Effect of SWCNT on Tribological Behavior of Polymeric Nanocomposite

The nanoscale structure of single-walled carbon nanotubes (SWCNTs) has unique properties. These nanostructured additives can induce unusual characteristic in many polymer matrix. In one of our recent experiments, it was found that when adding SWCNTs into a polyimide (PI) matrix, friction becomes a function of the concentration of the additive. In this research, we analyze the behavior of the SWCNTs-PI nano-composite using an approximation approach. We report that the frictional behavior of the nanocomposite is dominated by the elastic and plastic deformation through randomly dispersed SWCNTs under different loading conditions. At low concentration of SWCNTs, its elasticity dominates the properties of composite while at higher concentration, plastic behavior of tubes plays a major role in describing the properties of composite.

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Thermal and Small-Scale Effects on Vibration of Embedded Armchair Single-Walled Carbon Nanotubes

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.51.24 ◽

2018 ◽

Vol 51 ◽

pp. 24-38 ◽

Cited By ~ 5

Author(s):

Ahmed Hamidi ◽

Mohamed Zidour ◽

Khaled Bouakkaz ◽

Tayeb Bensattalah

Keyword(s):

Carbon Nanotubes ◽

Aspect Ratio ◽

Vibrational Mode ◽

Single Walled Carbon Nanotubes ◽

Small Scale ◽

Nano Composite ◽

Single Walled Carbon ◽

Non Local ◽

Walled Carbon Nanotubes ◽

Scale Coefficient

The non-local Timoshenko beam theory has been implemented to investigate the free vibration of armchair single-walled carbon nanotubes embedded in elastic medium including the thermal effects. The mechanical properties of nano-composite (carbon nanotubes and polymer matrix) are treated as functions of temperature change and the analytical solution is derived according to the governing equations of non-local Timoshenko beam models. The equivalent Young’s modulus and shear modulus for armchair single-walled carbon nanotubes are derived using an energy-equivalent model. Inﬂuence of small-scale coefficient, vibrational mode number, matrix of nano-composite and aspect ratio on the frequency ratio of the armchair single-walled carbon nanotubes including the thermal effect are studied and discussed. The research work reveals the significance of the small-scale coefficient, the vibrational mode number, the elastic medium and the aspect ratio on the frequency ratio. It is also demonstrated that some properties of free vibrations of single-walled carbon nanotubes are dependent on the change of temperature.

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One-step process of hydrogen storage in single walled carbon nanotubes-tin oxide nano composite

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2013.01.129 ◽

2013 ◽

Vol 38 (10) ◽

pp. 4011-4016 ◽

Cited By ~ 25

Author(s):

D. Silambarasan ◽

V.J. Surya ◽

V. Vasu ◽

K. Iyakutti

Keyword(s):

Carbon Nanotubes ◽

Hydrogen Storage ◽

Tin Oxide ◽

Single Walled Carbon Nanotubes ◽

Nano Composite ◽

Step Process ◽

Single Walled Carbon ◽

One Step ◽

Walled Carbon Nanotubes

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Nano-composite sensors composed of single-walled carbon nanotubes and polyaniline for the detection of a nerve agent simulant gas

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2014.11.137 ◽

2015 ◽

Vol 209 ◽

pp. 444-448 ◽

Cited By ~ 34

Author(s):

Ran Yoo ◽

Jeongmin Kim ◽

Min-Jung Song ◽

Wooyoung Lee ◽

Jin Seo Noh

Keyword(s):

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Nerve Agent ◽

Nano Composite ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes

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Tribological Behavior of Aligned Single-Walled Carbon Nanotubes

Journal of Engineering Materials and Technology ◽

10.1115/1.1752924 ◽

2004 ◽

Vol 126 (3) ◽

pp. 258-264 ◽

Cited By ~ 8

Author(s):

Xinling Ma ◽

Hongtao Wang ◽

Wei Yang

Keyword(s):

Carbon Nanotubes ◽

Molecular Dynamics ◽

Friction Force ◽

Tribological Behavior ◽

Applied Pressure ◽

Single Walled Carbon Nanotubes ◽

Normal Pressure ◽

Dynamics Simulation ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes

An abnormal friction law refers to the case where the friction force does not increase monotonically with the normal pressure. We investigate the possibility of abnormal tribological behavior for two surfaces coated with aligned single-walled carbon nanotubes (SWCNTs). Detailed molecular dynamics simulations for aligned SWCNTs predict modulated variation between the kinetic friction force and the applied pressure. The interacting SWCNTs float with respect to each other at about the equilibrium separation of van der Waals interaction, and the wavy contact profile breaks the symmetry of the contacting cross-section. Cases treated by molecular dynamics simulation include two aligned (10,10) SWCNTs with periodic end conditions, and a stack of three aligned (10,10) SWCNTs with free end boundary conditions. A continuum theory based on the wall deflection under finite deformation, in combination with an adhesion criterion similar to the JKR theory, on the other hand, predicts a declining law between the frictional force and the pressure. The correlation of the data obtained through the atomistic and the continuum approaches relies on a deeper understanding on the friction process among SWCNTs.

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