Effect of Carbon-Based Particles on the Mechanical Behavior of Isotactic Poly(propylene)s

Garzón, Cristhian; Wilhelm, Manfred; Abbasi, Mahdi; Palza, Humberto

doi:10.1002/mame.201500380

Cited by 12 publications

(4 citation statements)

References 83 publications

(314 reference statements)

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“…For the oxidation of the graphite, the Hummers and Offeman methodology was used [38]. In short, potassium permanganate and sodium nitrate were used to oxidize the graphite powder in concentrated sulfuric acid solution as described by the authors of Reference [39]. All reagents were obtained from Merck (Darmstadt, Germany).…”

Section: Synthesis Of Graphene Oxide (Go) and Thermally Reduced Graphmentioning

confidence: 99%

Electroactive 3D Printed Scaffolds Based on Percolated Composites of Polycaprolactone with Thermally Reduced Graphene Oxide for Antibacterial and Tissue Engineering Applications

et al. 2020

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Applying electrical stimulation (ES) could affect different cellular mechanisms, thereby producing a bactericidal effect and an increase in human cell viability. Despite its relevance, this bioelectric effect has been barely reported in percolated conductive biopolymers. In this context, electroactive polycaprolactone (PCL) scaffolds with conductive Thermally Reduced Graphene Oxide (TrGO) nanoparticles were obtained by a 3D printing method. Under direct current (DC) along the percolated scaffolds, a strong antibacterial effect was observed, which completely eradicated S. aureus on the surface of scaffolds. Notably, the same ES regime also produced a four-fold increase in the viability of human mesenchymal stem cells attached to the 3D conductive PCL/TrGO scaffold compared with the pure PCL scaffold. These results have widened the design of novel electroactive composite polymers that could both eliminate the bacteria adhered to the scaffold and increase human cell viability, which have great potential in tissue engineering applications.

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Section: Synthesis Of Graphene Oxide (Go) and Thermally Reduced Graphmentioning

confidence: 99%

Electroactive 3D Printed Scaffolds Based on Percolated Composites of Polycaprolactone with Thermally Reduced Graphene Oxide for Antibacterial and Tissue Engineering Applications

et al. 2020

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“…The liquid‐solid transition can be detected from the Van Gurp‐Palmen plots of the nanocomposites, which can inform about the microstructure of a multiphase system. A Van Gurp‐Palmen plot relates the absolute value of the complex modulus (G * ) to the phase shift angle (δ), where the liquid‐like behavior of melt is indicated by

\lim_{G^{*} \to 0} normalδ

= 90° and for a solid‐like behavior, δ drops toward zero 26,48 …”

Section: Resultsmentioning

confidence: 99%

Analysis of dual role of nanographene on the microstructure‐properties correlation of TPU/NG nanocomposite

Gholizadeh

Babaei

Ziaratban

2020

Polymers for Advanced Techs

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Synthesis of nanographene (NG) and thermoplastic polyurethane (TPU)/NG nanocomposites by a facile and cost‐effective method was pursued in this work. For that purpose, NG was synthesized via a combination of microwave (MW) and shear mixing done by a simple kitchen blender. Next, TPU/NG nanocomposites were prepared by the kitchen blender in the solution state. Afterward, with variable amounts of the NG, TPU/NG nanocomposites were fabricated and their mechanical and rheological performances were comprehensively studied. It was established that the dispersion quality of NG had a fundamental impact on the rheological and mechanical properties of the fabricated nanocomposites which were even more fascinating than that of other nanofillers. It was discussed and suggested that this interesting presentation might have been originated from the dual role (reinforcement and a lubricant agent) of NG due to its size, dispersion state, and added amount.

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“…Hummers and Offeman method was used to obtain GO as reported in GARZON et al [29]. Ten milligrams of GO were suspended in 30 ml of deionized water by ultrasonic bath resulting in a colloidal suspension.…”

Section: Synthesis and Characterization Of The Nanocompoundsmentioning

confidence: 99%

Anti-adhesion and antibacterial activity of silver nanoparticles and graphene oxide-silver nanoparticle composites

et al. 2020

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The rise of nanotechnology has allowed the development of several inorganic nanoparticles with strong biocidal properties against bacteria, fungi, and viruses. Among them, silver nanoparticles (AgNPs) stand out as one of the most promising antimicrobial nanomaterials. Graphene oxide (GO) is another attractive nanomaterial with antimicrobial properties. Although the antimicrobial effect of AgNPs and GO is known, the development of hybrid materials of GO-AgNPs has considerable interest in various applications since they may exhibit synergistic bactericidal properties that exceed the yields of the individual components. The aims of this work were to evaluate the antimicrobial activity and anti-adhesion properties of AgNPs and GO-AgNPs nanocomposites for potential applications in antimicrobial coatings. The antimicrobial activity was tested by agar diffusion method. It was found that activity varied according to the synthesis procedure of the nanomaterials. Pseudomonas aeruginosa, Bacillus cereus and Kokuria rhizophila were the most susceptible strains. The nanocomposite GO-AgNPs synthetized using the ex-situ method exhibited the highest antibacterial activity against all the assayed strains. Similar results were obtained for bacterial adhesion inhibition tests. Thus, GO-AgNPs nanohybrids could be applied as antibacterial coatings to prevent bacterial biofilm development.

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Effect of Carbon-Based Particles on the Mechanical Behavior of Isotactic Poly(propylene)s

Cited by 12 publications

References 83 publications

Electroactive 3D Printed Scaffolds Based on Percolated Composites of Polycaprolactone with Thermally Reduced Graphene Oxide for Antibacterial and Tissue Engineering Applications

Electroactive 3D Printed Scaffolds Based on Percolated Composites of Polycaprolactone with Thermally Reduced Graphene Oxide for Antibacterial and Tissue Engineering Applications

Analysis of dual role of nanographene on the microstructure‐properties correlation of TPU/NG nanocomposite

Anti-adhesion and antibacterial activity of silver nanoparticles and graphene oxide-silver nanoparticle composites

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