Effect of Carbon Nanotube Functionalization on the Structure and Electrochemical Characteristics of Their Hybrid Nanocomposites with Polyaniline and Polypyrrole

The present study investigates the effect of the carboxylated multi-walled carbon nanotube (0~3 wt %) content on the electrical and thermal properties of high density polyethylene/carbon black/carboxylated multi-walled carbon nanotube (HDPE/CB/c-MWNT) hybrid nanocomposites. The room temperature electrical resistivity and positive temperature coefficient (PTC) intensity of the nanocomposites significantly improved with the addition of c-MWNT. However, the heat of fusion decreases as the amount of c-MWNT increases. Further, the microstructural parameters such as the fractional free volume (Fv) and free volume hole size (Vf) of the nanocomposites shows appreciable changes around the percolation threshold. Secondly, the PALS results seem to correlate well with the electrical and thermal properties of the composites.

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Investigation of the Crack Propagation Behavior of the Multiwalled Carbon Nanotube/Graphite/Natural Rubber Hybrid Nanocomposites Using Digital Image Correlation Technique

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2019.2675 ◽

2019 ◽

Vol 14 (12) ◽

pp. 1766-1770

Author(s):

Hasan Kasim ◽

Ahmad Naser Aldeen ◽

Yücel Can ◽

Murat Yazici

Keyword(s):

Electrical Conductivity ◽

Carbon Nanotube ◽

Digital Image Correlation ◽

Crack Propagation ◽

Natural Rubber ◽

Digital Image ◽

Multiwalled Carbon Nanotube ◽

Hybrid Nanocomposites ◽

Image Correlation ◽

Multiwalled Carbon

In the presented study, a hybrid Natural Rubber (NR) based semiconductive nanocomposites was examined to obtain better electrical and mechanical properties. The hybrid nanocomposite produced by incorporation of the Multiwalled Carbon Nanotube (MWCNT) and graphite nanoparticles into the NR. The conventional curing additives also included in the compound. A functionalized MWCNT (1, 2 and 3 phr's) with 3 phr graphite quotas were studied to produce the NR nanocomposites. The MWCNT/Graphite and NR mixed homogeneously to advance the interfacial interaction with the matrix. The graphite nano-particulates added to obtain 3D electrical connectivity network in the hybrid nanocomposites by becoming bridging points between multiwalled carbon nanotubes. Nanocomposites were produced as 3 mm sheets in a steel mold by vulcanizing at 165 °C for 10 min under pressure. The single-edge notched tension specimens were subjected to estimate crack propagation and electrical resistance relation. Digital Image Correlation (DIC) technique was used to observe the crack resistivity function. The results evaluated to clarify the relationship between crack length, MWCNT filler ratio, and electrical conductivity properties. MWCNTs are generally preferred as the reinforcements for their very high aspect ratio and excellent specific surface area properties. However, the electrical conductivity of the nanocomposites is owing to the constitution of a continuous conductive 3D network of MWCNT and Graphite in the NR matrix.

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Effect of nanomaterials in platinum-decorated carbon nanotube paste-based electrodes for amperometric glucose detection

Journal of Materials Research ◽

10.1557/jmr.2008.0177 ◽

2008 ◽

Vol 23 (5) ◽

pp. 1457-1465 ◽

Cited By ~ 4

Author(s):

Jining Xie ◽

Shouyan Wang ◽

L. Aryasomayajula ◽

V.K. Varadan

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Electrochemical Impedance ◽

Glucose Sensing ◽

Electrochemical Characteristics ◽

Current Response ◽

X Ray Diffraction ◽

Multiwalled Carbon ◽

Transmission Electron ◽

Wide Range

The effect of nanomaterials in platinum-decorated, multiwalled, carbon nanotube-based electrodes for amperometric glucose sensing was investigated by a comparative study with other carbon material-based electrodes such as graphite, glassy carbon, and multiwalled carbon nanotubes. Scanning and transmission electron microscopy and x-ray diffraction were used to investigate their morphologies and crystallinities. Electrochemical impedance spectroscopy was conducted to compare the electrochemical characteristics of these electrodes. The glucose-sensing results from the chronoamperometric measurements indicated that carbon nanotubes improve the linearity of the current response to glucose concentrations over a wide range, and that platinum decoration of the carbon nanotubes produces improved electrochemical performance with a higher sensitivity.

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Predicting effective electrical resistivity and conductivity of carbon nanotube/carbon black-filled polymer matrix hybrid nanocomposites

Journal of Physics and Chemistry of Solids ◽

10.1016/j.jpcs.2021.110444 ◽

2021 ◽

pp. 110444

Author(s):

M. Haghgoo ◽

R. Ansari ◽

M.K. Hassanzadeh-Aghdam

Keyword(s):

Electrical Resistivity ◽

Carbon Nanotube ◽

Carbon Black ◽

Polymer Matrix ◽

Hybrid Nanocomposites ◽

Filled Polymer

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Comparative Studies of Electrochemical Behaviors of Benzenediols at a Gold Nanoparticle/carbon Nanotube Composite Modified Glassy Carbon Electrode

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v14i3.108 ◽

2011 ◽

Vol 14 (3) ◽

pp. 183-189

Author(s):

Yong-Ping Dong ◽

Qian-Feng Zhang ◽

Taike Duan

Keyword(s):

Carbon Nanotube ◽

Gold Nanoparticle ◽

Glassy Carbon Electrode ◽

Modified Electrode ◽

Glassy Carbon ◽

Electrochemical Characteristics ◽

Carbon Electrode ◽

Modified Glassy Carbon Electrode ◽

Electrocatalytic Effect ◽

Carbon Nanotube Composite

A gold nanoparticle/carbon nanotube composite modified glassy carbon electrode was fabricated and used to investigate electrochemical characteristics of hydroquinone, catechol, and resorcinol via cyclic voltammetric analysis under neutral pH conditions. The results imply that the gold nanoparticle/carbon nanotbue modified electrode exhibited a synergistic and excellent electrocatalytic effect of gold nanoparticles and carbon nanotube on the redox behaviors of benzenediols. The reversibility of electrochemical reaction was improved greatly and the peak currents were increased significantly compared with a bare electrode. Good linear relationships were obtained between the oxidation peak currents and the concentrations of catechol and resorcinol. The electrochemical process of catechol was controlled by surface adsorption process, while that of resorcinol was controlled by diffusion process. However, the peak current and the concentration of hydroquinone were not proportional in the whole concentration range, which is because the controlling process of electrochemical reactions was different in the different hydroquinone concentration. Benzenediols could be detected simultaneously at the modified electrode but not at the bare electrode. The stability of the modified electrode was excellent in the benzenediols solutions, which made it possible for the practical application of the modified electrode.

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