Structure and morphology of nanocomposite films prepared from polyvinyl alcohol and silver nitrate: Influence of thermal treatment

In this research, titanium dioxide (TiO2) nanoparticles were immobilized into polyvinyl alcohol (PVA) matrix without and with surfactants via solution casting film combined with thermal treatment method. The dispersion and distribution of TiO2 nanoparticles presented by scanning electron microscopy (SEM) showed the uniform distribution of TiO2 nanoparticles in PVA matrix with surfactant. Fourier-transform infrared spectroscopy (FTIR) showed increasing intensity peak at 560-800 cm-1 corresponding to Ti-O stretching vibration indicating interaction between PVA and TiO2 after thermal treatment. X-ray diffraction (XRD) result showed peak of PVA crystal structure due to the thermal treatment, and the addition of surfactant could decrease the average crystallite size of TiO2 in PVA/TiO2 nanocomposite films. Photocatalytic activity was determined from the film efficiency on removal of methylene blue (MB) under ultraviolet (UV). The results showed the greater MB removal efficiency of the PVA/TiO2 nanocomposite films with surfactant and thermal treatment than those without surfactant and thermal treatment.

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Effect of polyvinyl alcohol additive on the pore structure and morphology of the freeze-cast hydroxyapatite ceramics

Materials Science and Engineering C ◽

10.1016/j.msec.2009.11.003 ◽

2010 ◽

Vol 30 (2) ◽

pp. 283-287 ◽

Cited By ~ 58

Author(s):

Kai Hui Zuo ◽

Yu-Ping Zeng ◽

Dongliang Jiang

Keyword(s):

Polyvinyl Alcohol ◽

Pore Structure ◽

Structure And Morphology ◽

Hydroxyapatite Ceramics

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Enhanced functional properties of biodegradable Polyvinyl alcohol /carboxymethyl cellulose (PVA/CMC) composite films reinforced with L-alanine surface modified CuO nanorods

10.21203/rs.3.rs-918116/v1 ◽

2021 ◽

Author(s):

Yamanappagouda Amaregouda ◽

Kantharaju Kamanna ◽

Tilak Gasti ◽

Vijay Kumbar

Keyword(s):

Polyvinyl Alcohol ◽

Carboxymethyl Cellulose ◽

Food Packaging ◽

Composite Films ◽

Nanocomposite Films ◽

Soil Burial ◽

High Antibacterial Activity ◽

Active Food Packaging ◽

Surface Modified ◽

Cuo Nanorods

Abstract Herein, we described novel biogenic preparation of the CuO nanorods and its surface modification with L-alanine amino acid accelerated by microwave irradiation. The effect of surface functionalized CuO nanorods on the polyvinyl alcohol/carboxymethyl cellulose film physico-mechanical properties were investigated through various characterization techniques. The tensile strength was improved from 28.58 ± 0.73 MPa to 43.40 ± 0.93 MPa, UV shielding ability and barrier to the water vapors were highly enhanced when PVA/CMC matrices filled with 8 wt% of CuO-L-alanine. In addition, the prepared films exhibited acceptable overall migration limit and readily undergoes soil burial degradation. Nevertheless, CuO-L-alanine incorporated films showed potent antioxidant activity against DPPH radicals and had high antibacterial activity against Staphylococcus aureus and Escherichia coli, and antifungal activity against Candida albicans and Candida tropicalis. Furthermore, the nanocomposite films showed negligible cytotoxic effect on HEK293 and Caco-2 cell lines. In these contexts, the developed nanocomposite films can be implementing as an active food packaging material.

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Micromorphology and Characterization of V2O3 Nanoparticles Produced by the Liquid Phase Reduction-Heat Treatment

Materials Science Forum ◽

10.4028/www.scientific.net/msf.944.650 ◽

2019 ◽

Vol 944 ◽

pp. 650-656

Author(s):

Ming Rui Zhang ◽

Yuan Qin ◽

Dao Zhang ◽

Guang Yuan Wang ◽

Sen Yang

Keyword(s):

Heat Treatment ◽

Phase Composition ◽

Liquid Phase ◽

Thermal Treatment ◽

Oxalic Acid ◽

Structure And Morphology ◽

Phase Reduction ◽

Novel Method ◽

Composition Structure

The liquid phase reduction-heat treatment has been used to prepare V2O3nanoparticles in this paper. It is a novel method that the precursor was developed by Oxalic acid dehydrate (H2C2O4·2H2O) reduction of V2O5powder in anhydrous ethanol. V2O3nanoparticles were successfully obtained by thermal treatment of the precursor. The phase, composition, structure, and morphology of the as-obtained samples were verified by XRD, XPS, SEM and TEM measurements. Meanwhile, the possible formation mechanism of V2O3in the heat-treatment is briefly discussed by analyzing the DSC.

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Spectroscopic studies on Ag–polyvinyl alcohol nanocomposite films

Physica B Condensed Matter ◽

10.1016/j.physb.2005.04.031 ◽

2005 ◽

Vol 364 (1-4) ◽

pp. 328-332 ◽

Cited By ~ 57

Author(s):

B. Karthikeyan

Keyword(s):

Polyvinyl Alcohol ◽

Spectroscopic Studies ◽

Nanocomposite Films

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Improving the Performance of Feather Keratin/Polyvinyl Alcohol/Tris(hydroxymethyl)Aminomethane Nanocomposite Films by Incorporating Graphene Oxide or Graphene

Nanomaterials ◽

10.3390/nano10020327 ◽

2020 ◽

Vol 10 (2) ◽

pp. 327 ◽

Cited By ~ 1

Author(s):

Shufang Wu ◽

Xunjun Chen ◽

Tiehu Li ◽

Yingde Cui ◽

Minghao Yi ◽

...

Keyword(s):

Graphene Oxide ◽

Polyvinyl Alcohol ◽

Water Vapor Permeability ◽

Nanocomposite Films ◽

Light Transmittance ◽

Vapor Permeability ◽

Blend Films ◽

Feather Keratin ◽

Degradation Temperature ◽

Bionanocomposite Films

In this study, feather keratin/polyvinyl alcohol/tris(hydroxymethyl)aminomethane (FK/PVA/Tris) bionanocomposite films containing graphene oxide (GO) (0.5, 1, 2, and 3 wt%) or graphene (0.5, 1, 2, and 3 wt%) were prepared using a solvent casting method. The scanning electron microscopy results indicated that the dispersion of GO throughout the film matrix was better than that of graphene. The successful formation of new hydrogen bonds between the film matrix and GO was confirmed through the use of Fourier-transform infrared spectroscopy. The tensile strength, elastic modulus, and initial degradation temperature of the films increased, whereas the total soluble mass, water vapor permeability, oxygen permeability, and light transmittance decreased following GO or graphene incorporation. In summary, nanoblending is an effective method to promote the application of FK/PVA/Tris-based blend films in the packaging field.

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