Polypropylene nanocomposites with electrical and magnetic properties

Nisar, Muhammad; Bernd, Maria da Graça Sebag; Filho, Luiz Carlos Pinto da Silva; Geshev, J.; Basso, Nara Regina de Souza; Galland, Griselda B.

doi:10.1002/app.46820

Cited by 6 publications

(8 citation statements)

References 67 publications

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“…The highest increase in the modulus was shown by PE‐Fe‐C‐2% and PE‐Ni‐C‐2%, exhibiting an enhancement of 33% (from 607 to 893 and 906 MPa, respectively); similar enhancements are reported by other researchers using graphene nanosheets and carbon nanotubes . The improvement in the modulus is attributed to the filler loading and their uniform dispersion in the PE matrix, leading to strong interfacial adhesion, which results in an actual load transmission from the nanoparticles to the polymer . These effects indicate an increase in the nanocomposites' rigidity because of the presence of the filler .…”

Section: Resultssupporting

confidence: 76%

“…However, to broaden its industrial application, the physicochemical properties need to be improved further . To date, different methods namely melt blending, in situ polymerization, and solution mixing have been used to prepare nanocomposites . Melt blending is often used; however, to disperse the fillers in the PE matrix homogenously is difficult to be attained because of the insufficient compatibility between the materials .…”

Section: Introductionmentioning

confidence: 99%

“…The focus of our research group is to prepare polyolefin nanocomposites by melt mixing and in situ polymerization techniques. Recently, we reported the synthesis of polyolefins‐carbon nanotubes magnetic nanocomposites (PE‐CNT‐Fe and PP‐CNT‐Fe), obtaining a uniform dispersion of the nanoparticles in the polyolefin matrices . More recently, we studied the introduction of Ni‐carbonized magnetic nanoparticles produced from the wood biomass (cost‐effective materials), using the microwave for the pyrolysis to carbonize the material, and used as filler in PE nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

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Polyethylene Nanocomposites with Ni, Co, and Fe Carbon‐Based Magnetic Fillers

Nisar

Thue

Heck

et al. 2020

Polymer Engineering & Sci

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In the present study, the effect of Ni, Co, and Fe carbonbased magnetic fillers (Ni-C, Co-C, and Fe-C) was investigated on the magnetic, mechanical, thermal, and morphological properties of polyethylene nanocomposites. The in situ polymerization technique was used to prepare nanocomposites of polyethylene from the ethylene monomer introducing small amounts of filler ranging from 1 to 2 wt.%. The metal-carbonized fillers were obtained by pyrolysis of wood sawdust activated by Ni, Co, or Fe salts. X-ray diffraction showed that the fillers were of nanometric size. Thermogravimetric analysis was executed to investigate the thermal strength of the materials as well as to calculate the metal content in the carbon-based fillers. The onset degradation temperature showed an enhancement of 17 C, whereas the maximum degradation temperatures increased 4 C with the introduction of the filler. Differential scanning calorimetry indicated an improvement of 3 C in crystallization temperature, whereas the melting temperature remained unchanged compared to neat polyethylene. The filler was shown to increase the modulus of elasticity of the nanocomposites. The addition of 1.0 wt.% of the metal-carbonized material in the diamagnetic polymer matrix resulted in a thermoplastic nanocomposite with ferromagnetic behavior. POLYM. ENG. SCI., 60:988-995, 2020. 989 e C.A. = catalytic activity [kgPE [Zr] −1 h −1 bar −1 ]. f X c = degree of crystallinity calculated from the DSC curve.

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Section: Resultssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polyethylene Nanocomposites with Ni, Co, and Fe Carbon‐Based Magnetic Fillers

Nisar

Thue

Heck

et al. 2020

Polymer Engineering & Sci

Self Cite

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“…[1,2] The introduction of nanofiller particles, such as clay nanosheets, graphite, and carbon nanotubes, enhances both the mechanical and thermal properties of the PNC as compared to the neat polymer matrix. [3][4][5] Depending upon the nanofillers used, it can be transformed by creating thermal and/or electrical conductive network in the polymer matrix, [6,7] hence giving rise to antimicrobial properties or improving fire-retardant characteristics. [8] In fact, the design of nanocomposites can aid in excessive applications ranging from high-strength structural materials to gas separation membranes.…”

Section: Introductionmentioning

confidence: 99%

“…[22] Various techniques have been used to prepare polyolefin nanocomposites such as melt blending, solution mixing, and in situ polymerization. [4,5,23] However, each of these methods presents some technical limitations, being solvent mixing method the less desirable from an economical and environmental point of view. In fact, based on PE and polypropylene (PP) nanocomposites the solvent mixing method is not practical meanwhile these polyolefins are generally used to solubilized in the solvents like trichlorobenzene and xylene at elevated temperature (eg, 120 C), causing serious health problems.…”

Section: Introductionmentioning

confidence: 99%

Metal activated carbon as an efficient filler for high‐density polyethylene nanocomposites

et al. 2020

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interesting properties of magnetic nanocomposites have attracted attention of both academic and industrial researchers. In this work, thermal, mechanical, morphological, and magnetic properties of polyethylene (PE) nanocomposites were inspected using carbon-based magnetic fillers (C Ni, C Co, and C Fe).The melt mixing method was employed to prepare the nanocomposites using small amounts of filler ranging up to 2 wt%. Wood sawdust pyrolysis produces carbonized material activated by Ni, Co, or Fe salts and used as filler. The structural analysis was carried out using Fourier transform infrared spectroscopy indicating that the polymer chemical structure remains unaltered with the filler addition. Thermal stability of nanocomposites as well as the determination of metal amount in the carbon-based fillers was investigated by thermogravimetric analysis. Filler introduction enhanced the onset and the maximum degradation temperatures up to 11 C and 8 C, respectively. The crystallization and melting temperatures examined by differential scanning calorimetry remained unchanged as compared to neat PE whereas the percent crystallinity was improved up to 8%. The incorporation of the filler leads to the improvement in the elastic modulus of the polymer matrix. The addition of 2.0 wt% of the metal-carbonized filler in the diamagnetic polymer resulted in a thermoplastic nanocomposite with ferromagnetic behavior.

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The morphology evolution of polyethylene produced in the presence of a Ziegler‐type catalyst anchored on the surface of multi‐walled carbon nanotubes

Zdanovich

Мосеенков

Ищенко

et al. 2021

J of Applied Polymer Sci

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Data are presented on the evolution of the morphology of polyethylene (PE) formed via in situ polymerization with different polymer yield over a Ziegler‐type titanium‐magnesium catalyst anchored on the CNT surface. Individual polymer microparticles are formed on the CNT surface at the initial polymerization stage (the yield of 2.5–10 g PE/g CNT) with the formation of PE/CNT composites having a shish‐kebab structure. As the polymer yield increases above 10 g PE per g CNT, the size of microparticles increases and the CNT surface gets totally covered with the polymer. We have found also a great effect produced by the morphology of initial CNT particle aggregates of individual nanotubes on the morphology of macroparticles in PE/CNT composites and the uniformity of CNTs distribution in PE/CNT composites. In the case of CNT samples with a loose structure of macroparticles (aggregates of entangled nanotubes), it is possible to obtain a homogeneous distribution of nanotubes in the polymer matrix of composites and increase the electrical conductivity of composites by 1–8 orders of magnitude by varying the CNT content in the composites from 0.9 to 2.8 wt%.

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Polypropylene nanocomposites with electrical and magnetic properties

Cited by 6 publications

References 67 publications

Polyethylene Nanocomposites with Ni, Co, and Fe Carbon‐Based Magnetic Fillers

Polyethylene Nanocomposites with Ni, Co, and Fe Carbon‐Based Magnetic Fillers

Metal activated carbon as an efficient filler for high‐density polyethylene nanocomposites

The morphology evolution of polyethylene produced in the presence of a Ziegler‐type catalyst anchored on the surface of multi‐walled carbon nanotubes

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