Preparation and characterization of polyvinyl alcohol/polylactic acid/titanium dioxide nanocomposite films enhanced by γ‐irradiation and its antibacterial activity

Ali, Hussein E.; Elbarbary, Ahmed M.; Abdel‐Ghaffar, Ashraf M.; Maziad, Nabila A.

doi:10.1002/app.52344

Cited by 11 publications

(16 citation statements)

References 58 publications

(91 reference statements)

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“…Since the absorption of oxygen is significantly higher than for pure EC films, the transmission rate is expected to be lower. Since incorporating TiO 2 nanoparticles is highly beneficial for the gas and water transmission rate and, as reported recently, has impressive antibacterial properties [30][31][32], this simple process of preparing EC films with incorporated nanoparticles shows high potential in active food packaging.…”

Section: Discussionmentioning

confidence: 90%

Simple, One-Pot Method for Preparing Transparent Ethyl Cellulose Films with Good Mechanical Properties

et al. 2022

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In this research, ethyl cellulose films were prepared by a simple, easy, controlled one-pot method using either ethanol or ethyl lactate as solvents, the films being formed at 6 °C. Titanium dioxide nanoparticles were incorporated to improve the oxygen transmission and water vapour transmission rates of the obtained films. This method used no plasticizers, and flexible materials with good mechanical properties were obtained. The resulting solvent-free and transparent ethyl cellulose films exhibited good mechanical properties and unique free-shapable properties. The obtained materials had similar properties to those reported in the literature, where plasticizers were incorporated into ethyl cellulose films with an elastic modulus of 528 MPa. Contact angles showed the hydrophobic nature of all the prepared materials, with contact angles between 80 and 108°. Micrographs showed the smooth surfaces of the prepared samples and porous intersections with honeycomb-like structures. The oxygen and water vapor transmission rates were the lowest for the ethyl cellulose films prepared in ethyl lactate, these being 615 cm3·m−2·day−1 and 7.8 gm−2·day−1, respectively, showing that the films have promise for food packaging applications.

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Section: Discussionmentioning

confidence: 90%

Simple, One-Pot Method for Preparing Transparent Ethyl Cellulose Films with Good Mechanical Properties

et al. 2022

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“…Synthesis of antibacterial films for packaging applications is significant fields of research [ 36 ]. In this paper, we developed a simple and green process to prepare a very high-efficacy antimicrobial film, an acyclic N -halamine-modified PVA (PVA-MBA-Cl) film.…”

Section: Resultsmentioning

confidence: 99%

“…It is obvious that PVA-MBA film has lower water absorption and solubility than PVA film, which is due to the nucleophilic reaction between the –OH in PVA and MBA under the action of a base to reduce the hydrophilic groups in the molecules. Compared to PVA-MBA film, PVA-MBA-Cl film exhibits higher water absorption and solubility due to the destruction of the intermolecular action [ 36 ]. The tensile strengths and elongations at break of PVA, PVA-MBA, and PVA-MBA-Cl films are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The peak area of PVA-MBA-Cl film is significantly smaller, compared with that of PVA film, indicating that the part of the -OH on the PVA molecular chain reacts with the MBA, thereby reducing the amount of -OH on the PVA-MBA-Cl molecular chain [37]. The peak at 2924 cm water absorption and solubility due to the destruction of the intermolecular action [36]. The tensile strengths and elongations at break of PVA, PVA-MBA, and PVA-MBA-Cl films are shown in Fig.…”

Section: Ft-ir and Xps Spectramentioning

confidence: 99%

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High-efficacy antimicrobial acyclic N-halamine-grafted polyvinyl alcohol film

Shi

Liu

et al. 2022

Polym. Bull.

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With N,N′-methylenebisacrylamide (MBA) and polyvinyl alcohol (PVA) as raw materials, a polymer (PVA-MBA) containing N-halamine precursor functional groups was obtained via grafting reaction between the active hydroxyl groups on PVA and α, β-unsaturated functional groups of MBA under the catalysis of sodium carbonate in an aqueous solution. An acyclic N-halamine precursor-grafted PVA (MBA-PVA) film was formed by simply spreading PVA-MBA aqueous solution in a glass dish and drying it. An antimicrobial acyclic N-halamine-grafted PVA (PVA-MBA-Cl) film was achieved by spraying the diluted sodium hypochlorite solution onto the surface of PVA-MBA film. The performance test of PVA-MBA-Cl film under the optimal preparation conditions showed that the tensile performance and the hydrophobicity were improved, compared to the PVA film. The storage stability test indicated that the oxidative chlorine content Cl + (atoms/cm 2 ) of the as-prepared PVA-MBA-Cl film only reduced by 14.3% after storage for 9 weeks, showing that the antibacterial N-halamine functional groups in PVA-MBA-Cl film has excellent storage stability under room temperature. Antibacterial test showed that the PVA-MBA-Cl film had very strong antibacterial efficacies and could completely kill 1.28 × 10 6 CFU/mL S. aureus and 1.89 × 10 6 CFU/mL E. coli within 1 min. Therefore, PVA-MBA-Cl film will have more potential applications in food package.

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“…Titanium dioxide nanoparticles have been selected because of their extremely high oxidative power, structural stability, low cost, and most significantly, nontoxicity. 22 Moreover, TiO 2 is an outstanding photocatalyst that aids the degradation of several contaminants present in nature. The excess energy present in these species causes the oxidation of organic molecules that come into contact with the surface.…”

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confidence: 99%

Effect of titanium dioxide on the structural, thermal, and electrical properties of chlorinated natural rubber/poly (indole) blend nanocomposites for flexible nanoelectronic devices

Parvathi

Ramesan

2023

J of Applied Polymer Sci

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The synthesis of highly flexible conductive rubber blend nanocomposites using a conductive polymer with metal oxide is a new and promising approach. In this work, the effect of titanium dioxide (TiO 2 ) on the performance of chlorinated natural rubber/polyindole (Cl-NR/PIN) blend nanocomposites was systematically studied. Fourier-transform infrared spectra revealed the successful incorporation of nanoparticles in the blend system. UV analysis assessed the increased absorption spectra of the nanocomposite compared to the pure blend. The X-ray diffraction confirms the presence of TiO 2 nanostructure in the blend. The high resolution transmission electron microscope results exhibited the uniform dispersion of TiO 2 in the blend. Differential scanning calorimetry and thermogravimetric analysis show the increased glass transition temperature and thermal stability of the blend nanocomposite with an increase in TiO 2 concentration. The linear low-frequency AC conductivity demonstrated the occurrence of electrode polarization and the exponential increase in AC conductivity after a threshold frequency illustrated the semiconducting behavior of the composites. The maximum dielectric constant and AC conductivity were measured for the composite with 5 wt% filler loading, as the threshold level for the maximum interfacial contact. The hopping conduction, activation energy, improved conductivity and dielectric properties suggest that these blend nanocomposite films are promising candidates for the development of flexible energy storage devices.chlorinated natural rubber/polyindole blend, dielectric parameters, nanocomposites, temperature dependent conductivity, thermal properties, titanium dioxide | INTRODUCTIONConducting polymers are of great interest due to their diverse applications such as rechargeable batteries, modified electrodes, biosensors, electrochromic displays, and primer layers that prevent corrosion. [1][2][3] The nitrogencontaining heteroaromatic polymer has several intriguing properties, but the main barrier is its poor mechanical stability, brittleness and low processability. Polyindole (PIN) films are often particularly rigid, brittle, insoluble,

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Preparation and characterization of polyvinyl alcohol/polylactic acid/titanium dioxide nanocomposite films enhanced by γ‐irradiation and its antibacterial activity

Cited by 11 publications

References 58 publications

Simple, One-Pot Method for Preparing Transparent Ethyl Cellulose Films with Good Mechanical Properties

Simple, One-Pot Method for Preparing Transparent Ethyl Cellulose Films with Good Mechanical Properties

High-efficacy antimicrobial acyclic N-halamine-grafted polyvinyl alcohol film

Effect of titanium dioxide on the structural, thermal, and electrical properties of chlorinated natural rubber/poly (indole) blend nanocomposites for flexible nanoelectronic devices

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