Impedance characteristics of surface pressure-sensitive carbon black/silicone rubber composites

Mei, Haixia; Zhang, Ce; Wang, Rui; Feng, Jianchao; Zhang, Tong

doi:10.1016/j.sna.2015.06.009

Cited by 36 publications

(19 citation statements)

References 42 publications

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“…The main outcomes from several papers have been presented in a recent detailed review illustrating the physical phenomenon behind the piezoresistive properties of innovative and smart materials for strain sensors [23]. However, it is worth evidencing that most of the available works analyze the strain sensing properties of the nanocomposites by means of DC electrical characterizations, whereas only few refer to AC measurements [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study on piezoresistive properties of a structural resin reinforced with carbon nanotubes for strain sensing and damage monitoring

Spinelli

Lamberti

Tucci

et al. 2018

Composites Part B: Engineering

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The development of embedded sensors based on a structural thermosetting epoxy resin reinforced with 0.3 wt% of multi-walled (MW) carbon nanotubes (CNTs) for real-time structural health monitoring is presented. The storage modulus of the composites is higher than 2000 MPa in a wide temperature range confirming their reliability as structural parts, especially for aeronautical applications. The piezoresistive properties are studied on specimens subjected to both tension and flexural stresses. The yield strength evaluated with the same approach adopted for metallic materials and alloys compares successfully with the information provided by the electrical characterization. Different levels of damages are revealed by the changes in the piezoresistive properties due to the morphological modifications in the conductive network of CNTs within the resin. The analysis of an empirical law is proposed for predicting the strain-dependence of the electrical and mechanical properties of material when the samples are subjected to stretch-release cycles. The average CNTs interparticle distances as function of bending is also estimated.

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Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study on piezoresistive properties of a structural resin reinforced with carbon nanotubes for strain sensing and damage monitoring

Spinelli

Lamberti

Tucci

et al. 2018

Composites Part B: Engineering

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“…including feasible preparation, low cost, and easy signal collection. Therefore, they have potentiality to be used to develop flexible pressure-sensitive sensors [1]. The use of polymer piezoelectric materials is certainly desirable, because they have special advantages over ceramics.…”

Section: Introductionmentioning

confidence: 99%

Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

Hashim

Hadi

2018

Ukr. J. Phys.

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This paper aims to the preparation of novel pressure-sensitive nanocomposites with low cost, light weight, and good sensitivity. The nanocomposites of polyvinyl alcohol, polyacrylic acid, and lead oxide nanoparticles have been investigated. The dielectric properties and dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites have been studied. The dielectric properties of nanocomposites were measured in the frequency range (100 Hz–5 MHz). The experimental results showed that the dielectric constant and dielectric loss of (PVA–PAA–PbO2) nanocomposites decrease, as the frequency increases, and they increase with the concentrations of PbO2 nanoparticles. The ac electrical conductivity of (PVA–PAA–PbO2) nanocomposites increases with the frequency and the concentrations of PbO2 nanoparticles. The dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites also increases with the concentrations of PbO2 nanoparticles. The application of pressure-sensitive nanocomposites has been examined in the pressure interval (60–200) bar. The results showed that the electrical resistance of (PVA–PAA–PbO2) pressure-sensitive nanocomposites decreases, as the compressive stress increases. The (PVA–PAA–PbO2) nanocomposites have high sensitivity to pressure.

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“…When manufacturing CPCs, materials such as: rubber, elastomer, and Polydimethylsiloxane (PDMS) are the preferably chosen solutions for the insulating phase [ 2 , 3 , 4 ]. Conductive particles are typically obtained from metals such as Nickel or Cooper [ 5 , 6 ], but more recently, carbon black or carbon nanotubes have been also employed as the conductive phase in CPCs [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Underlying Physics of Conductive Polymer Composites and Force Sensing Resistors (FSRs). A Study on Creep Response and Dynamic Loading

et al. 2017

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Force Sensing Resistors (FSRs) are manufactured by sandwiching a Conductive Polymer Composite (CPC) between metal electrodes. The piezoresistive property of FSRs has been exploited to perform stress and strain measurements, but the rheological property of polymers has undermined the repeatability of measurements causing creep in the electrical resistance of FSRs. With the aim of understanding the creep phenomenon, the drift response of thirty two specimens of FSRs was studied using a statistical approach. Similarly, a theoretical model for the creep response was developed by combining the Burger’s rheological model with the equations for the quantum tunneling conduction through thin insulating films. The proposed model and the experimental observations showed that the sourcing voltage has a strong influence on the creep response; this observation—and the corresponding model—is an important contribution that has not been previously accounted. The phenomenon of sensitivity degradation was also studied. It was found that sensitivity degradation is a voltage-related phenomenon that can be avoided by choosing an appropriate sourcing voltage in the driving circuit. The models and experimental observations from this study are key aspects to enhance the repeatability of measurements and the accuracy of FSRs.

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Impedance characteristics of surface pressure-sensitive carbon black/silicone rubber composites

Cited by 36 publications

References 42 publications

Experimental and theoretical study on piezoresistive properties of a structural resin reinforced with carbon nanotubes for strain sensing and damage monitoring

Experimental and theoretical study on piezoresistive properties of a structural resin reinforced with carbon nanotubes for strain sensing and damage monitoring

Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

Underlying Physics of Conductive Polymer Composites and Force Sensing Resistors (FSRs). A Study on Creep Response and Dynamic Loading

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