Development of multifunctional polymer nanocomposites with carbon-based hybrid nanostructures synthesized from ferrocene

Riquelme, J.; Garzón, Cristhian; Bergmann, Carlos Pérez; Geshev, J.; Quijada, Raúl

doi:10.1016/j.eurpolymj.2015.12.007

Cited by 20 publications

(8 citation statements)

References 54 publications

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“…They have obtained a coercivity of ∼40 Oe, which is around 4% of the value in our results. Similarly, Riquelme et al . reported coercivity values between 500 and 550 Oe for polypropylene magnetic nanocomposites with 2%–6% of CNT‐Fe obtained by melt mixing.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of high‐density polyethylene/rGO‐CNT‐Fe nanocomposites with outstanding magnetic and electrical properties

Nisar

Bergmann

Geshev

et al. 2017

J of Applied Polymer Sci

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Semi-conducting polyethylene (PE) nanocomposites with outstanding magnetic properties at room temperature were synthesized. These exceptional properties, for a diamagnetic and insulating matrix as PE, were obtained by polymerizing ethylene in the presence of a catalytic system formed by a metallocene catalyst supported on a mixture of reduced graphene oxide (rGO) and carbon nanotubes with encapsulated iron (CNT-Fe). It was used a constant and very low amount of CNT-Fe, obtained by vapor chemical deposition using ferrocene. The percolation threshold, to achieve conductivity, was obtained using a variable amount of rGO. The nanocomposites were semiconductors with the addition of 2.8 wt % and 6.0 wt % of the filler, with electrical conductivities of 4.99 3 10 26 S cm 21 and 7.29 3 10 24 S cm 21 , respectively. Very high coercivity values of 890-980 Oe at room temperature were achieved by the presence of only 0.04-0.06 wt % of iron in the nanocomposites. The novelty of this work is the production of a thermoplastic with both, magnetic and electric properties at room temperature, by the use of two fillers, that is rGO and CNT-Fe. The use of a small amount of CNT-Fe to produce the magnetic properties and variable amount of rGO to introduce the electrical conductivity in PE matrix let to balance both properties. The encapsulation strategy used to obtain Fe in CNT, protect Fe from easy oxidation and aggregation.

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Section: Resultsmentioning

confidence: 99%

Synthesis of high‐density polyethylene/rGO‐CNT‐Fe nanocomposites with outstanding magnetic and electrical properties

Nisar

Bergmann

Geshev

et al. 2017

J of Applied Polymer Sci

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“…Recently, to improve the electrical conductivity, thermal conductivity, and barrier properties, the production of PP–graphene and PP–CNT nanocomposites have been reported . Various methods have been used to produce nanocomposites: solution mixing, in situ polymerization, and melt blending . However, there are limitations of solution mixing in the case of PP and polyethylene because these polymers are soluble in solvents, such as xylene and trichlorobenzene, only above 120 °C; this can cause serious health risks .…”

Section: Introductionmentioning

confidence: 99%

“…Multifunctional magnetic polymer composites can be used in various fields, such as in microwave absorbers, biomedicine, magnetic recording materials, information technology, energy storage devices, magnetic resonance imaging, magnetic sensors, catalysis, drug delivery, telecommunications, and environmental remediation . Magnetic polymer nanocomposites can be obtained by the introduction of a range of magnetic elements, such as iron, nickel, and cobalt, in a diamagnetic polymer matrix with different polymerization techniques .…”

Section: Introductionmentioning

confidence: 99%

Polypropylene nanocomposites with electrical and magnetic properties

Nisar

Bernd

Filho

et al. 2018

J of Applied Polymer Sci

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The magnetic and conducting properties of polypropylene (PP)-reduced graphene oxide (rGO)-carbon nanotube with iron (CNT-Fe) nanocomposites prepared by melt mixing were studied. CNT-Fes were synthesized by the pyrolysis of sawdust, and rGO was produced from graphite flakes. The combination of these two materials was used to produce magnetic and conducting properties in a diamagnetic and insulating PP matrix with the addition of a small amount of filler. A constant and minute amount of CNT-Fes was sufficient to introduce magnetic characteristics to the PP matrix. A variable amount of rGO was used, and the percolation threshold was achieved with the use of only 2.1 wt % rGO. All samples reached magnetic saturation at about 4.2 kOe, with an identical coercivity of 150 Oe and a normalized remnant magnetization of 0.14. Thermogravimetric and differential scanning calorimetry analyses showed enhancements in the maximum degradation temperature, melting temperature, crystallization temperature, and crystallinity. The nanocomposites showed better mechanical and barrier properties than the neat polymer. The novelty of this study was the use of a filler derived from waste combined with rGO to obtain a thermoplastic nanocomposite with both magnetic and conducting properties at room temperature. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46820.

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“…It was these results that further urged us to continue searching for new reaction schemes for the production of carbon at ambient conditions in an energy-liberating manner. Ferrocene Fe(C5H5)2, an organometallic compound consisting of two cyclopentadienyl rings bonded by divalent iron (II), is a versatile precursor towards carbon materials by pyrolysis (i.e., an energy consuming process) [6][7][8]. Fewer works also refer to hydrothermal carbonization of ferrocene, which, however, is an energy consuming process as well [9].…”

Section: Methodsmentioning

confidence: 99%

Rapid Carbon Formation from Spontaneous Reaction of Ferrocene and Liquid Bromine at Ambient Conditions

et al. 2020

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Herein, we present an interesting route to carbon derived from ferrocene without pyrolysis. Specifically, the direct contact of the metallocene with liquid bromine at ambient conditions released rapidly and spontaneously carbon soot, the latter containing dense spheres, nanosheets, and hollow spheres. The derived carbon carried surface C-Br bonds that permitted postfunctionalization of the solid through nucleophilic substitution. For instance, treatment with diglycolamine led to covalent attachment of the amine onto the carbon surface, thus conferring aqueous dispersability to t he solid. The dispersed solid exhibited visible photoluminescence under UV irradiation as a result of surface passivation by the amine. Hence, the present method not only allowed a rapid and spontaneous carbon formation at ambient conditions, but also surface engineering of the particles to impart new properties (e.g., photoluminescence).

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Development of multifunctional polymer nanocomposites with carbon-based hybrid nanostructures synthesized from ferrocene

Cited by 20 publications

References 54 publications

Synthesis of high‐density polyethylene/rGO‐CNT‐Fe nanocomposites with outstanding magnetic and electrical properties

Synthesis of high‐density polyethylene/rGO‐CNT‐Fe nanocomposites with outstanding magnetic and electrical properties

Polypropylene nanocomposites with electrical and magnetic properties

Rapid Carbon Formation from Spontaneous Reaction of Ferrocene and Liquid Bromine at Ambient Conditions

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