Designing of multiwalled carbon nanotubes reinforced low density polyethylene nanocomposites for suppression of electromagnetic radiation

Singh, Bhanu Pratap; Prabha, Vikram; Saini, Parveen; Gupta, Tejendra K.; Garg, Pardeep; Kumar, Gaurav; Pande, Indresh; Pande, Shailaja; Seth, R. K.; Dhawan, S. K.; Mathur, R.B.

doi:10.1007/s11051-011-0619-1

Cited by 107 publications

(55 citation statements)

References 21 publications

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“…In Equation (4) "d" is the thickness of the shield and "d" is the skin depth. The skin depth which can be described as the distance d over which the amplitude of a travelling plane wave decreases by a factor of e À1 and can be expressed as [49,50].…”

Section: Electromagnetic Interference Shielding Effectivenessmentioning

confidence: 99%

Superior mechanical and electrical properties of multiwall carbon nanotube reinforced acrylonitrile butadiene styrene high performance composites

Sharma

Basu

Singh

et al. 2015

Composites Part B: Engineering

140

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Section: Electromagnetic Interference Shielding Effectivenessmentioning

confidence: 99%

Superior mechanical and electrical properties of multiwall carbon nanotube reinforced acrylonitrile butadiene styrene high performance composites

Sharma

Basu

Singh

et al. 2015

Composites Part B: Engineering

140

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“…EMI shielding effectiveness can be expressed as 12,13 S E T (d B) = 10 log P T P I = 20 log E T E I = 20 log H T H I…”

confidence: 99%

Designing of epoxy composites reinforced with carbon nanotubes grown carbon fiber fabric for improved electromagnetic interference shielding

Singh¹,

Choudhary

Saini

et al. 2012

AIP Advances

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In this letter, we report preparation of strongly anchored multiwall carbon nanotubes (MWCNTs) carbon fiber (CF) fabric preforms. These preforms were reinforced in epoxy resin to make multi scale composites for microwave absorption in the X-band (8.2-12.4GHz). The incorporation of MWCNTs on the carbon fabric produced a significant enhancement in the electromagnetic interference shielding effectiveness (EMI-SE) from −29.4 dB for CF/epoxy-composite to −51.1 dB for CF-MWCNT/epoxy multiscale composites of 2 mm thickness. In addition to enhanced EMI-SE, interlaminar shear strength improved from 23 MPa for CF/epoxy-composites to 50 MPa for multiscale composites indicating their usefulness for making structurally strong microwave shields

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“…But its drawbacks are low flame-retardant efficiency and loading content, which decline mechanical properties of flame-retardant materials sharply [9][10][11][12][13]. Carbon nanotubes (CNTs) as nanofiller have attracted extensive attention for preparation of CNT/EVA nanocomposites owing to their unique properties such as low density, flexibility and high strength, high electrical and thermal conductivity [13][14][15][16]. Lately, there were some reports on using low-loading CNTs to reduce the flammability of polymeric materials [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Properties and characterization of ethylene-vinyl acetate filled with carbon nanotube

2015

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Ethylene-vinyl acetate (EVA) containing carbon nanotubes (CNTs) were prepared by melt blending. Morphological observation showed well dispersion of CNTs in EVA. Effect of CNTs on crystallization of EVA was studied by differential scanning calorimetry (DSC). The beginning and maximum crystallization temperatures for CNT/EVA composite resulted 10 and 5°C higher than pure EVA, respectively, showing high nucleation capability of CNTs in EVA matrix. The morphologies were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM), whereas, flammability properties were assessed by thermogravimetric analysis (TGA), natural burning and cone calorimetry. It was resulted that when nanodimensional material was not well dispersed, degradation products were not changed significantly. Unlike, CNT/EVA nanocomposites gave reasonably good reductions in peak heat release even when well nano-dispersed has not been obtained due to formation of low permeable char containing graphitic carbon. It was noticeable that CNT addition to EVA reduced surface cracks of chars which improved barrier resistance to evolution of flammable volatiles and oxygen access to condensed phase. The CNTs declined heat release rates and mass loss rate by 50-60 %, prolonged combustion time to two times in CNT/EVA samples. The TGA data also displayed that CNTs increased thermal degradation temperatures and final & Maziyar Sabet charred residues of CNT/EVA samples. The experimental observations from the torque, morphological evolution tests, and SEM resulted that CNTs are utilized for (1) increase of melt viscosity due to network structure formation of CNTs in the EVA matrix; (2) the enhancement of thermoxidation stability as a result of the CNTs' mechanical strength and integrity of the charred layers in the CNT/EVA nanocomposites; (3) the formation of compact charred layers promoted by CNTs acted as heat barrier and thermal insulation.

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Designing of multiwalled carbon nanotubes reinforced low density polyethylene nanocomposites for suppression of electromagnetic radiation

Cited by 107 publications

References 21 publications

Superior mechanical and electrical properties of multiwall carbon nanotube reinforced acrylonitrile butadiene styrene high performance composites

Superior mechanical and electrical properties of multiwall carbon nanotube reinforced acrylonitrile butadiene styrene high performance composites

Designing of epoxy composites reinforced with carbon nanotubes grown carbon fiber fabric for improved electromagnetic interference shielding

Properties and characterization of ethylene-vinyl acetate filled with carbon nanotube

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