Electrical properties of single wall carbon nanotube reinforced polyimide composites

Ounaies, Zoubeida; Park, C.; Wise, Kristopher E.; Siochi, Emilie J.; Harrison, Joycelyn S.

doi:10.1016/s0266-3538(03)00067-8

Cited by 615 publications

(277 citation statements)

References 21 publications

Supporting

Mentioning

239

Contrasting

Unclassified

Order By: Relevance

“…Several authors [54,[76][77][78][79][80] have reported that the electrical properties of nanocomposites are governed by electron hopping or tunnelling. Experiments and models revealed that the electron tunnelling results in nonlinear current-voltage behaviour in nanocomposites [81,82]. The resistance between nanotubes is a combination of direct contact resistance and tunnelling resistance [83].…”

Section: (C) Equivalent Resistor Networkmentioning

confidence: 99%

Estimation of the physical properties of nanocomposites by finite-element discretization and Monte Carlo simulation

Spanos

Elsbernd

Ward

et al. 2013

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

This paper reviews and enhances numerical models for determining thermal, elastic and electrical properties of carbon nanotube-reinforced polymer composites. For the determination of the effective stress–strain curve and thermal conductivity of the composite material, finite-element analysis (FEA), in conjunction with the embedded fibre method (EFM), is used. Variable nanotube geometry, alignment and waviness are taken into account. First, a random morphology of a user-defined volume fraction of nanotubes is generated, and their properties are incorporated into the polymer matrix using the EFM. Next, incremental and iterative FEA approaches are used for the determination of the nonlinear properties of the nanocomposite. For the determination of the electrical properties, a spanning network identification algorithm is used. First, a realistic nanotube morphology is generated from input parameters defined by the user. The spanning network algorithm then determines the connectivity between nanotubes in a representative volume element. Then, interconnected nanotube networks are converted to equivalent resistor circuits. Finally, Kirchhoff's current law is used in conjunction with FEA to solve for the voltages and currents in the system and thus calculate the effective electrical conductivity of the nanocomposite. The model accounts for electrical transport mechanisms such as electron hopping and simultaneously calculates percolation probability, identifies the backbone and determines the effective conductivity. Monte Carlo analysis of 500 random microstructures is performed to capture the stochastic nature of the fibre generation and to derive statistically reliable results. The models are validated by comparison with various experimental datasets reported in the recent literature.

show abstract

Section: (C) Equivalent Resistor Networkmentioning

confidence: 99%

Estimation of the physical properties of nanocomposites by finite-element discretization and Monte Carlo simulation

Spanos

Elsbernd

Ward

et al. 2013

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

show abstract

“…The high degree of alignment for nanostructures with high aspect ratio can be understood within the framework of microhydrodynamics, in which the Péclet number, Pe, is estimated to be in the range of 10 3 to 10 6 ()1) for the lengths of nanostructures studied here 15,18 . Sequential etching and SEM imaging also show that the NTs are, like the NWs, located at the outer $60 nm of the BBFs, close to a two-dimensional layer, contrasting with NT composites made by solution casting or spin coating [19][20][21] , which usually contain randomly oriented NTs through the thickness of the films.…”

Section: Other Nanowire and Carbon Nanotube Bbfsmentioning

confidence: 99%

Nanowires and Carbon Nanotubes

Liu

2006

Scanning Microscopy for Nanotechnology

View full text Add to dashboard Cite

Many of the applications proposed for nanowires and carbon nanotubes require these components to be organized over large areas with controlled orientation and density. Although progress has been made with directed assembly and LangmuirBlodgett approaches, it is unclear whether these techniques can be scaled to large wafers and non-rigid substrates. Here, we describe a general and scalable approach for large-area, uniformly aligned and controlled-density nanowire and nanotube films, which involves expanding a bubble from a homogeneous suspension of these materials. The blown-bubble films were transferred to single-crystal wafers of at least 200 mm in diameter, flexible plastics sheets of dimensions of at least 225 3 300 mm 2 and highly curved surfaces, and were also suspended across open frames. In addition, electrical measurements show that large arrays of nanowire field-effect transistors can be efficiently fabricated on the wafer scale. Given the potential of blown film extrusion to produce continuous films with widths exceeding 1 m, we believe that our approach could allow the unique properties of nanowires and nanotubes to be exploited in applications requiring large areas and relatively modest device densities.Semiconductor nanowires (NWs) and carbon nanotubes (NTs) exhibit physical properties that make them attractive building blocks for many electronic and optical applications [1][2][3] . To realize such applications, researchers have directed considerable effort to the development of methods of assembly that might ultimately lead to integrated systems. For example, there have been studies of individual or small numbers of NW and NT devices prepared by random deposition, electric field directed assembly 4 , flowassisted alignment 5 , and selective chemical and biological patterning 6,7 , and up to centimetre-scale assembly of NWs using the Langmuir-Blodgett technique 8 . However, it is still unclear whether these methods can be extended to large-scale assembly of NWs and NTs on both rigid and flexible substrates with controlled alignment and density.Blown film extrusion is a well-developed process for the manufacture of plastic films in large quantities, which involves extruding a molten polymer and inflating it to obtain a balloon, which can be collapsed and slit to form continuous flat films with widths exceeding 1 m at rates in the order of 500 kg h 21 (refs. 9 -11). We have applied this basic idea for the first time to the formation of nanocomposite films where the density and orientation of the NWs and NTs are controlled within the film. The basic steps in our approach (Fig. 1a) consist of (i) preparation of a homogeneous, stable and controlled concentration polymer suspension of NWs or NTs, (ii) expansion of the polymer suspension using a circular die to form a bubble at controlled pressure, P, and expansion rate, where stable vertical expansion is achieved using an external vertical force, F, and (iii) transfer of the bubble film to substrates or open frame structures. BLOWN BUBBLE FILMSTo characte...

show abstract

“…Incorporation of nanofibers in ceramic matrix results in high toughness with superior failure properties (She et al 2000). The discovery of CNTs (Iijima 1991) has led to the fabrication of multifunctional ceramic composites possessing improved mechanical, thermal and electrical properties (Biercuk et al 2002;Ounaies et al 2003;Weisenberger et al 2003;Cho et al 2009). Applications of CNT-woven fibers into textiles have added new scope in the area of nanocomposites (Dalton et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Polymer and ceramic nanocomposites for aerospace applications

2017

View full text Add to dashboard Cite

This paper reviews the potential of polymer and ceramic matrix composites for aerospace/space vehicle applications. Special, unique and multifunctional properties arising due to the dispersion of nanoparticles in ceramic and metal matrix are briefly discussed followed by a classification of resulting aerospace applications. The paper presents polymer matrix composites comprising majority of aerospace applications in structures, coating, tribology, structural health monitoring, electromagnetic shielding and shape memory applications. The capabilities of the ceramic matrix nanocomposites to providing the electromagnetic shielding for aircrafts and better tribological properties to suit space environments are discussed. Structural health monitoring capability of ceramic matrix nanocomposite is also discussed. The properties of resulting nanocomposite material with its disadvantages like cost and processing difficulties are discussed. The paper concludes after the discussion of the possible future perspectives and challenges in implementation and further development of polymer and ceramic nanocomposite materials.

show abstract

Electrical properties of single wall carbon nanotube reinforced polyimide composites

Cited by 615 publications

References 21 publications

Estimation of the physical properties of nanocomposites by finite-element discretization and Monte Carlo simulation

Estimation of the physical properties of nanocomposites by finite-element discretization and Monte Carlo simulation

Nanowires and Carbon Nanotubes

Polymer and ceramic nanocomposites for aerospace applications

Contact Info

Product

Resources

About