scholarly journals TRIBOLOGICAL PERFORMANCE OF LITHIUM GREASE DISPERSED BY SILCA NANO PARTICLES AND CARBON NANOTUBES

2021 ◽  
Vol 18 (3) ◽  
pp. 23-34
Keyword(s):  
Carbon Nanotubes ◽  
Tribological Performance ◽  
Nano Particles ◽  
Lithium Grease

Tribological Behavior of Carbon Nanotubes as an Additive on Lithium Grease

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Alaa Mohamed ◽  
T. A. Osman ◽  
A. Khattab ◽  
M. Zaki
Keyword(s):  
Carbon Nanotubes ◽  
Arc Discharge ◽  
Average Diameter ◽  
Friction Reduction ◽  
Lithium Grease ◽  
X Ray ◽  
Transmission Electron ◽  
Boundary Film ◽  
Load Carrying ◽  
Worn Surface

Carbon nanotubes (CNTs) with 10 nm average diameter and 5 μm in length were synthesized by electric arc discharge. The morphology and structure of CNTs were characterized by high resolution transmission electron microscopy (HRTEM) and X-ray powder diffraction. The tribological properties of CNTs as an additive on lithium grease were evaluated with a four ball tester. The results show that the grease with CNTs exhibit good performance in antiwear (AW) and decrease the wear scare diameter (WSD) about 63%, decrease friction reduction about 81.5%, and increase the extreme pressure (EP) properties and load carrying capacity about 52% with only 1% wt. of CNTs added to lithium grease. The action mechanism was estimated through analysis of the worn surface with a scanning electron microscope (SEM) and energy dispersive X-ray (EDX). The results indicate that a boundary film mainly composed of CNTs, Cr, iron oxide, and other organic compounds was formed on the worn surface during the friction process.

Preparation of novel polyimide nanocomposites with high mechanical and tribological performance using covalent modified carbon nanotubes via Friedel-Crafts reaction

Polymer ◽  
2018 ◽  
Vol 150 ◽  
pp. 223-231 ◽  
Author(s):  
Chunying Min ◽  
Dengdeng Liu ◽  
Zengbao He ◽  
Songjun Li ◽  
Kan Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Tribological Performance ◽  
Modified Carbon Nanotubes

scholarly journals Methotrexate Detection Based On The Optical Properties Of Carbon Nanotubes And Silver Nano Particles Nanocomposites

2021 ◽  
Vol 7 (3) ◽  
pp. 1323
Author(s):  
Fida Mohammad Mohammadi
Keyword(s):  
Carbon Nanotubes ◽  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Nano Particles ◽  
Optical Measurements ◽  
Carbon Electrode ◽  
Linear Absorption Coefficient ◽  
Linear Absorption ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

<p>In this experiment, glassy carbon electrode with multi walled carbon nanotubes<br />nanocomposites have been prepared in different concentration in order to see if<br />methotrexate is anticancer drug. For the purpose of characterizing the structures,<br />nanocomposites were analyzed by scanning electron microscope. Optical measurements of different concentrations were conducted by z-scan method and the results show that by rising the concentration, nonlinear refractive index and linear absorption coefficient increases. The values of nonlinear refractive index are in orders of 𝟏𝟎−𝟖 𝒄𝒎𝟐 𝒘.</p>

Gold Nanoparticles Self-Assembling on Surfaces of Carbon Nanotubes Modified by Mercapto Groups

2012 ◽  
Vol 621 ◽  
pp. 107-110
Author(s):  
Yong Cheng Feng ◽  
Gui Lin Zhou
Keyword(s):  
Carbon Nanotubes ◽  
Nano Particles ◽  
Gold Nanowires ◽  
One Dimensional ◽  
Forming Mechanism ◽  
Mixed Acid ◽  
Self Assembling ◽  
Gold Nano Particles ◽  
Microelectronic Materials ◽  
Mercapto Groups

In order to obtain some noticeable microelectronic materials, one-dimensional gold nanowires with diameters down to 50 nm were prepared by electroless plating and gold nano-particles self-assembling. The forming mechanism of gold nanowires that gold nano-particles come into being gold nanowires by self-assembling on surfaces of carbon nanotubes (CNTs) templates at presence of mercapto groups (-SH) was proved. The carbon nanotubes modified by mercapto groups were prepared by reacting with the mixed acid solution of HNO3and H2SO4, LiAlH4, PBr3, NaHS in turn. The microstructure of gold nanowires was shown by TEM image and the active mercapto groups inarched onto surfaces of carbon nanotubes were demonstrated by XPS analysis.

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.

Electric-Field-Driven Fluid Flow Around Nano Particles

2004 ◽  
Author(s):  
Jaehyun Chung ◽  
Kyong-Hoon Lee ◽  
Rodney S. Ruoff ◽  
Junghoon Lee
Keyword(s):  
Carbon Nanotubes ◽  
Fluid Flow ◽  
Electric Field ◽  
Flow Patterns ◽  
Periodic Array ◽  
Nano Particles ◽  
Significant Progress ◽  
Modeling Simulation ◽  
Guided Assembly

Recently there has been significant progress in assembling an array of individual carbon nanotubes (CNTs) on microfabricated electrodes using the Composite Electric-field Guided Assembly (CEGA) method. This technology allows for integrating individual nano components with micro/nano systems, and should find application in areas such as sensors and NEMS devices. For realizing this as a viable technology, it is crucial to understand the electric-field-driven flow around the nanostructures being deposited. We previously discovered that the flow patterns that are present can lead to deposition of a periodic array CNTs. Here, we present recent experimental observations and the results of modeling/simulation on the electric-field-driven flow around CNTs. The results suggest that this method of assembling nanostructures be used for integration with an accuracy approaching tens of nanometers.

Sign in / Sign up

Export Citation Format

Share Document