Development of Carbon-Nanotube-Based Nanocomposite Strain Sensor

2005 ◽  
Author(s):  
Giang T. Pham ◽  
Young-Bin Park ◽  
Ben Wang
Keyword(s):  
Carbon Nanotube ◽  
Network Formation ◽  
Composite Films ◽  
High Sensitivity ◽  
Industrial Applications ◽  
Melt Processing ◽  
Strain Sensors ◽  
Film Sensor ◽  
Loading Mode ◽  
Wide Range

This paper presents the development of carbon-nanotube-based, polymer composite films that can be used as high-sensitivity strain sensors. The films were fabricated via either melt processing or solution casting of thermoplastic polymer matrices containing low concentrations of multi-walled carbon nanotubes. The electrical resistivities of the films were measured in situ using laboratory-designed fixtures and data acquisition system. The measured resistivities were correlated with the applied strains to evaluate the sensitivity of the nanocomposite film sensor. Various types of loading mode, including tension and flexure were considered. The paper suggests that conductive network formation, thus strain sensitivity of the conductive films, can be tailored by controlling nanotube loading, degree of nanotube dispersion, and film fabrication process. The developed sensors exhibited a wide range of sensitivity, the upper limit showing nearly an order of magnitude increase compared to conventional strain gages. Military and industrial applications of the sensitivity-tunable strain sensors are presented.

scholarly journals A Review: Carbon Nanotube-Based Piezoresistive Strain Sensors

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Waris Obitayo ◽  
Tao Liu
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Films ◽  
Strain Sensors ◽  
Voltage Response ◽  
Strain Sensing ◽  
Multiwalled Carbon ◽  
Sensing Applications ◽  
Mechanical Deformations ◽  
Electrical Resistivities

The use of carbon nanotubes for piezoresistive strain sensors has acquired significant attention due to its unique electromechanical properties. In this comprehensive review paper, we discussed some important aspects of carbon nanotubes for strain sensing at both the nanoscale and macroscale. Carbon nanotubes undergo changes in their band structures when subjected to mechanical deformations. This phenomenon makes them applicable for strain sensing applications. This paper signifies the type of carbon nanotubes best suitable for piezoresistive strain sensors. The electrical resistivities of carbon nanotube thin film increase linearly with strain, making it an ideal material for a piezoresistive strain sensor. Carbon nanotube composite films, which are usually fabricated by mixing small amounts of single-walled or multiwalled carbon nanotubes with selected polymers, have shown promising characteristics of piezoresistive strain sensors. Studies also show that carbon nanotubes display a stable and predictable voltage response as a function of temperature.

On finding of high piezoresistive response of carbon nanotube films without surfactants for in-plane strain detection

2011 ◽  
Vol 22 (18) ◽  
pp. 2155-2159 ◽  
Author(s):  
Y. Miao ◽  
L. Chen ◽  
Y. Lin ◽  
R. Sammynaiken ◽  
W. J. Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Plane Strain ◽  
Composite Films ◽  
Strain Sensors ◽  
Gauge Factor ◽  
Experimental Discovery ◽  
Strain Detection ◽  
Nanotube Films

The use of carbon nanotubes (CNTs) for construction of sensors is promising. This is due to some unique characteristics of CNTs. In recent years, strain sensors built from CNT composite films have been developed; however, their low piezoresistive sensitivity (gauge factor (GF)) in in-plane strain detection is a concern compared with other strain sensors. This article reports an experimental discovery of the superior piezoresistive response of a CNT film that is free of surfactants, known as the pure CNT film. The mechanism for the high GF with the pure CNT film strain sensors is also discussed.

Ti3C2Tx MXene-graphene composite films for wearable strain sensors featured with high sensitivity and large range of linear response

Nano Energy ◽  
2019 ◽  
Vol 66 ◽  
pp. 104134 ◽  
Author(s):  
Yina Yang ◽  
Zherui Cao ◽  
Peng He ◽  
Liangjing Shi ◽  
Guqiao Ding ◽  
...  
Keyword(s):  
Linear Response ◽  
Large Range ◽  
Composite Films ◽  
High Sensitivity ◽  
Strain Sensors ◽  
Graphene Composite

Mechanical Characterization of a Nanotube-Polyethylene Composite Material

Materials ◽  
2003 ◽  
Author(s):  
Michael H. Santare ◽  
Wenzhong Tang ◽  
John E. Novotny ◽  
Suresh G. Advani
Keyword(s):  
Wear Resistance ◽  
Carbon Nanotube ◽  
Matrix Material ◽  
Peak Load ◽  
Composite Films ◽  
Melt Processing ◽  
Polyethylene Composite ◽  
Punch Test ◽  
The Matrix

High-density polyethylene (HDPE) was used as the matrix material for a carbon nanotube (CNT) polymer composites. Multi-wall carbon nanotube composite films were fabricated using the melt processing method. Composite samples with 0%, 1%, 3% and 5% nanotube content by weight were tested. The mechanical properties of the films were measured by the small punch test and wear resistance was measured with a block-on-ring wear tester. Results show increases in the stiffness, peak load, work-to-failure and wear resistance with increasing nanotube content.

Optical engineering: Diagnostics for industrial applications

2003 ◽  
Vol 217 (6) ◽  
pp. 597-617 ◽  
Author(s):  
N A Halliwell ◽  
G K Hargrave
Keyword(s):  
High Sensitivity ◽  
Industrial Sector ◽  
Diagnostic Techniques ◽  
Industrial Applications ◽  
Laser Material Processing ◽  
Gas Industry ◽  
In Situ Data ◽  
Optical Diagnostic ◽  
Optical Engineering ◽  
Wide Range

Optical engineering uses research and development of laser technology, modern photonic detection/imaging systems and optical metrology for engineering applications. It has produced a wide range of processes and techniques from high-power laser material processing to high-sensitivity metrology and has applications in every industrial sector. Modern optical diagnostic techniques are providing new experimental and in situ data, which hitherto were considered to be unobtainable. Engineers are analysing these data in order to provide immediate design improvements in the performance of components. In addition, they use the data to refine theoretical/computer models of engineering processes, which in turn provide more accurate performance prediction. This paper introduces technology now available to the optical engineer and describes how it is being used to provide optical diagnostic techniques for both solid and fluid mechanics applications in industry. The gas industry has to deal with gas provision safely and efficiently from ‘drill bit to burner tip’ and has benefited significantly from optical engineering. Examples of optical diagnostic techniques and applications, which are used to improve this process, are described.

Laser-engraved carbon nanotube paper for instilling high sensitivity, high stretchability, and high linearity in strain sensors

Nanoscale ◽  
2017 ◽  
Vol 9 (30) ◽  
pp. 10897-10905 ◽  
Author(s):  
Yangyang Xin ◽  
Jian Zhou ◽  
Xuezhu Xu ◽  
Gilles Lubineau
Keyword(s):  
Carbon Nanotube ◽  
Crack Density ◽  
High Sensitivity ◽  
Strain Sensors ◽  
High Linearity ◽  
High Crack ◽  
Ultrahigh Sensitivity

Sensors based on carbon nanotube papers with high crack density can attain ultrahigh sensitivity, high stretchability and high linearity.

Ultra-stretchable and highly sensitive strain sensor based on gradient structure carbon nanotubes

Nanoscale ◽  
2018 ◽  
Vol 10 (28) ◽  
pp. 13599-13606 ◽  
Author(s):  
Binghao Liang ◽  
Zhiqiang Lin ◽  
Wenjun Chen ◽  
Zhongfu He ◽  
Jing Zhong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Strain Sensor ◽  
High Sensitivity ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
Gauge Factor ◽  
Gradient Structure ◽  
Highly Sensitive ◽  
Highly Stretchable

A highly stretchable and sensitive strain sensor based on a gradient carbon nanotube was developed. The strain sensors show an unprecedented combination of both high sensitivity (gauge factor = 13.5) and ultra-stretchability (>550%).

A hierarchical carbon nanotube/SiO2 nanoparticle network induced superhydrophobic and conductive coating for wearable strain sensors with superior sensitivity and ultra-low detection limit

2019 ◽  
Vol 7 (14) ◽  
pp. 4199-4209 ◽  
Author(s):  
Jiefeng Gao ◽  
Lisheng Wu ◽  
Zheng Guo ◽  
Jiye Li ◽  
Cong Xu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Detection Limit ◽  
High Sensitivity ◽  
Strain Sensors ◽  
Wearable Electronics ◽  
Conductive Coating ◽  
Low Detection Limit ◽  
Sio2 Nanoparticle ◽  
Hierarchical Carbon

It is desirable to develop strain sensors with large stretchability, high sensitivity, and good anti-corrosive properties, due to their promising applications in wearable electronics.

scholarly journals A Sprayed Graphene Pattern-Based Flexible Strain Sensor with High Sensitivity and Fast Response

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1077 ◽  
Author(s):  
Wei Xu ◽  
Tingting Yang ◽  
Feng Qin ◽  
Dongdong Gong ◽  
Yijia Du ◽  
...  
Keyword(s):  
Strain Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Strain Sensors ◽  
Biomedical Science ◽  
Gauge Factor ◽  
Experimental Conditions ◽  
Simple Method ◽  
Wide Range ◽  
Flexible Strain Sensor

Flexible strain sensors have a wide range of applications in biomedical science, aerospace industry, portable devices, precise manufacturing, etc. However, the manufacturing processes of most flexible strain sensors previously reported have usually required high manufacturing costs and harsh experimental conditions. Besides, research interests are often focused on improving a single attribute parameter while ignoring others. This work aims to propose a simple method of manufacturing flexible graphene-based strain sensors with high sensitivity and fast response. Firstly, oxygen plasma treats the substrate to improve the interfacial interaction between graphene and the substrate, thereby improving device performance. The graphene solution is then sprayed using a soft PET mask to define a pattern for making the sensitive layer. This flexible strain sensor exhibits high sensitivity (gauge factor ~100 at 1% strain), fast response (response time: 400–700 μs), good stability (1000 cycles), and low overshoot (<5%) as well. Those processes used are compatible with a variety of complexly curved substrates and is expected to broaden the application of flexible strain sensors.

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