Silver nanoparticles encapsulated in silica: Synthesis, characterization and application as antibacterial fillers in the ethylene polymerization

Pavoski, Giovani; Baldisserotto, Daniel Luiz Stamm; Maraschin, Thuany Garcia; Brum, Luiz Fernando Wentz; Santos, Cristiane dos; Santos, João Henrique Zimnoch dos; Brandelli, Adriano; Galland, Griselda B.

doi:10.1016/j.eurpolymj.2019.04.055

Cited by 21 publications

(9 citation statements)

References 46 publications

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“…However, for the nanocomposites containing either 1 or 5% ZnO the bacteria did not proliferate, indicating the inhibitory action of ZnO (Figures 6b and 6d). In addition, the inhibition diameters were always limited to the contact area of the PEZnO films, suggesting that ZnO diffusion through the agar matrix was negligible, this behavior was already observed in our previous works 22,23 with SiAg fillers. It has been seen that in nanocomposites of UHMWPE/ZnO the inhibition area has only some significance when 20% of ZnO were used.…”

Section: Resultssupporting

confidence: 75%

“…The use of a metallocene catalyst allows greater control of the polymer structure. 21 Bis(cyclopentadienyl) zirconium dichloride (Cp 2 ZrCl 2 ) catalyst was chosen because it is the simplest and cheapest among metallocenes, which facilitates synthesis and it was used with success in our previous works 22,23 with polyethylene/silica-silver (PE/SiAg) nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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Antimicrobial High-Density Polyethylene (HDPE)/ZnO Nanocomposites Obtained by in situ Polymerization

Pavoski¹,

Kalikoski²,

Souza³

et al. 2020

J. Braz. Chem. Soc.

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Nanostructured zinc oxide (ZnO) prepared by combustion in solution was used to obtain nanocomposites. The ZnO particles were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), and scanning electron microscopy (SEM), showing crystallite size of 32 nm and a superficial area of 32.6 m 2 g -1 . Nanocomposites with 1, 3, and 5 wt.% of ZnO in the polymeric matrix were obtained using the in situ polymerization of ethylene with catalytic activities between 1500-1700 kg (mol Zr h P E ) -1 . The high-density polyethylene nanocomposites (PEZnO) were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), SEM, and transmission electron microscopy (TEM). The nanocomposites with 1 wt.% ZnO gave excellent mechanical properties, and all were active against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria.

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Section: Resultssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Antimicrobial High-Density Polyethylene (HDPE)/ZnO Nanocomposites Obtained by in situ Polymerization

Pavoski¹,

Kalikoski²,

Souza³

et al. 2020

J. Braz. Chem. Soc.

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“…This is in contrast to the result reported by Huynh Nguyen Thanh Luan [18] but consistent with the result published by G. Pavoski. [19]…”

Section: The Effect Of Nano-silver On Antibacterial Property Of Matrimentioning

confidence: 99%

The effect of nano‐silver on the properties of epoxidized rubber seed oil composite

Thủy

Trung²,

Tuấn

et al. 2020

Vietnam Journal of Chemistry

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The Unidrive X1000 CAT mixer was used to disperse nano‐silver into matrix resin. The field emission scanning electron micrograph showed the flock of nano‐silver has burst into smaller clusters and dispersed evenly in epoxidized rubber seed oil. Two bacterial strains: gram‐positive bacterial (S. aureus) and gram‐negative bacterial (E. coli) were used to evaluate the antibacterial property of sample. The results showed matrix resin without nano‐silver possessed antibacterial property with both strains. The presence of nano‐silver raised the gram‐positive antibacterial property but reduced gram‐negative antibacterial property of matrix resin. The viscosity of matrix resin containing different nano‐silver contents was unchanged except 100 ppm. Moreover, the presence of nano‐silver has prolonged the and curing time but increased maximum exothermal temperature of emission. In general, the presence of nano‐silver improved strongly in mechanical properties of composite especially nano‐silver content of 20 to 60 ppm.

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“…AgNPs and ZnONPs have been widely used as fillers in polymer matrices to enhance their optical, catalytic, electrical, and conductivity properties [37]. For instance, Pavoski et al (2019) [38] encapsulated AgNPs in silica and used them as antibacterial fillers in ethylene polymerization for potential application in active medicine packages. They exhibited good antibacterial activity towards Staphylococcus aureus with a 25 mm zone of inhibition.…”

Section: Introductionmentioning

confidence: 99%

Electroconductive Polyaniline–Ag-ZnO Green Nanocomposite Material

et al. 2022

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Metal-conducting polyaniline (PANI)-based nanocomposite materials have attracted attention in various applications due to their synergism of electrical, mechanical, and optical properties of the initial components. Herein, metal-PANI nanocomposites, including silver nanoparticle-polyaniline (AgNP-PANI), zinc oxide nanoparticle-polyaniline (ZnONP-PANI), and silver-zinc oxide nanoparticle-polyaniline (Ag–ZnONP-PANI), were prepared using the two processes. Nanocomposite-based electrode platforms were prepared by depositing AgNPs, ZnONPs, or Ag–ZnONPs on a PANI modified glass carbon electrode (GCE) in the presence of 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide/N-Hydroxysuccinimide (EDC/NHS, 1:2) as coupling agents. The incorporation of AgNPs, ZnONPs, and Ag–ZnONPs onto PANI was confirmed by UV-Vis spectrophotometry, which showed five absorbance bands at 216 nm, 412 nm, 464 nm, 550 nm, and 831 nm (i.e., transition of π-π*, π-polaron band transition, polaron-π* electronic transition, and AgNPs). The FTIR characteristic signatures of the nanocomposite materials exhibited stretching arising from C–H aromatic, C–O, and C–N stretching mode for benzenoid rings, and =C–H plane bending vibration formed during protonation. The CV voltammograms of the nanocomposite materials showed a quasi-reversible behavior with increased redox current response. Notably, AgNP–PANI–GCE electrode showed the highest conductivity, which was attributed the high conductivity of silver. The increase in peak currents exhibited by the composites shows that AgNPs and ZnONPs improve the electrical properties of PANI, and they could be potential candidates for electrochemical applications.

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Silver nanoparticles encapsulated in silica: Synthesis, characterization and application as antibacterial fillers in the ethylene polymerization

Cited by 21 publications

References 46 publications

Antimicrobial High-Density Polyethylene (HDPE)/ZnO Nanocomposites Obtained by in situ Polymerization

Antimicrobial High-Density Polyethylene (HDPE)/ZnO Nanocomposites Obtained by in situ Polymerization

The effect of nano‐silver on the properties of epoxidized rubber seed oil composite

Electroconductive Polyaniline–Ag-ZnO Green Nanocomposite Material

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