Electrical conductivity of a single electrospun fiber of poly(methyl methacrylate) and multiwalled carbon nanotube nanocomposite

Sundaray, Bibekananda; Subramanian, V.; Natarajan, T. S.; Krishnamurthy, K.

doi:10.1063/1.2193462

Cited by 124 publications

(94 citation statements)

References 21 publications

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“…4). Even lower p c values have been reported in PMMA/CNT systems prepared by other procedures like in-situ polymerization [8], solution casting [7,12,[20][21][22][23] and others [27][28][29], without being able to make a direct comparison of these values since the aspect ratios of the nanotubes is not similar (in most of the cases they were in the range of 1000).…”

Section: Electrical Propertiesmentioning

confidence: 86%

“…Literature survey in conducting PMMA/CNT systems reveals several works prepared by the common methods of solution mixing/casting [7][8][9]11,12,[20][21][22][23][24] and in-situ polymerization [8,9,25], and a limited number of studies where other more sophisticated techniques were employed (coagulation [26,27], electrospinning [28], latex technology 3 [29], combination of solvent casting and melt mixing [30]). Surprisingly, there are only few works in systems prepared by melt mixing, even though this method has been widely applied in other thermoplastic matrices, since it offers several advantages such as speed, simplicity, low cost, absence of solvents and availability of the required equipment in the plastic industry.…”

Section: Pmma/cnt Composites Can Found Application As Electromagneticmentioning

confidence: 99%

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Highly conducting poly(methyl methacrylate)/carbon nanotubes composites: Investigation on their thermal, dynamic-mechanical, electrical and dielectric properties

Logakis

Pandis

Pissis

et al. 2011

Composites Science and Technology

152

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To cite this version:E. Logakis, Ch. Pandis, P. Pissis, J. Pionteck, P. Pötschke. Highly conducting poly(methyl methacrylate) / carbon nanotubes composites: Investigation on their thermal, dynamic-mechanical, electrical and dielectric properties. Composites Science and Technology, Elsevier, 2011, 71 (6) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractNanocomposites of poly(methyl methacrylate) (PMMA) containing various multi-walled carbon nanotubes (MWCNT) contents were prepared using melt mixing. Several techniques were employed to study the influence of the MWCNT addition on the thermal, mechanical, electrical and dielectric properties of the PMMA matrix. The electrical percolation threshold (p c ) was found to be 0.5 vol.% by performing AC and DC conductivity measurements. Significantly high conductivity levels (σ dc ) were achieved: σ dc exceeds 10 -2 S/cm already at 1.1 vol.%, the criterion for EMI shielding (σ dc > 10 -1 S/cm) is fulfilled at 2.9 vol.%, and the highest loaded sample (5.2 vol.%) gave a maximum value of 0.5 S/cm. Dielectric relaxation spectroscopy measurements in broad frequency (10 -1 −10 6 Hz) and temperature ranges (-150 to 170 ºC) indicated weak polymer-filler interactions, in consistency with differential scanning calorimetry and dynamic mechanical analysis findings. Weak polymer-filler interactions and absence of crystallinity facilitate the achievement of high conductivity levels in the nanocomposites.

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Section: Electrical Propertiesmentioning

confidence: 86%

Section: Pmma/cnt Composites Can Found Application As Electromagneticmentioning

confidence: 99%

Highly conducting poly(methyl methacrylate)/carbon nanotubes composites: Investigation on their thermal, dynamic-mechanical, electrical and dielectric properties

Logakis

Pandis

Pissis

et al. 2011

Composites Science and Technology

152

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show abstract

“…Each sample frame was collected during 5 s. Small changes in volume fraction of conductive particle cause high changes on electrical conductivity, characterizing its percolation curve. The range between 0.1-10 S/cm was previously related for semiconductor composites of CNT dispersions in PMMA matrix [25][26][27] . In order to determine the critical percolation threshold on electrical conductivity, it was applied the power law relationship, according to the classical model of percolation theory, described in Equation 1.…”

Section: Small-angle X-ray Scatteringmentioning

confidence: 99%

Electrical percolation, morphological and dispersion properties of MWCNT/PMMA nanocomposites

et al. 2014

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Nanocomposites of poly (methyl methacrylate) (PMMA) and carbon nanotubes have a high potential for applications where conductivity and low specific weight are required. This piece of work concerns investigations of the level of dispersion and morphology on the electrical properties of in situ polymerized nanocomposites in different concentrations of multi-walled carbon nanotubes (MWCNT) in a PMMA matrix. The electrical conductivity was measured by the four point probe. The morphology and dispersion was analyzed by Transmission Electron Microscopy (TEM) and Small Angle X-ray Scattering (SAXS). The correlation between electrical conductivity and the MWCNT amount, presented a typical percolation behavior, whose electrical percolation threshold determined by power law relationship was 0.2 vol. (%) The exponent t from the percolation power law indicated the formation of a 3D network of randomly arranged MWCNT. SAXS detected that the structures are intermediate to disks or spheres indicating fractal geometry for the MWCNT aggregates instead of isolated rods. HR-TEM images allowed us to observe the MWCNT individually dispersed into the matrix, revealing their distribution without preferential space orientation and absence of significant damage to the walls. The combined results of SAXS and HR-TEM suggest that MWCNT into the polymeric matrix might present interconnected aggregates and some dispersed single structures.

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“…Sundaray and co-workers [117] described the electrical conductivity of single electrospun MWNT/PMMA composite nanofibres. Alignment of MWNTs in the direction of the fibre axis was confirmed by bright field TEM images.…”

Section: F Electric and Thermal Propertiesmentioning

confidence: 99%

Carbon Nanotubes Reinforced Electrospun Polymer Nanofibres

Naebe¹,

Lin²,

Wang³

2010

Nanofibers

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Electrical conductivity of a single electrospun fiber of poly(methyl methacrylate) and multiwalled carbon nanotube nanocomposite

Cited by 124 publications

References 21 publications

Highly conducting poly(methyl methacrylate)/carbon nanotubes composites: Investigation on their thermal, dynamic-mechanical, electrical and dielectric properties

Highly conducting poly(methyl methacrylate)/carbon nanotubes composites: Investigation on their thermal, dynamic-mechanical, electrical and dielectric properties

Electrical percolation, morphological and dispersion properties of MWCNT/PMMA nanocomposites

Carbon Nanotubes Reinforced Electrospun Polymer Nanofibres

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