Abstract
This paper provides a preliminary study on the hysteresis compensation of a piezoresistive silicon-based polymer composite, poly(dimethylsiloxane) dispersed with carbon nanotubes (CNTs), to demonstrate its feasibility as a conductive composite (i.e., a force-sensitive resistor) for force sensors. In this study, the potential use of the nanotube/polydimethylsiloxane (CNT/PDMS) as a force sensor is evaluated for the first time. The experimental results show that the electrical resistance of the CNT/PDMS composite changes in response to sinusoidal loading and static compressive load. The compensated output based on the Duhem hysteresis model shows a linear relationship. This simple hysteresis model can compensate for the nonlinear frequency-dependent hysteresis phenomenon when a dynamic sinusoidal force input is applied.
Highlights
Over the last few decades, carbon nanotubes (CNTs) have attracted significant attention because their excellent mechanical properties, which can be applied for various sensor engineering applications [1]
The piezoresistive response of thepolymer experimentally studied to demonstrate its feasibility as a conductive
Composite was fabricated using a simple mixing method, the measured results showed that the electrical resistance was fabricated using a simple mixingtomethod, theload measured showed the electrical of the composite changed in response a dynamic as well results as different staticthat compressive load resistance of the composite changed in response to a dynamic load as well as different static levels
Summary
Over the last few decades, carbon nanotubes (CNTs) have attracted significant attention because their excellent mechanical properties, which can be applied for various sensor engineering applications [1]. CNTs enable us to find potential sensor applications when used as additives for various matrix materials because of their high thermal conductivity and attractive electrical properties. The electrical resistivity can change in response to different mechanical stimuli (e.g., stress), which is commonly called the piezoresistive effect. This effect has primarily been studied in composite materials consisting of conductive fillers and a polymer matrix. Carbon black nanocomposites have been studied as potential conductive fillers for tensile strain and pressure-sensor materials [3]
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