Highly electrically conductive and high performance EMI shielding nanowire/polymer nanocomposites by miscible mixing and precipitation

Gelves, Genaro A.; Al‐Saleh, Mohammed H.; Sundararaj, Uttandaraman

doi:10.1039/c0jm02546a

Cited by 253 publications

(143 citation statements)

References 62 publications

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“…For instance, EMI shielding efficiency benefits with increasing electrical conductivity in foams, boosting their already intrinsic ability to absorb electromagnetic radiation [26]. Optimum nanoparticle distribution and dispersion is widely known to improve the transport properties of polymer-based nanocomposites.…”

Section: Electrical Conductivitymentioning

confidence: 99%

Graphene nanoplatelets-reinforced polyetherimide foams prepared by water vapor-induced phase separation

Abbasi¹,

Antunes²,

Velasco³

2015

Express Polym. Lett.

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Abstract. The present work considers the preparation of medium-density polyetherimide foams reinforced with variable amounts of graphene nanoplatelets (1-10 wt%) by means of water vapor-induced phase separation (WVIPS) and their characterization . A homogeneous closed-cell structure with cell sizes around 10 µm was obtained, with foams exhibiting zero crystallinity according to X-ray diffraction (XRD). Thermogravimetric analysis under nitrogen showed a two-step thermal decomposition behaviour for both unfilled and graphene-reinforced foams, with foams containing graphene presenting thermal stability improvements, related to a physical barrier effect promoted by the nanoplatelets. Thermo-mechanical analysis indicated that the specific storage modulus of the nanocomposite foams significantly increased owing to the high stiffness of graphene and finer cellular morphology of the foams. Although foamed nanocomposites displayed no further sign of graphene nanoplatelets exfoliation, the electrical conductivity of these foams was significant even for low graphene contents, with a tunnel-like model fitting well to the evolution of the electrical conductivity with the amount of graphene.

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Section: Electrical Conductivitymentioning

confidence: 99%

Graphene nanoplatelets-reinforced polyetherimide foams prepared by water vapor-induced phase separation

Abbasi¹,

Antunes²,

Velasco³

2015

Express Polym. Lett.

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“…Then, chopped CFs were subsequently deposited onto a molten polymer sublayer using a special fiber-feeding apparatus with brush screws under high intensity DC electric field at a field strength of about 3 kV/cm. The density of the formed aligned CF layer was about 25-30 g/m 2 . Ni powder was added to previously deposited CF using the vibrospreading apparatus.…”

Section: Preparation Of Samplesmentioning

confidence: 97%

“…Conductive polymer composites (CPCs) have been finding more and more industrial as well as strategic applications since the 1950s in the fields of electromagnetic interference (EMI) shielding [1][2][3], electrostatic discharge dissipation [4,5], pressure-sensing [6][7][8], selfheating [9,10] and electrode systems [11,12].…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of polyethylene composite films filled with nickel powder and short carbon fiber hybrid filler

Mironov¹,

Kim²,

Park³

2013

Carbon letters

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Effects of the amount of nickel powder (Ni) in Ni-carbon fiber (CF) hybrid filler systems on the conductivity(or resistivity) and thermal coefficient of resistance (TCR) of filled high density polyethylene were studied. Increases of the resistivity and TCR with increasing Ni concentration at a given hybrid filler content were observed. Using the fiber contact model, we showed that the main role of Ni in the hybrid filler system is to decrease the interfiber contact resistance when Ni concentration is less than the threshold point. The formation of structural defects leading to reduced reinforcing effect resulted in both a reduction of strength and an increase of the coefficient of thermal expansion in the composite film; these changes are responsible for the increases of both resistivity and TCR with increasing Ni concentration in the hybrid filler system.

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“…With respect to the electrical conductivity of PGNs, there are various influence factors covering not only the type of polymer matrix but the properties of the graphene nanosheets (GNSs), such as their concentration, dispersion, aspect ratio, orientation, etc. [43,44,77].…”

Section: Electrical Conductivity Of Pgnsmentioning

confidence: 98%

Graphene Nanocomposites for Electromagnetic Induction Shielding

Zhai

2015

Graphene-Based Polymer Nanocomposites in Electronics

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The unique properties of graphene, such as high specific surface area, aspect ratio and electrical conductivity, make it very promising to fabricate electromagnetic induction (EMI) shielding materials. In this chapter, we first made a brief introduction about the development of EMI shielding materials as well as the preparation of graphene and polymer/graphene nanocomposites (PGNs). Typical surface modification of graphene to optimize its dispersion within polymer matrix was reviewed later. After that, we presented critical factors for the EMI shielding effectiveness (SE) of PGNs in detail. Meanwhile, the EMI shielding mechanism was introduced associated with corresponding examples.

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Highly electrically conductive and high performance EMI shielding nanowire/polymer nanocomposites by miscible mixing and precipitation

Cited by 253 publications

References 62 publications

Graphene nanoplatelets-reinforced polyetherimide foams prepared by water vapor-induced phase separation

Graphene nanoplatelets-reinforced polyetherimide foams prepared by water vapor-induced phase separation

Electrical properties of polyethylene composite films filled with nickel powder and short carbon fiber hybrid filler

Graphene Nanocomposites for Electromagnetic Induction Shielding

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