

Fabrication of Silver- and Zinc-Doped Hydroxyapatite Coatings for Enhancing Antimicrobial Effect

2020

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This study develops, for the first time, composite coatings based on silver and zinc doped hydroxyapatite in chitosan matrix (AgZnHApCs). The AgZnHApCs composite coatings were prepared by dip coating method. The hydroxyapatite (HAp), biocompatible material for regenerating and strengthening damaged bones were doped with silver and zinc ions and coated with chitosan in order to produce a uniform and homogenous coating with biocompatibility and antimicrobial properties. The stability of AgZnHApCs suspensions was evaluated by ultrasound measurements. The value of stability parameters of AgZnHApCs suspension is in good agreement with the value of bidistilled water used as reference fluid. Homogeneously dispersed solutions of AgZnHApCs were synthesized to endeavor to optimize the physico-chemical and biological characteristics of the coatings obtained at room temperature. The AgZnHApCs composite suspension and coatings were analyzed using various investigation techniques, such as X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenylte-2H-tetrazolium bromide) assay and antimicrobial studies. The optical spectroscopy, atomic force microscopy (AFM), metallographic examination and X-ray photoelectron spectroscopy (XPS) on AgZnHApCs composite coatings were also conducted. Cell culture and MTT assays demonstrate that AgZnHApCs composite suspension and coatings have no negative effect on the cell viability and proliferation. The cell morphology was not affected in presence of AgZnHApCs composite suspension and coatings. The antimicrobial assays conducted against Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, and Candida albicans ATCC 90029 microbial strains revealed that both the AgZnHApCs composite suspension and coatings exhibited great antimicrobial properties.

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Section: Resultssupporting

confidence: 92%

Fabrication of Silver- and Zinc-Doped Hydroxyapatite Coatings for Enhancing Antimicrobial Effect

2020

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“…Some cracks can be seen on the surface of control films ( Figure 4A). The presence of the ZnO NPs on the surface of nanocomposite films are clearly visible and are evenly distributed ( Figure 4B-D); similar to what was reported in previous studies [14,34]. The films prepared with higher ZnO concentrations (2% and 4%) showed some agglomeration of nanoparticles in the composite films.…”

Section: Surface Morphologysupporting

confidence: 89%

Biodegradable Hybrid Nanocomposite of Chitosan/Gelatin and Green Synthesized Zinc Oxide Nanoparticles for Food Packaging

Kumar

Mudai

Roy

et al. 2020

Foods

129

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In the context of emerging global concerns with synthetic plastic packaging, alternative natural biodegradable packaging materials are gaining increasing attention for food packaging applications. In this study, chitosan and gelatin nanocomposite hybrid films containing green synthesized zinc oxide (ZnO) nanoparticles (NPs) were developed and microstructural properties were studied. Antimicrobial activity of the developed films was evaluated using both Gram negative (Escherichia coli) and Gram positive bacteria (Staphylococcus aureus). Green synthesis protocol was used for the precipitation of ZnO NPs using fruit extract of Cassia fistula. The as-synthesized polyhedral ZnO NPs were in the range of 20–40 nm (average size ≈29 nm). Reinforcement with ZnO NPs in the hybrid films lead to improved thermal stability, elongation-at-break (EAB), and compactness properties. The developed films with 2% and 4% ZnO NPs showed a smooth, compact, and heterogeneous surface morphology compared to the control (chitosan-gelatin hybrid) films. Disc diffusion assays showed that the nanocomposite film had significant antimicrobial activity against E. coli. The developed hybrid nanocomposite films have potential to be developed as biodegradable alternative for postharvest packaging of fresh fruits and vegetables.

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“…According to related studies, the size, shape, and hydrophily of modified nanoparticles could be adjusted to improve the properties of films [8]. Several nanoparticles, such as nano-ZnO, nano-TiO 2 , nano-SiO 2 , and nano-clay, have been evaluated as potential nanomaterial [6,9,10,11,12]. Among these nanomaterials, nano-SiO 2 exhibits the greatest potential because of its superior properties, including an extremely porous structure and high surface activity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Potato Starch Film with Various Size of Nano-SiO2

2018

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The various sizes (15, 30, 80, and 100 nm) of nano-SiO2/potato starch films were synthesized and characterized. The gas permeability, antibacterial properties, and mechanical properties of the films were evaluated to their potential for application as food packaging materials. Results indicated that the 100 nm nano-SiO2 was well dispersed in the starch matrix, which induced an active group on the surface of 100 nm nano-SiO2 adequately combined with starch macromolecule. The water resistance and mechanical properties of the films were improved with the addition of nano-SiO2. Notably, resistance to ultraviolet and thermal aging was also enhanced. The nano-SiO2/potato starch films were more efficient against Escherichia coli (E. coli) than Staphylococcus aureus (S. aureus). Remarkable preservation properties of the films packaging the white mushrooms were obtained, with those of the 100 nm films considered superior. This study can significantly guide the rational choice of the nano-SiO2 size to meet the packaging requirements of various agricultural products.

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Chitosan/nano ZnO composite films: Enhanced mechanical, antimicrobial and dielectric properties

Cited by 174 publications

References 36 publications

Fabrication of Silver- and Zinc-Doped Hydroxyapatite Coatings for Enhancing Antimicrobial Effect

Fabrication of Silver- and Zinc-Doped Hydroxyapatite Coatings for Enhancing Antimicrobial Effect

Biodegradable Hybrid Nanocomposite of Chitosan/Gelatin and Green Synthesized Zinc Oxide Nanoparticles for Food Packaging

Preparation and Characterization of Potato Starch Film with Various Size of Nano-SiO2

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