scholarly journals Engineered Carbon-Nanotubes-Based Composite Material for RF Applications

2012 ◽  
Vol 54 (1) ◽  
pp. 52-59 ◽  
Author(s):  
Emmanuel Decrossas ◽  
Mahmoud A. El Sabbagh ◽  
Samir M. El-Ghazaly ◽  
Victor Fouad Hanna
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
Rf Applications

Effect of Expanded Temperature on Microstructure of Carbon Nanotubes/Expanded Graphite Composites

2013 ◽  
Vol 716 ◽  
pp. 373-378
Author(s):  
Qian Zhang ◽  
Xin Bao Gao ◽  
Tian Peng Li
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
High Temperature ◽  
Carbon Nanotube ◽  
Physical Adsorption ◽  
Expanded Graphite ◽  
Graphite Flake ◽  
Graphite Composite ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Carbon nanotube/expanded graphite composite material was prepared by expanding the mixture of multi-walled carbon nanotubes and expansible graphite under the condition of high temperature. The microstructure and composition was studied by using SEM and XRD. The study shows that the tubular structure of carbon nanotubes in the composite material is changed by high temperature expanding process, and the microstructure is different with different expanding temperature. When the expanding temperature was 900°C, carbon nanotubes transformed, then attached to the surface of expanded graphite flake, so carbon nanotubes and expanding graphite combined strongly; globular carbon nanotubes attached to the surface of expanded graphite flake at the temperature of 700°C, both were combined much more strongly; carbon nanotubes retained the tube structure at the temperature of 500°C, combination was looser due to the simple physical adsorption. The result shows that the choice of expanding temperature has an important effect on microstructure of carbon nanotube/expanded graphite composite material.

Chemically Coupled Cobalt Oxide Nanosheets Decorated onto the Surface of Multiwall Carbon Nanotubes for Favorable Oxygen Evolution Reaction

2021 ◽  
Vol 21 (4) ◽  
pp. 2660-2667
Author(s):  
Abdul Qayoom Mugheri ◽  
Aneela Tahira ◽  
Umair Aftab ◽  
Adeel Liaquat Bhatti ◽  
Ramesh Lal ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrochemical Impedance ◽  
Multiwall Carbon Nanotubes ◽  
Alkaline Media ◽  
Transfer Resistance ◽  
Multiwall Carbon

Cobalt oxide has been widely investigated among potential transition metal oxides for the electrochemical energy conversion, storage, and water splitting. However, they have inherently low electronic conductivity and high corrosive nature in alkaline media. Herein, we propose a promising and facile approach to improve the conductivity and charge transport of cobalt oxide Co3O4 through chemical coupling with well-dispersed multiwall carbon nanotubes (MWCNTs) during hydrothermal treatment. The morphology of prepared composite material consisting of nanosheets which are anchored on the MWCNTs as confirmed by scanning electron microscopy (SEM). A cubic crystalline system is exhibited by the cobalt oxide as confirmed by the X-ray diffraction study. The Co, O, and C are the only elements present in the composite material. FTIR study has indicated the successful coupling of cobalt oxide with MWCNTs. The chemically coupled cobalt oxide onto the surface of MWCNTs composite is found highly active towards oxygen evolution reaction (OER) with a low onset potential 1.44 V versus RHE, low overpotential 262 mV at 10 mAcm-2 and small Tafel slope 81 mV dec-1. For continuous operation of 40 hours during durability test, no decay in activity was recorded. Electrochemical impedance study further revealed a low charge transfer resistance of 70.64 Ohms for the composite material during the electrochemical reaction and which strongly favored OER kinetics. This work provides a simple, low cost, and smartly designing electrocatalysts via hydrothermal reaction for the catalysis and energy storage applications.

The Real-Time Detecting Application of CNTs in 3D Braided Composite Material

2011 ◽  
Vol 301-303 ◽  
pp. 99-103
Author(s):  
Jian Min Guo
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
Real Time ◽  
Stress And Strain ◽  
The Real ◽  
Braided Composite

This paper pay attention to the Carbon Nanotubes Threads (CNTs) in the 3D Braided Composite Material . CNTs as a piezoelectricity sensor, can be braided in the 3D Braided Composite Material. The resistance of the sensor will be changed with the correspondent stress and strain on the 3D Braided Composite Material. The resistance of the Carbon Nanotubes Threads can be detected by computer. So, the stress and strain on the 3D Braided Composite Material can be obtained betimes.

Mechanical Properties of Plastics Reinforced With Carbon Nanotubes

2006 ◽  
Author(s):  
Aleksandr R. Podgaets ◽  
Wubbo J. Ockels ◽  
Yuriy V. Sokolkin
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Composite Material ◽  
Polystyrene Film ◽  
Inverse Boundary ◽  
Plastic Composites ◽  
Elastic Tensor ◽  
Multi Level ◽  
Inverse Boundary Problem ◽  
Theoretical Results

This paper describes the first steps in the area of prediction mechanical properties of nanotubes-plastic composites. Multi-level approach is used in order to take into account all the known data about all levels of composite material. Effective (macroscopic) mechanical properties are produced from solution of inverse boundary problem of continuum medium mechanics with coordinate-dependent elastic tensor. Theoretical results are compared with known experiment [1] on reinforcing polystyrene film.

Properties of a composite material based on multi-walled carbon nanotubes and an ionic liquid

2014 ◽  
Vol 56 (3) ◽  
pp. 572-579 ◽  
Author(s):  
A. V. Bazhenov ◽  
T. N. Fursova ◽  
A. N. Turanov ◽  
A. S. Aronin ◽  
V. K. Karandashev
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
Ionic Liquid ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes
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