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Vol. 187, Issue 4, April 2015, pp. 129-137

 

Bullet

 

Preparation of Polyaniline Multi-wall Carbon Nanotubes Nanocomposites Films/Discs
and Characterization of their Electrical, Mechanical and Damping Properties
 

1 Weiwei LIN, 2 Xiangxing KONG, 1 Cesar LEVY

1 Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33162, USA
2 Center for Biosignatures Discovery Automation, The Biodesign Institute Arizona State University, Tempe, AZ 85287, USA
1 Tel.: +1-305-348-3643, fax: +1-305-348-1932

1 E-mail: levyez@fiu.edu

 

Received: 31 March 2015 /Accepted: 27 March 2015 /Published: 30 April 2015

Digital Sensors and Sensor Sysstems

 

Abstract: The purpose of this research was to create a sensor-actuator that could sense strain and also act similar to constrained viscoelastic material without corresponding weight addition. Frit compression method was first used to make controlled thickness of polyaniline/multi-wall carbon nanotube (PANI/MWCNT) nanocomposite films/discs. MWCNT was found to enhance both the electrical conductivity and the thermal stability properties of the nanocomposite films, and the PANI increased the Young’s modulus and hardness of the films/discs as evidenced by the nanoindentation test. Simultaneous DSC-TGA measurements showed that the PANI/22%MWCNT nanocomposites improved their thermal stability by about 50 °C compared with their pure components. Cantilever beam free vibration tests were adopted to characterize the sample damping properties. It was found that location of the sample vis-á-vis the location of the cantilever beam’s fixed support played a very important part in the damping ratio, as expected. Preliminary tests showed that the damping ratio of PANI/11%MWCNT was 0.00656 when the aluminum beam was clamped to the free, uncovered end. However, the damping ratio nearly tripled when the beam was clamped at the PANI/MWCNT covered end. By covering both sides of aluminum beam with the sample, the damping ratio reached a value of 0.072, which is 18.85 times higher than for the single sided coverage.

 

Keywords: PANI/MWCNT, Frit compression, Electrical properties, Mechanical properties, Damping properties.

 

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