Processing and modeling of multi-walled carbon nanotube/styrene-butadiene-styrene (SBS) composites for force sensing

Author

Wang, Zhi Feng ; Wang, Pei ; Ye, Xiong Ying ; Jiang, Bo

Author_Institution

Dept. of Precision Instrum. & Mechanology, Tsinghua Univ., Beijing, China

fYear

2009

fDate

26-30 July 2009

Firstpage

756

Lastpage

757

Abstract

A novel stress-sensitive nanocomposite that can be used as flexible force sensors with tailored sensitivity was fabricated. The nanocomposite consists of MWNTs as conductive filler and SBS as polymer matrix. Some electrical and mechanical properties of MWNT/SBS films were measured. A typical percolation phenomenon was observed with the MWNT/SBS composites. The elastic modulus and Poisson´s ratio of the composites with different MWNT concentration showed no statistically significant differences. In a low stress range, the resistance of the MWNT/SBS composite film decreased rapidly with stress increasing. A modified piezoresistivity model based on simplified GEME was then conducted to predict the resistance change of the nanocomposite film in low stress range.

Keywords

Poisson ratio; carbon nanotubes; filled polymers; force sensors; nanocomposites; percolation; piezoresistance; Poisson ratio; conductive filler; elastic modulus; flexible force sensors; force sensing; general effective medium equation; modified piezoresistivity model; multiwalled carbon nanotube; percolation; polymer matrix; resistance change; simplified GEME; stress-sensitive nanocomposite; styrene-butadiene-styrene composites; Carbon nanotubes; Electric resistance; Electric variables measurement; Electrical resistance measurement; Force sensors; Mechanical factors; Mechanical variables measurement; Piezoresistance; Polymers; Stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology, 2009. IEEE-NANO 2009. 9th IEEE Conference on

Conference_Location

Genoa

ISSN

1944-9399

Print_ISBN

978-1-4244-4832-6

Electronic_ISBN

1944-9399

Type

conf

Filename

5394767