The Effect of Filler Orientation and Distribution on the Electrical and Mechanical Properties of Graphene Based Polymer Nanocomposites

Rajamani, Praveen Kannan; Boros, Róbert

doi:10.14513/actatechjaur.v11.n4.479

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…It has been observed that in many of the literature studies using similar matrices, [ 62–67 ] the amount of graphene and CNT used in these studies ranges from 1.6 to 3.3 times higher than in the work presented in this article to achieve conductivity values up to 1000 times lower than those shown in Figure 8. As shown in Figure 8, the abrupt increase in the electron conductivity from 10 −12 S/cm (nonmodified polymer matrix) to 10 −5 ‐10 −4 S/cm (nanocomposites), indicates a higher degree of connectivity within the embedded conducting phase, suggesting that electric percolation was attained.…”

Section: Resultsmentioning

confidence: 78%

Hybrids nanocomposites based on a polymer blend (linear low‐density polyethylene/poly(ethylene‐co‐methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube)

et al. 2020

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Interfacial or separate phase location of carbonaceous nanofillers (graphene and carbon nanotubes) in polymer blends with co‐continuous phases can lead to double percolation behavior, significantly increasing rheological and electrical properties. The prediction of the morphology and the location of the nanofillers has been used as a tool to evaluate the proprieties of co‐continuous polymer blends. This work aims to highlight the superior conductivity levels achieved using a low amount of carbon‐based fillers, by the proper selection in a multiphase polymer matrix as a template for controlled dispersion and spatial distribution of the nanoparticles, offering a compromise between easy processability and enhanced performance. Here, two polymers (linear low‐density polyethylene [LLDPE] and ethylene‐co‐methylacrylate [EMA]) and their co‐continuous blend (LLDPE/EMA) were loaded with nanofillers (few‐layer graphene [FLG], few‐walled carbon nanotube [FWCNT]) via continuous melt mixing in twin‐screw extrusion, separate and simultaneously. It was observed that the addition of the nanofillers changed the co‐continuity of the blend, with the probable migration of the nanofillers from the EMA (hydrophilic) phase to the LLDPE (hydrophobic) phase. Rheological percolation occurred preferentially in blends containing FWCNT and FLG/FWCNT. Electrical conductivity was observed in all compositions, with higher electrical conductivity being noticed in hybrids.

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Section: Resultsmentioning

confidence: 78%

Hybrids nanocomposites based on a polymer blend (linear low‐density polyethylene/poly(ethylene‐co‐methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube)

et al. 2020

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“…Each has its advantages and disadvantages discussed in the literature in details [4]. Some researchers reported other methods as well [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Water-Assisted Production of Polypropylene/Boehmite Composites

Lendvai

2020

Period. Polytech. Mech. Eng.

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In this study polypropylene (PP) matrix-based boehmite alumina (BA) reinforced composites were prepared batchwise in an internal mixer. BA particles up to 10 wt.% were incorporated by 1. traditional melt mixing and 2. in a novel, Water-Assisted (WA) way, called fast evaporation mixing, during which BA was dispersed in PP with the use of an aqueous carrier medium. The WA way with pure water as medium proved to be ineffective because of the presence of the Leidenfrost effect. Therefore, an additional agent, carboxymethyl cellulose (CMC) was used to increase the boiling temperature of the water. Mechanical, morphological and thermal properties of the composites were determined. Scanning electron microscopy images revealed a partially dispersed structure of BA within the PP matrix in all cases, where aggregates and dispersed particles were identified as well. The size of the agglomerates observed was the smallest when BA was incorporated by being dispersed in water/CMC firstly. The mechanical tests results indicated that the reinforcing effect of BA was also most prominent in this case. However, CMC had an opposite effect on PP, than BA thus reducing the overall enhancement in mechanical properties. Differential scanning calorimetry showed an increase in the crystallinity ratio of PP with increasing BA content, which indicates a nucleating effect of BA.

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The Effect of Filler Orientation and Distribution on the Electrical and Mechanical Properties of Graphene Based Polymer Nanocomposites

Cited by 2 publications

References 34 publications

Hybrids nanocomposites based on a polymer blend (linear low‐density polyethylene/poly(ethylene‐co‐methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube)

Hybrids nanocomposites based on a polymer blend (linear low‐density polyethylene/poly(ethylene‐co‐methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube)

Water-Assisted Production of Polypropylene/Boehmite Composites

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