Effect of Ball-Milling Parameter on the Synthesis of MWCNT/Alumina Hybrid Compound

2012 ◽  
Vol 620 ◽  
pp. 309-313 ◽  
Author(s):  
Norlin Nosbi ◽  
Md Akil Hazizan
Keyword(s):  
Carbon Nanotubes ◽  
Ball Milling ◽  
Particle Size Analysis ◽  
Methane Decomposition ◽  
Decomposition Process ◽  
Size Analysis ◽  
Hybrid Compound ◽  
X Ray ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The effects of ball-milling parameter on the structures and properties of the synthesis of multi-walled carbon nanotubes (MWCNT)/alumina hybrid compound via methane decomposition process using Ni-Alumina catalyst were researched. The structural evaluation of particles compound was investigated by particle size analysis, energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), FTIR spectrometer and scanning electron microscopy (SEM). The results indicated that with 300rpm 15h, the microstructure of the hybrid compound is greatly refined, and methane decomposition process distributed uniformly, thus increasing the efficiency of the carbon nanotubes growth process.

scholarly journals The investigation of multi-walled carbon nanotubes dispersion and its influence on rheological properties of cement systems

2018 ◽  
Vol 251 ◽  
pp. 01030
Author(s):  
Gintautas Skripkiunas ◽  
Grigory Yakovlev ◽  
Ekaterina Karpova
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Particle Size ◽  
Rheological Properties ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Cement Pastes ◽  
Multi Walled Carbon Nanotubes ◽  
Ph Level ◽  
Walled Carbon Nanotubes

The current research is devoted to the studying of multi-walled carbon nanotubes (MWCNT) dispersion and its influence on the rheological properties of cement pastes. The pH and electrical conductivity test, zeta potential measurements, particle size analysis were performed for characterization of MWCNT dispersion. The MWCNT dispersion were tested during 1 month and presented the decrease of pH level from 8.89 to 8.02, increase of electrical conductivity from 2.00 to 2.75 mS/cm. The particle size analysis did not reveal the significant changes during 1 month of storage. The rheological test of nanomodified cement pastes were performed for concentration of MWCNT dispersion in the range from 0 to 0.5% by weight of cement. The decrease of yield stress by 30.7% and increase of plastic viscosity by 29.6% were obtained for cement paste modified by MWCNT dispersion in dosage of 0.25% by weight of cement. The changes in flow behaviour were established for cement pastes tested in 5 min after mixing and were not observed for cement pastes tested after 120 min of mixing.

scholarly journals Tuning the length dispersion of multi-walled carbon nanotubes by ball milling

AIP Advances ◽  
2013 ◽  
Vol 3 (9) ◽  
pp. 092117 ◽  
Author(s):  
László Forró ◽  
Richard Gaal ◽  
Claudio Grimaldi ◽  
Marijana Mionić ◽  
Primož Rebernik Ribič ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ball Milling ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A Novel Method for Mixing Nanomaterials with Soil

2019 ◽  
Vol 25 ◽  
pp. 46-68 ◽  
Author(s):  
Ali Akbar Firoozi ◽  
Mohd Raihan Taha ◽  
Tanveer Ahmed Khan ◽  
Farzad Hejazi ◽  
Ali Asghar Firoozi ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Ball Milling ◽  
Milling Time ◽  
Mixing Time ◽  
Weight Ratio ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Concentration Data ◽  
X Ray ◽  
Electron Microscopy Analysis

Mixing of nano-sized powders with soils (macro-sized powders) is a noteworthy issue for geotechnical projects. Thus, this study examined the horizontal ball mill mixing of nano-copper oxide with kaolinite. Ball milling parameters (rotation speed, weight ratio of balls to powder and milling time) of the planetary ball milling were optimized for proper mixing of nano-copper oxide and kaolinite powder. Results showed that increase in mixing time decreased the agglomeration of nano-copper powders and kaolinite and increased the homogeneity of nano-copper powder with kaolinite particles. The quality of mixing was assessed through intensity and scale of segregation using concentration data obtained through energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analyses. It was observed through these two tests that, increase in ball milling time after 6 hours resulted in grain size reduction. Field emission scanning electron microscopy analysis showed that nano-coppers were regularly found on the surface of kaolinite particles after 6 hrs. of horizontal milling at 4:1 ratio of balls to powder mixture. Furthermore, 24 hrs. mixing resulted in grinding of kaolinite particles and hence their size was reduced. Particle size analysis confirmed these results, as the highest size span value of 3.417 was observed after 6 hrs. milling with speed of 200 rpm.

The Ball Milling with Various Rotation Speeds Assisted to Dispersion of the Multi-Walled Carbon Nanotubes

2012 ◽  
Vol 4 (1) ◽  
pp. 20-29 ◽  
Author(s):  
Sunchul Huh ◽  
Munkhbayar Batmunkh ◽  
Yeonggeun Kim ◽  
Hanshik Chung ◽  
Hyomin Jeong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ball Milling ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Synthesis and Characteristics of Hierarchical Nanostructure Fe3O4 Coated Multi-Walled Carbon Nanotubes

2014 ◽  
Vol 926-930 ◽  
pp. 258-261
Author(s):  
Jing Heng Deng ◽  
Kan Ping Yu ◽  
Jian Guo Xie
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Solvothermal Process ◽  
X Ray ◽  
Hierarchical Nanostructure ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

Hierarchical nanostructure Fe3O4/multi-walled carbon nanotubes (Fe3O4/MWCNTs) were prepared by solvothermal process using acid treated MWCNTs and iron acetylacetonate in ethylene glycol as reduction reagent. The materials were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET). The results showed that petal-like hierarchical Fe3O4 grew on MWCNTs and the Fe3O4 nanoparticles had diameters in the range of 55-110 nm. It was a facile approach to grow hierarchical nanoFe3O4.

PREPARATION AND MICROSTRUCTURE OF MCNT/Cu NANOCOMPOSITE

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1461-1466
Author(s):  
WANLI GU ◽  
WENBIN SHENG
Keyword(s):  
Carbon Nanotubes ◽  
Ball Milling ◽  
Fracture Process ◽  
Milled Powder ◽  
Milling Process ◽  
Nano Particles ◽  
Ball Milling Process ◽  
Structure Changes ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The fracture process and the structure changes of the multi-walled carbon nanotubes (MCNT) during the mechanical ball milling process were investigated and the samples of ball milled powder were observed by SEM. The results indicate that the MCNT turned into nano-whiskers or nano-particles during the ball milling process. The pre-milled MCNT could be distributed in Cu powders homogeneously. The bulk MCNT / Cu nanocomposite were fabricated by hot pressing the mixed MCNT / Cu powders at a temperature of 1073 K under a pressure of 20 MPa and the microstructure of the composites were investigated. It has been found that the multi-walled carbon nanotubes distributed in copper evenly.

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