Preparation and Characterization of Aluminium Nanocomposites Based on MWCNT

2014 ◽  
Vol 550 ◽  
pp. 30-38
Author(s):  
S. Sivananthan ◽  
S. Gnanasekaran ◽  
Jerold Samuel C. Samson
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Metal Matrix ◽  
High Strength ◽  
Light Weight ◽  
Matrix Composites ◽  
Wide Range ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Metal Matrix Composites (MMC) has wide range of engineering applications such as high strength, temperature, stiffness, yield strength and modulus of rigidity. Among the metals, aluminium is widely used due to its light weight. However, the electrical conductivity of aluminium is low when compared with copper. This paper deals with the development of aluminium nanocomposites based on Multi Walled Carbon Nanotubes (MWCNT) in order to enhance the electrical resistivity of aluminium. Morphology and electrical properties of the nanocomposites has been analyzed and compared with aluminium.

Nickel Electrodeposition on Electrophoretically Deposited Carbon Nanotube Films

2009 ◽  
Vol 412 ◽  
pp. 87-92 ◽  
Author(s):  
Maria Federica De Riccardis ◽  
Daniela Carbone ◽  
Virginia Martina ◽  
Marilena Re ◽  
De Cheng Meng ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Stainless Steel ◽  
Thermal Properties ◽  
Metal Matrix ◽  
Mechanical And Thermal Properties ◽  
Matrix Composites ◽  
Nickel Electrodeposition ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Steel Substrates

Multi-walled carbon nanotubes (CNTs) were deposited by electrophoretic deposition on stainless steel substrates forming homogeneous porous CNT deposits. These CNT structures were then coated with a thin layer of Ni by electrodeposition. SEM and TEM observations confirmed that the Ni layer covered uniformly the CNT surfaces. This Ni coating treatment could facilitate the dispersion of CNTs in metal matrix composites leading to improved mechanical and thermal properties.

scholarly journals A New Method for Dispersing Pristine Carbon Nanotubes Using Regularly Arranged S-Layer Proteins

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1346
Author(s):  
Andreas Breitwieser ◽  
Uwe B. Sleytr ◽  
Dietmar Pum
Keyword(s):  
Carbon Nanotubes ◽  
Covalent Modification ◽  
Silica Layer ◽  
Medical Sciences ◽  
Lysinibacillus Sphaericus ◽  
Wide Range ◽  
Catalytic Sites ◽  
Multi Walled Carbon Nanotubes ◽  
Pristine Mwnts ◽  
Walled Carbon Nanotubes

Homogeneous and stable dispersions of functionalized carbon nanotubes (CNTs) in aqueous solutions are imperative for a wide range of applications, especially in life and medical sciences. Various covalent and non-covalent approaches were published to separate the bundles into individual tubes. In this context, this work demonstrates the non-covalent modification and dispersion of pristine multi-walled carbon nanotubes (MWNTs) using two S-layer proteins, namely, SbpA from Lysinibacillus sphaericus CCM2177 and SbsB from Geobacillus stearothermophilus PV72/p2. Both the S-layer proteins coated the MWNTs completely. Furthermore, it was shown that SbpA can form caps at the ends of MWNTs. Reassembly experiments involving a mixture of both S-layer proteins in the same solution showed that the MWNTs were primarily coated with SbsB, whereas SbpA formed self-assembled layers. The dispersibility of the pristine nanotubes coated with SbpA was determined by zeta potential measurements (−24.4 +/− 0.6 mV, pH = 7). Finally, the SbpA-coated MWNTs were silicified with tetramethoxysilane (TMOS) using a mild biogenic approach. As expected, the thickness of the silica layer could be controlled by the reaction time and was 6.3 +/− 1.25 nm after 5 min and 25.0 +/− 5.9 nm after 15 min. Since S-layer proteins have already demonstrated their capability to bind (bio)molecules in dense packing or to act as catalytic sites in biomineralization processes, the successful coating of pristine MWNTs has great potential in the development of new materials, such as biosensor architectures.

scholarly journals Enhancement of Electrical Conductivity of Aluminum-Based Nanocomposite Produced by Spark Plasma Sintering

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1150
Author(s):  
Nicolás A. Ulloa-Castillo ◽  
Roberto Hernández-Maya ◽  
Jorge Islas-Urbano ◽  
Oscar Martínez-Romero ◽  
Emmanuel Segura-Cárdenas ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Spark Plasma Sintering ◽  
Experimental Tests ◽  
Powder Morphology ◽  
Plasma Sintering ◽  
Multi Walled Carbon Nanotubes ◽  
Spark Plasma ◽  
Ball Milling Technique ◽  
Walled Carbon Nanotubes

This article focuses on exploring how the electrical conductivity and densification properties of metallic samples made from aluminum (Al) powders reinforced with 0.5 wt % concentration of multi-walled carbon nanotubes (MWCNTs) and consolidated through spark plasma sintering (SPS) process are affected by the carbon nanotubes dispersion and the Al particles morphology. Experimental characterization tests performed by scanning electron microscopy (SEM) and by energy dispersive spectroscopy (EDS) show that the MWCNTs were uniformly ball-milled and dispersed in the Al surface particles, and undesirable phases were not observed in X-ray diffraction measurements. Furthermore, high densification parts and an improvement of about 40% in the electrical conductivity values were confirmed via experimental tests performed on the produced sintered samples. These results elucidate that modifying the powder morphology using the ball-milling technique to bond carbon nanotubes into the Al surface particles aids the ability to obtain highly dense parts with increasing electrical conductivity properties.

Electron Microscopy Characterization of Platinum Catalysts Supported on Multi-walled Carbon Nanotubes

2012 ◽  
Vol 18 (S2) ◽  
pp. 1316-1317
Author(s):  
M.J. Guinel ◽  
N. Brodusch ◽  
R. Gauvin ◽  
Y. Verde-Gomez ◽  
B. Escobar-Morales
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Platinum Catalysts ◽  
Multi Walled Carbon Nanotubes ◽  
Microscopy Characterization ◽  
Walled Carbon Nanotubes

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

Surface and structural characterization of multi-walled carbon nanotubes following different oxidative treatments

Carbon ◽  
2011 ◽  
Vol 49 (1) ◽  
pp. 24-36 ◽  
Author(s):  
Kevin A. Wepasnick ◽  
Billy A. Smith ◽  
Kaitlin E. Schrote ◽  
Hannah K. Wilson ◽  
Stephen R. Diegelmann ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Structural Characterization ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes
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