Study on the piezoresistive effect of the multiwalled carbon nanotube films

Wang, Yongtian; Liu, Zongde; Yi, Jun; Zhi-Yong, Xue

doi:10.7498/aps.61.057302

Acta Phys. Sin.

2012

DOI: 10.7498/aps.61.057302

|View full text |Cite

Study on the piezoresistive effect of the multiwalled carbon nanotube films

Yongtian Wang¹,

Zongde Liu²,

Jun Yi³

et al.

Abstract: In this paper, the piezoresistive effect of the multiwalled carbon nanotube (MWCNT) film is studied. Carbon nanotubes are synthesized by hot filament chemical vapor deposition. The piezoresistive effect in the MWCNT film is studied by a three-point bending test. The gauge factor of the MWCNT film under 500 microstrain is found to be at most 120 at room temperature, exceeding that of polycrystalline silicon (30) at 35℃. The origin of the piezoresistivity in MWCNT film is also discussed.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2014

2020

Publication Types

Select...

Article3

Relationship

Self Cite0

Independent3

Authors

Journals

Cited by 3 publications

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Self-sensing properties of smart composite based on embedded buckypaper layer

Zhang

Wei

Liu

et al. 2015

Structural Health Monitoring

View full text Add to dashboard Cite

Advanced polymer matrix composite is a brittle material, and local fibre, matrix fracture and bonding delamination will cause the catastrophic failure of the composite. So, the strain and damage structural health monitoring of the composite material and its structures is very important for its applications. Based on the piezo-resistivity effect, micro-pore structure and resin infiltration properties of buckypaper, in this study, we develop a self-sensing composite based on embedded buckypaper, which only acts as a sensing layer to monitor the strain and damage of the composite. The strain and damage of the composite are reflected by the resistance change in the embedded buckypaper. The strain sensing properties of the buckypaper/epoxy film with different buckypaper aspect ratios 3:1, 6:1, 9:1, 12:1 and 15:1 were studied with voltammetry method, and the results indicated that there were two-stage relation between resistance change and strain, and under low strain level (~2000 µε), the strain sensitivity was nonlinear and unstable, but in the high strain level, the strain sensitivity was high with strain factor about 6.2, which was independent of the dimension of buckypaper layer. The self-sensing composite made of glass fibre–reinforced composite with embedded buckypaper shows the same strain sensing properties as buckypaper/epoxy film; at same time the damage revolution of the composite could be monitored by resistance development. The scanning electron microscope characterization demonstrated that the resin can penetrate into buckypaper of the composite and form strong bonding interface. The self-sensing composite can be applied in further large-scale advanced polymer composite materials and structures structural health monitoring (strain monitoring and damage detecting).

show abstract

Self-sensing properties of smart composite based on embedded buckypaper layer

Zhang

Wei

Liu

et al. 2015

Structural Health Monitoring

View full text Add to dashboard Cite

show abstract

Design and Development of a Fully Printed Accelerometer with a Carbon Paste-Based Strain Gauge

Liu

Zhang

Zhao

et al. 2020

Sensors

View full text Add to dashboard Cite

In this paper, we present a fully printed accelerometer with a piezoresistive carbon paste-based strain gauge printed on its surface, which can be manufactured at low cost and with high efficiency. This accelerometer is composed of two parts: a sensor substrate made from high-temperature resin, which is printed by a 3D printer based on stereolithography apparatus (SLA), and a carbon paste-based strain gauge fabricated by screen-printing technology and by direct ink writing (DIW) technology for the purposes of comparison and optimization. First, the structural design, theoretical analysis, simulation analysis of the accelerometer, and analyses of the conductive mechanism and the piezoresistive mechanism of the carbon paste-based strain gauge were carried out. Then the proposed accelerometer was fabricated by a combination of different printing technologies and the curing conditions of the carbon paste were investigated. After that, the accelerometers with the screen-printed strain gauge and DIW strain gauge were characterized. The results show that the printing precision of the screen-printing process on the sensor substrate is higher than the DIW process, and both accelerometers can perform acceleration measurement. Also, this kind of accelerometer can be used in the field of measuring body motion. All these findings prove that 3D printing technology is a significant method for sensor fabrication and verification.

show abstract

Preparation and force-sensitive properties of carbon nanotube/polydimethylsiloxane composites films

An¹,

Guo²,

Chen³

et al. 2014

Acta Phys. Sin.

View full text Add to dashboard Cite

With the development of sensors, a study on carbon nanotube composites (CNT) used as force sensing elements is presented in this paper, which consists of carbon nanotubes with polydimethylsiloxane (PDMS) as a matrix. Nanocomposites of carbon nanotube and polydimethylsiloxane, CNT-PDMS with different filler concentrations have been successfully prepared via ultrasonic and mixed method. With different density, the electrical characteristics change as a function of the strain. The piezo-resistance and piezo-capacitance properties of these composites have been studied in detail. In our experiment, the gauge factor has reached 40 for piezo-resistance and 70 for piezo-capacitance. It is shown that there is an effective and reliable way, which is to change the density of CNT-PDMS nanocomposites, to set the features to sensing strain and stress for resistance and capacitance of the composites. This nanomaterial has a decent potential in mechanical quantity sensors field.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Study on the piezoresistive effect of the multiwalled carbon nanotube films

Cited by 3 publications

References 27 publications

Self-sensing properties of smart composite based on embedded buckypaper layer

Self-sensing properties of smart composite based on embedded buckypaper layer

Design and Development of a Fully Printed Accelerometer with a Carbon Paste-Based Strain Gauge

Preparation and force-sensitive properties of carbon nanotube/polydimethylsiloxane composites films

Contact Info

Product

Resources

About