The effect of ball milling time and rotational speed on ultra high molecular weight polyethylene reinforced with multiwalled carbon nanotubes

2014 ◽  
Vol 37 (4) ◽  
pp. 1128-1136 ◽  
Author(s):  
Evelina Enqvist ◽  
Dmitrij Ramanenka ◽  
Paula A.A.P. Marques ◽  
José Gracio ◽  
Nazanin Emami
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Ball Milling ◽  
High Molecular Weight ◽  
Multiwalled Carbon Nanotubes ◽  
Rotational Speed ◽  
Milling Time ◽  
Multiwalled Carbon ◽  
Ultra High Molecular Weight ◽  
Ball Milling Time

scholarly journals Effect of Size of Multiwalled Carbon Nanotubes Dispersed in Gear Oils for Improvement of Tribological Properties

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Kodanda Rama Rao Chebattina ◽  
V. Srinivas ◽  
N. Mohan Rao
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Ball Milling ◽  
Multiwalled Carbon Nanotubes ◽  
Tribological Properties ◽  
Extreme Pressure ◽  
Multiwalled Carbon ◽  
Pristine Mwcnts ◽  
Gear Oil ◽  
The Stability

The aim of the paper is to investigate the effect of size of multiwalled carbon nanotubes (MWCNTs) as additives for dispersion in gear oil to improve the tribological properties. Since long pristine MWCNTs tend to form clusters compromising dispersion stability, they are mildly processed in a ball mill to shorten the length and stabilized with a surfactant before dispersing in lubricant. Investigations are made to assess the effect of ball milling on the size and structure of MWCNTs using electron microscopy and Raman spectroscopy. The long and shortened MWCNTs are dispersed in EP 140 gear oil in 0.5% weight. The stability of the dispersed multiwalled carbon nanotubes is evaluated using light scattering techniques. The antiwear, antifriction, and extreme pressure properties of test oils are evaluated on a four-ball wear tester. It is found that ball milling of MWCNTs has a strong effect on the stability and tribological properties of the lubricant. From Raman spectroscopy, it is found that ball milling time of up to 10 hours did not produce any defects on the surface of MWCNTs. The stability of the lubricant and the antiwear, antifriction, and extreme pressure properties have improved significantly with dispersion shortened MWCNTs. Ball milling for longer periods produces defects on the surface of MWCNTs reducing their advantage as oil additives.

Research the Al Material Reinforced by CNT(Carbon Nanotubes)

2011 ◽  
Vol 694 ◽  
pp. 337-340
Author(s):  
Xiao Lan Cai ◽  
Xiao Fei Wang
Keyword(s):  
Carbon Nanotubes ◽  
Ball Milling ◽  
Rotational Speed ◽  
Milling Time ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Compound Material ◽  
Energy Ball ◽  
Rotary Speed ◽  
Xrd Patterns

This paper using high energy ball milling(HEM), researched the technology of preparation of Al compound material reinforced by CNT. Researched the different milling time, rotary speed, amount of CNT and sinter technology on properties of hardness and density. Preparation the Al-CNT at milling time about 30 to 100 min, rotational speed is about 300-600/rpm.the wt% of CNT is 0-5%, Analyzed the XRD patterns、SEM and STM micrograph, the results showed the Al material could be reinforced by CNT using HEM. the hardness of Al-CNT is 75 HB and the density is 2.65 g/cm3 when milling 90 min and CNT 3%.

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