Antimicrobial activity of acrylic polyurethane/Fe3O4-Ag nanocomposite coating

In this article, ZnO-Ag nanohybrids were chemically synthesized in the aqueous medium by reducing silver nitrate with sodium borohydride NaBH4. These nanohybrids were then homogeneously dispersed into the diacrylate urethane/1,6-hexanediol diacrylate resin system at a content of 2 wt%. The structural morphology, mechanical resistances, and crosslinking of the as-prepared nanocomposite coating (nanocoating) were evaluated. The antimicrobial characteristic was tested by keeping track of the lag-log growth phase of E. coli bacteria in the coating existence among cell cultures. The obtained data indicated that the nanohybrids added into the UV curing diacrylate urethane matrices had significantly increased the abrasion resistance, relative hardness, and conversion of the acrylate groups of the nanocoating. In addition, the antibacterial test revealed that the nanocoating had good antibacterial property against E. coli, whereas for the pure coating (without ZnO-Ag nanoparticles), there was no antibacterial activity observed.

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The Synergistic Effects of Sio2 Nanoparticles and Organic Photostabilizers for Enhanced Weathering Resistance of Acrylic Polyurethane Coating

Journal of Composites Science ◽

10.3390/jcs4010023 ◽

2020 ◽

Vol 4 (1) ◽

pp. 23 ◽

Cited By ~ 2

Author(s):

Thien Vuong Nguyen ◽

Tuan Anh Nguyen ◽

Thi Hau Nguyen

Keyword(s):

Synergistic Effects ◽

Sio2 Nanoparticles ◽

Nanocomposite Coating ◽

Polyurethane Coating ◽

Nano Sio2 ◽

Aging Test ◽

Before And After ◽

Acrylic Coatings ◽

Acrylic Polyurethane ◽

Weathering Resistance

This study aims to evaluate the synergical effects of SiO2 nanoparticles (nano-SiO2) and organic photostabilizers (Tinuvin 384 (T384) and Tinuvin 292 (T292)) on the weathering resistance of acrylic polyurethane coating. Data obtained from infrared (IR), field emission scanning electron microscopy (FESEM), and weight loss of coatings (before and after aging test), suggest that the SiO2 nanoparticles play a dual role, as both reinforcer and UV absorber, thus improving effectively both the mechanical properties and the weathering resistance of polyurethane acrylic coatings. The nanocomposite coating containing 2 wt % nano-SiO2, 2 wt % T384, and 1 wt % T292 exhibits excellent weathering and abrasion resistances, offering a durable outdoor application.

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Polymer/metal nanocomposite coating with antimicrobial activity against hospital isolated pathogen

Applied Surface Science ◽

10.1016/j.apsusc.2016.04.109 ◽

2016 ◽

Vol 379 ◽

pp. 489-496 ◽

Cited By ~ 21

Author(s):

D. Carvalho ◽

T. Sousa ◽

P.V. Morais ◽

A.P. Piedade

Keyword(s):

Antimicrobial Activity ◽

Nanocomposite Coating ◽

Polymer Metal ◽

Metal Nanocomposite

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Acid and alkali resistance of Acrylic polyurethane/R-SiO2 nanocomposite coating

Vietnam Journal of Chemistry ◽

10.1002/vjch.2019000124 ◽

2020 ◽

Vol 58 (1) ◽

pp. 67-73

Author(s):

Nguyen Thi Mai ◽

Bui Thi Mai Anh ◽

Nguyen Thien Vuong

Keyword(s):

Nanocomposite Coating ◽

Alkali Resistance ◽

Acid And Alkali Resistance ◽

Acrylic Polyurethane

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Antimicrobial activity and application of nanocomposite coating from chitosan and ZnO nanoparticle to inhibit microbial growth on fresh-cut papaya

Food Research ◽

10.26656/fr.2017.4(2).255 ◽

2019 ◽

Vol 4 (2) ◽

pp. 307-311 ◽

Cited By ~ 2

Author(s):

M. Lavinia ◽

S.N. Hibarturrahman ◽

H. Harinata ◽

Ata Aditya Wardana

Keyword(s):

Antimicrobial Activity ◽

Storage Time ◽

Microbial Growth ◽

Average Diameter ◽

Nanocomposite Coating ◽

Zno Nanoparticle ◽

Minimally Processed ◽

Particle Size Analyzer ◽

Postharvest Life ◽

Fresh Cut

Fresh-cut papaya is one of the perishable minimally processed product due to microbial decay rate. In this work, a novel nanocomposite coating was developed as a possible method for maintaining the quality attributes of the samples. Chitosan and ZnO nanoparticles (ZnONP) were selected to inhibit microbial growth on fresh-cut papaya. The aims of this work were to evaluate the antimicrobial activity and effect of nanocomposite coating made of chitosan combined with ZnONP on microbial growth of fresh-cut papaya stored for 12 days at 10°C. The preliminary work was conducted to select the best formulation exhibiting the greatest bacterial inhibition effect which was chitosan combined with 0.027% ZnONP (by weight of nanocomposite solution). The results revealed that the average diameter of ZnO was 611.30 nm with polydispersion index of 0.011 confirmed by particle size analyzer (PSA). All components were completely contained in nanocomposite analyzed by Fourier-Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM) for its microstructure and presence of ZnONP in the film. Selected nanocomposite application on fresh-cut papaya could suppress microbial growth significantly in comparison with uncoated papaya during storage time. Our study suggests that nanocomposite treatment provides a desirable method to maintain and improve freshcut papaya postharvest life.

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