Synthesis of polyethylene/silica-silver nanocomposites with antibacterial properties by in situ polymerization

Pavoski, Giovani; Kalikoski, Renan Rodrigues; Souza, Gustavo; Brum, Luiz Fernando Wentz; Santos, Cristiane dos; Santos, João Henrique Zimnoch dos; Font, Xavier; Dell'Erba, Ignacio Esteban; Galland, Griselda B.

doi:10.1016/j.eurpolymj.2018.07.011

Cited by 19 publications

(10 citation statements)

References 62 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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“…Pavoski et al 75 applied in-situ polymerization with supported and non-supported catalysts for polyethylene/ silica-silver nanocomposites synthesis. For polymerization with a non-supported catalyst, toluene as a solvent and methylaluminoxane as a scavenger and co-catalyst are added to a reactor, followed by adding a suspension of SiAg in toluene.…”

Section: In-situ Synthesis Methodsmentioning

confidence: 99%

Fabrication techniques of polymeric nanocomposites: A comprehensive review

Kamal

Ashmawy

Shanmugan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Nanotechnology is the key solution for many human problems such as energy conversion, water treatment, and material science. In composite materials, nanoparticles are dispersed in a matrix material such as metals, ceramics, or polymers to enhance their mechanical and thermophysical properties. Polymer nanocomposite materials found their applications in vital fields such as the automotive and aircraft industries. There are many techniques adopted to produce polymer nanocomposites, and they are summarized and discussed according to our best known in this paper. All techniques aim to produce nanocomposite materials with uniform dispersion and without aggregations. Melt-mixing, mixing, in-situ polymerization, electrospinning, and selective laser sintering techniques are the most commonly used techniques to produce polymer nanocomposite. The utilization of water, atomic layer deposition, and plasma-assisted mechanochemistry are found to eradicate the issue of nanoparticles aggregation for melt-mixing technique. Also, sonication with high frequencies plays the same role for mixing techniques. In-situ polymerization provides fabrication of nanocomposites that are thermodynamically stable. Electrospinning represents an effective method which is suitable for producing porous structures. In addition, fabrication of nanocomposites via selective laser sintering has obvious benefits to overcome the problem of aggregation. The working principles of each technique, including the advantages and disadvantages, are discussed.

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“…Antimicrobial materials are not only used in medical applications, such as catheters [ 7 ] and prostheses [ 8 ], but also in food packaging [ 9 , 10 ] and in paint industry [ 11 ] among others. One must be aware of the different public sectors where there is the possibility of proliferation of bacteria and fungi, such as hospitals, schools, offices, etc., where infectious diseases can be transmitted through surfaces [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Silver-titanium polymeric nanocomposite non ecotoxic with bactericide activity

2022

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Graphical Abstract In view of the intense interest in applications of silver nanoparticles in products for the medical field and in food preservation packaging due to their antimicrobial properties, the ecotoxicology of silver nanocomposites was evaluated in films. Test with the sea urchin Echinometra lucunter , to evaluate embryonic development and contamination by the action of silver and titanium nanoparticles in polyethylene nanocomposite films presents new results. The silver nanoparticle’s stability in polymeric materials can be enhanced by adding carriers, such as titanium dioxide and montmorillonite clay (MMT) without to producing one unfriendly material. For this research, low-density polyethylene (LDPE)/linear low-density polyethylene (LLDPE) were used processed in a twin-screw extruder, followed by gamma irradiation with 25 kGy and characterized by ecotoxicology assays, field emission scanning electron microscopy (FESEM), scanning electron microscopy and energy dispersive spectroscopy (SEM–EDX), differential scanning calorimetry (DSC), thermogravimetric analysis (TG), Raman spectroscopy (SERS) and mechanical properties. The antibacterial properties of the LDPE films were investigated against Escherichia coli and Staphylococcus aureus . The gamma irradiation had an important effect in the synthesis of silver nanoparticles resulting in bactericidal activity and the death of 100% of the tested bacteria. The evaluation of the environment was considered with the ecotoxicological investigation carried out. The results indicated that the polymeric films with silver nanoparticles and TiO 2 do not contaminate the environment and neither interfere with the larval development of Echinometra lucunter . The obtained materials can be used in various applications with antimicrobial properties.

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Synthesis of polyethylene/silica-silver nanocomposites with antibacterial properties by in situ polymerization

Cited by 19 publications

References 62 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

Fabrication techniques of polymeric nanocomposites: A comprehensive review

Silver-titanium polymeric nanocomposite non ecotoxic with bactericide activity

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