The electrical properties of polymer nanocomposites with carbon nanotube fillers
TLDR
The electrical properties of polymer nanocomposites containing a small amount of carbon nanotube (CNT) are remarkably superior to those of conventional electronic composites, based on three-dimensional (3D) statistical percolation and 3D resistor network modeling.Abstract:
The electrical properties of polymer nanocomposites containing a small amount of carbon nanotube (CNT) are remarkably superior to those of conventional electronic composites. Based on three-dimensional (3D) statistical percolation and 3D resistor network modeling, the electrical properties of CNT nanocomposites, at and after percolation, were successfully predicted in this work. The numerical analysis was also extended to investigate the effects of the aspect ratio, the electrical conductivity, the aggregation and the shape of CNTs on the electrical properties of the nanocomposites. A simple empirical model was also established based on present numerical simulations to predict the electrical conductivity in several electronic composites with various fillers. This investigation further highlighted the importance of theoretical and numerical analyses in the exploration of basic physical phenomena, such as percolation and conductivity in novel nanocomposites.read more
Citations
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Investigation on sensitivity of a polymer/carbon nanotube composite strain sensor
Ning Hu,Yoshifumi Karube,Masahiro Arai,Tomonori Watanabe,Cheng Yan,Cheng Yan,Yuan Li,Yaolu Liu,Hisao Fukunaga +8 more
TL;DR: In this paper, an improved three-dimensional statistical resistor network model incorporating the tunneling effect between the neighbouring nanotubes, and a fiber reorientation model was used to understand the effects of processing parameters and material properties on sensor sensitivity in polymer/carbon nanotube composite sensors.
Journal ArticleDOI
Piezoresistive Strain Sensors Made from Carbon Nanotubes Based Polymer Nanocomposites
TL;DR: This article reviews the recent significant developments in the field of highly sensitive strain sensors made from CNT/polymer nanocomposites and focuses on the following two topics: electrical conductivity and piezoresistivity of CNT/.
Journal ArticleDOI
Recent advances in carbon-based polymer nanocomposites for electromagnetic interference shielding
TL;DR: In this article, a review of the recent advances in carbon-based polymer nanocomposites for electromagnetic interference (EMI) shielding is presented and related to structure and processing, focusing on the effects of nanoparticle aspect ratio and possible functionalization, dispersion and alignment during processing, as well as the use of nanohybrids and 3D reinforcements.
Journal ArticleDOI
Micromechanics modeling of the electrical conductivity of carbon nanotube (CNT)–polymer nanocomposites
Chuang Feng,Liying Jiang +1 more
TL;DR: In this paper, a mixed micromechanics model was developed to predict the overall electrical conductivity of carbon nanotube (CNT) polymer nanocomposites, where electron hopping and conductive networks were incorporated into the model by introducing an interphase layer and considering the effective aspect ratio of CNTs.
Journal ArticleDOI
Flexible Carbon Nanotube Films for High Performance Strain Sensors
Olfa Kanoun,Christian Müller,Abderahmane Benchirouf,Abdulkadir Sanli,Trong Nghia Dinh,Ammar Al-Hamry,Lei Bu,Carina Gerlach,Ayda Bouhamed +8 more
TL;DR: The insights about the relationship between film parameters and electromechanical properties can be used to improve the design and fabrication of CNT strain sensors.
References
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Book
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Dietrich Stauffer,Amnon Aharony +1 more
TL;DR: In this paper, a scaling solution for the Bethe lattice is proposed for cluster numbers and a scaling assumption for cluster number scaling assumptions for cluster radius and fractal dimension is proposed.
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Percolation and Conduction
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Ultra-low electrical percolation threshold in carbon-nanotube-epoxy composites
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Development of a dispersion process for carbon nanotubes in an epoxy matrix and the resulting electrical properties
Jan K.W. Sandler,Milo S. P. Shaffer,Torsten Prasse,Wolfgang Bauhofer,Karl Schulte,A. H. Windle +5 more
TL;DR: In this paper, untreated catalytically-grown carbon nanotubes were dispersed in an epoxy matrix and the electrical properties of the composite were measured in order to relate the filler volume fraction to the electrical conductivity.
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Excluded volume and its relation to the onset of percolation
Abstract: The general relationship between the percolation threshold of systems of various objects and the excluded volume associated with these objects is discussed. In particular, we derive the average excluded area and the average excluded volume associated with two- and three-dimensional randomly oriented objects. The results yield predictions for the dependencies, of the percolation critical concentration of various kinds of "sticks," on the stick aspect ratio and the anisotropy of the stick orientation distribution. Comparison of the present results with available Monte Carlo data shows that the percolation threshold of the sticks is described by the above dependencies. On the other hand, the numerical values of the excluded area and the excluded volume are not dimensional invariants as suggested in the literature, but rather depend on the randomness of the stick orientations. The usefulness of the present results for percolation-threshold problems in the continuum is discussed. In particular, it is shown that the excluded area and the excluded volume give the number of bonds per object ${B}_{c}$ when the objects are all the same size. In the case where there is a distribution of object sizes, the proper average of the excluded area or volume is a dimensional invariant while ${B}_{c}$ is not.