Fabrication and characterization of well-dispersed single-walled carbon nanotube/polyaniline composites

Li, Xiaohong; Wu, Bin; Huang, Jier; Zhang, Jin; Liu, Zhongfan; Li, Hu‐Lin

doi:10.1016/s0008-6223(03)00124-6

Cited by 65 publications

(34 citation statements)

References 28 publications

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“…The results showed that the tensile strength and ultimate strain of the composites were increased by 20% and 70%, respectively. Li et al [46] reported the fabrication and characterization of SWNT/PANI composites by in situ polymerization of an aniline solution containing different SWNT contents. Electron microscopy and conductive analysis showed that they had uniform CNT dispersion and high electric conductivity.…”

Section: Preparation Of Cnt/polymer Compositesmentioning

confidence: 99%

The present status and key problems of carbon nanotube based polymer composites

Du¹,

Bai²,

Cheng³

2007

Express Polym. Lett.

414

250

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Abstract. The state-of-art and key problems of carbon nanotube (CNT) based polymer composites (CNT/polymer composites) including CNT/polymer structural composites and CNT/polymer functional composites are reviewed. Based on the results reported up to now, CNTs can be an effective reinforcement for polymer matrices, and the tensile strength and elastic modulus of CNT/polymer composites can reach as high as 3600 MPa and 80 GPa, respectively. CNT/polymer composites are also promising functional composite materials with improved electrical and thermal conductivity, etc. Due to their multi-functional properties, CNT/polymer composites are expected to be used as low weight structural materials, optical devices, thermal interface materials, electric components, electromagnetic absorption materials, etc. However, the full potential of CNT/polymer composites still remains to be realized. A few key problems, such as how to prepare structurecontrollable CNTs with high purity and consistently dependable high performance, how to break up entangled or bundled CNTs and then uniformly disperse and align them within a polymer matrix, how to improve the load transfer from matrix to CNT reinforcement, etc, still exist and need to be solved in order to realize the wide applications of these advanced composites.

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Section: Preparation Of Cnt/polymer Compositesmentioning

confidence: 99%

The present status and key problems of carbon nanotube based polymer composites

Du¹,

Bai²,

Cheng³

2007

Express Polym. Lett.

414

250

View full text Add to dashboard Cite

show abstract

“…But most of them have given stress on different types of preparation technique and characterization of the composites. But very few of them describe the systematic study of temperature variation of electrical conductivity and also the magnetic field dependence of electrical conductivity [36][37][38][39][40][41][42]. Sahoo et al [39] studied the room temperature conductivity of the PPy-MWCNT composites and concluded that the conductivity of the composites was increased by one order of magnitude than pure polypyrrole.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, electrical and magnetotransport properties of polypyrrole-MWCNT nanocomposite

Chakraborty

Gupta

Meikap

et al. 2012

Solid State Communications

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The present work describes the preparation of nanocomposites in which the multiwall carbon nanotubes (MWCNT) have been mixed with conducting polypyrrole (PPy) via an in situ chemical oxidative preparation method. To reveal their structural, morphological and thermal properties, the composites have been characterized by x-ray diffraction, field emission scanning electron microscope, Fourier transform infrared, thermogravimetric analysis respectively. Electrical transport and magnetotransport properties have been investigated in the temperature range 77-300K in presence as well as in absence of magnetic field up to 1Tesla. The conductivities of the composites are greater than that of pure polypyrrole. All the investigated samples follow Mott's variable range hopping (VRH) theory whereas the magnetic field dependent conductivity have been explained in terms of two opposite but simultaneously acting hopping effect-wave function shrinkage and forward interference effect.

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“…To quantify this phenomenon, ten solutions of SWNTs dispersed in increasing concentrations of PSS (0.1-1.0% by weight) are prepared. Using a UV-Vis spectrophotometer with 10-mm light path cuvettes, absorption spectroscopy is employed to measure the amount of light (wavelength between 300 and 900 nm) absorbed by the SWNT-PSS solutions (Li et al, 2003). It has been demonstrated that greater nanotube suspension is directly associated with an increase in the UV-Vis resonance peaks as well as the non resonant background, thus suggesting no preferential dispersion of any particular nanotube (Tan and Resasco, 2005).…”

mentioning

confidence: 99%

Tailoring Piezoresistive Sensitivity of Multilayer Carbon Nanotube Composite Strain Sensors

Loh

Lynch

Shim

et al. 2007

Journal of Intelligent Material Systems and Structures

157

131

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In recent years, carbon nanotubes have been utilized for a variety of applications, including nanoelectronics and various types of sensors. In particular, researchers have sought to take advantage of the superior electrical properties of carbon nanotubes for fabricating novel strain sensors. This article presents a single-walled carbon nanotube (SWNT)-polyelectrolyte (PE) composite thin film strain sensor fabricated with a layerby-layer (LbL) process. Optimization of bulk SWNT-PE strain sensor properties is achieved by varying various LbL fabrication parameters, followed by characterization of strain-sensing electromechanical responses. A resistor and capacitor (RC)-circuit model is proposed and validated with electrical impedance spectroscopy to fit experimental results and to identify equivalent circuit element parameters sensitive to strain. Experimental results suggest consistent trends between SWNT and PE concentrations to strain sensor sensitivities. Simply by adjusting the weight fraction of SWNT solutions and film thickness, strain sensitivities between 0.1 and 1.8 have been achieved. While SWNT-PE strain sensitivity is lower than some metal-foil strain gauges ($2), the LbL method allows for precise tailoring of the properties (i.e., strain sensitivity, resistivity, among others) of a high-capacity (AE10,000 mm m À1 ) homogeneous multilayer strain sensor.

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Fabrication and characterization of well-dispersed single-walled carbon nanotube/polyaniline composites

Cited by 65 publications

References 28 publications

The present status and key problems of carbon nanotube based polymer composites

The present status and key problems of carbon nanotube based polymer composites

Synthesis, electrical and magnetotransport properties of polypyrrole-MWCNT nanocomposite

Tailoring Piezoresistive Sensitivity of Multilayer Carbon Nanotube Composite Strain Sensors

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