Fabrication of nanoscale to macroscale nickel-multiwall carbon nanotube hybrid materials with tunable material properties

Abdalla, Ahmed M.; Majdi, Tahereh; Ghosh, Subir; Puri, Ishwar K.

doi:10.1088/2053-1591/3/12/125014

Cited by 15 publications

(16 citation statements)

References 31 publications

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“…We have previously presented a detailed phase and morphology analyses of Ni‐MWNTs . Figure a presents a TEM image of as prepared MWNTs.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The MWNTs are plated with nickel to produce Ni‐MWNTs through electroless deposition, as described by us elsewhere . Briefly, palladium is adsorped onto the surface of MWNTs during two treatment steps, first activating the MWNTs with stannous chloride solution and then catalyzing the surface of MWNTs with palladium chloride solution . Then, nickel ions (Ni +2 ) are reduced to nickel metal on the catalyzed surface through the electrons provided by the reducing agent (sodium hypophosphite, NaH 2 PO 2 ) .…”

Section: Methodsmentioning

confidence: 99%

“…The MWNTs are plated with Ni for a Ni:MWNT weight ratio, γ = 7. A gram of MWNTs requires a plating solution that consists of NiCl 2 (11.9 g), NiSO 4 ·6H 2 O (7.7 g), NH 4 Cl (38.5 g), Na 3 C 6 H 5 O 7 ·2H 2 O (28 g), NaH 2 PO 2 ·H 2 O (35 g) and deionized water (700 mL) .…”

Section: Methodsmentioning

confidence: 99%

“…Here, we demonstrate a method to readily disperse and align commercially available MWNTs in an industrial grade epoxy. The entire surface of the MWNTs is coated with a nickel layer through nondestructive electroless plating . The resulting Ni‐MWNTs are magnetic and contain a low energy metallic layer that improves their interfacial adhesion to the bulk epoxy, which results in better dispersion and stability within the matrix than MWNTs that are intrinsically hydrophobic.…”

Section: Introductionmentioning

confidence: 99%

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Tailoring the properties of a polymer nanocomposite with a magnetic field

2018

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The properties of nanocomposites can be tailored by organizing nanoparticles within the polymer matrix, that is, for potential aerospace, automobile, and infrastructure applications. Multiwalled carbon nanotubes are coated with nickel to produce hybrid Ni‐MWNT nanoparticles. These magnetized nanoparticles are introduced into an epoxy matrix at a relatively low 0.25%–1% volume fraction and oriented along particular directions with an external magnetic field . Changing this alignment makes it possible to tailor the properties of the resulting composite material, that is, its tensile strength, microscopic elastic modulus, and electrical resistivity. The alignment imparts anisotropic properties to the bulk material, but when the nanoparticles are aligned in perpendicular directions in two sequential layers, this coupled orientation produces an overall isotropic composite material. The tensile strength of a nanocomposite containing 0.25 vol% of aligned Ni‐MWNT nanoparticles is ∼9% higher than of pure epoxy. Its AC electrical resistivity along the alignment direction is reduced by ∼20% in comparison with an epoxy composite containing a similar volume fraction of randomly dispersed nanoparticles. These outcomes reveal that, even at a relatively low nanoparticle volume fraction, the alignment of Ni‐MWNTs in epoxy with an external magnetic field induces property anisotropy, which can be tuned through multidirectional alignment. POLYM. COMPOS., 40:779–788, 2019. © 2018 Society of Plastics Engineers

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“…We have previously presented a detailed phase and morphology analyses of Ni‐MWNTs . Figure a presents a TEM image of as prepared MWNTs.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%