scholarly journals Impact of Fabric Properties on Textile Pressure Sensors Performance

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4686 ◽  
Author(s):  
Luca Possanzini ◽  
Marta Tessarolo ◽  
Laura Mazzocchetti ◽  
Enrico Gianfranco Campari ◽  
Beatrice Fraboni
Keyword(s):  
Pressure Range ◽  
Operation Mode ◽  
Conductive Polymer ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Foot Pressure ◽  
Sensing Applications ◽  
High Pressure Range ◽  
Physical And Chemical ◽  
Ink Formulation

In recent years, wearable technologies have attracted great attention in physical and chemical sensing applications. Wearable pressure sensors with high sensitivity in low pressure range (<10 kPa) allow touch detection for human-computer interaction and the development of artificial hands for handling objects. Conversely, pressure sensors that perform in a high pressure range (up to 100 kPa), can be used to monitor the foot pressure distribution, the hand stress during movements of heavy weights or to evaluate the cyclist’s pressure pattern on a bicycle saddle. Recently, we developed a fully textile pressure sensor based on a conductive polymer, with simple fabrication and scalable features. In this paper, we intend to provide an extensive description on how the mechanical properties of several fabrics and different piezoresistive ink formulation may have an impact in the sensor’s response during a dynamic operation mode. These results highlight the complexity of the system due to the presence of various parameters such as the fabric used, the conductive polymer solution, the operation mode and the desired pressure range. Furthermore, this work can lead to a protocol for new improvements and optimizations useful for adapting textile pressure sensors to a large variety of applications.

scholarly journals Highly-Sensitive Textile Pressure Sensors Enabled by Suspended-Type All Carbon Nanotube Fiber Transistor Architecture

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1103
Author(s):  
Jae Sang Heo ◽  
Keon Woo Lee ◽  
Jun Ho Lee ◽  
Seung Beom Shin ◽  
Jeong Wan Jo ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Pressure Sensor ◽  
Pressure Range ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Low Pressure ◽  
Electronic Textiles ◽  
Carbon Nanotube Fiber ◽  
Cnt Fiber ◽  
Walled Carbon Nanotubes

Among various wearable health-monitoring electronics, electronic textiles (e-textiles) have been considered as an appropriate alternative for a convenient self-diagnosis approach. However, for the realization of the wearable e-textiles capable of detecting subtle human physiological signals, the low-sensing performances still remain as a challenge. In this study, a fiber transistor-type ultra-sensitive pressure sensor (FTPS) with a new architecture that is thread-like suspended dry-spun carbon nanotube (CNT) fiber source (S)/drain (D) electrodes is proposed as the first proof of concept for the detection of very low-pressure stimuli. As a result, the pressure sensor shows an ultra-high sensitivity of ~3050 Pa−1 and a response/recovery time of 258/114 ms in the very low-pressure range of <300 Pa as the fiber transistor was operated in the linear region (VDS = −0.1 V). Also, it was observed that the pressure-sensing characteristics are highly dependent on the contact pressure between the top CNT fiber S/D electrodes and the single-walled carbon nanotubes (SWCNTs) channel layer due to the air-gap made by the suspended S/D electrode fibers on the channel layers of fiber transistors. Furthermore, due to their remarkable sensitivity in the low-pressure range, an acoustic wave that has a very tiny pressure could be detected using the FTPS.

scholarly journals Effect of polythiophene thickness on hybrid sensor sensitivity

2021 ◽  
Vol 60 (1) ◽  
pp. 839-845
Author(s):  
Samia Belhousse ◽  
Fatma-Zohra Tıghılt ◽  
Sarah Bennıa ◽  
Sarah Adjtoutah ◽  
Sabrina Sam ◽  
...  
Keyword(s):  
Room Temperature ◽  
Secondary Ion Mass Spectrometry ◽  
High Surface ◽  
High Surface Area ◽  
Conductive Polymer ◽  
High Sensitivity ◽  
Electrochemical Anodization ◽  
Sensing Applications ◽  
The Stability ◽  
Electrical Characterizations

Abstract In recent years, hybrid structures have attracted wide consideration because they generate new very interesting properties. In this study, a hybrid gas sensor was developed using a simple fabrication process from the combination of porous silicon (PSi) and polythiophene (PTh). The study of the effect of electropolymerization rate and film thickness of PTh on the sensitivity and the stability of sensor was realized at room temperature. PSi was formed by electrochemical anodization, and it is an interesting material for sensing applications due to its high surface area. However, to avoid its degradation and to preserve its properties over the time, PSi surface was functionalized electrochemically with PTh subsequently to thermal oxidation. PTh as a conductive polymer is known for its high sensitivity and stability to environmental change. Several thicknesses of PTh have been electropolymerized onto the oxidized PSi surface to determine the best conditions for developing a sensitive and stable sensor. PTh thickness was controlled by the number of applied voltammogram cyclic. The characterizations of the different elaborated surfaces were carried out by Fourier transform infrared spectroscopy, scanning electron microscopy, cyclic voltammetry, contact angle, and secondary ion mass spectrometry. Finally, we studied the sensitivity, the response time, and the stability of PSi/PTh structures with different PTh thicknesses in the presence of CO2 gas and under cigarette smoke, by performing electrical characterizations, at room temperature.

scholarly journals E-Skin Pressure Sensors Made by Laser Engraved PDMS Molds

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1039 ◽  
Author(s):  
Andreia dos Santos ◽  
Nuno Pinela ◽  
Pedro Alves ◽  
Rodrigo Santos ◽  
Elvira Fortunato ◽  
...  
Keyword(s):  
Pressure Wave ◽  
Pressure Range ◽  
Low Cost ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Wave Detection ◽  
Piezoresistive Sensors ◽  
Electronic Skin ◽  
Large Pressure ◽  
Skin Pressure

This work describes the production of electronic-skin (e-skin) piezoresistive sensors, which micro-structuration is performed using laser engraved molds. With this fabrication approach, low-cost sensors are easily produced with a tailored performance. Sensors with micro-cones and a high sensitivity of −1 kPa−1 under 600 Pa are more adequate for the blood pressure wave detection, while sensors micro-structured with semi-spheres and a maximum sensitivity of −6 × 10−3 kPa−1 in a large pressure range (1.6 kPa to 100 kPa) are more suitable for robotics and functional prosthesis.

scholarly journals Study on the forming and sensing properties of laser-sintered TPU/CNT composites for plantar pressure sensors

2021 ◽  
Author(s):  
Yu Zhuang ◽  
Yanling Guo ◽  
Jian Li ◽  
Yueqiang Yu ◽  
Kaiyi Jiang ◽  
...  
Keyword(s):  
High Performance ◽  
Thermoplastic Polyurethane ◽  
Selective Laser Sintering ◽  
Conductive Polymer ◽  
Three Dimensional ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Sensing Element ◽  
Resistance Response ◽  
Detection Range

AbstractConductive polymer composites (CPCs) combining with specific microstructures (micropores, microcracks, etc.) can exhibit unique resistance response changes, which can be widely regarded as an effective way to improve sensing performance. This study takes advantage of the characteristics of the formation of tiny pores between crystal grains during selective laser sintering (SLS) processing to introduce a microporous structure into the thermoplastic polyurethane (TPU)/carbon nanotube (CNT) sensing element to prepare a three-dimensional porous conductive structure. The effect of the SLS process on sensing sensitivity, accuracy, and density was studied, and its sensing and forming mechanism were discussed. By adjusting SLS process parameters to control the performance of porous structure sensor elements, a final TPU/CNT sensor element with a wide pressure detection range, high sensitivity, a fast response time, and good stability and durability was developed. Finally, the optimal performance of the developed flexible pressure sensor was successfully used to detect the pressure distribution of the human foot. This study provided a simple and effective research method to develop high-performance flexible pressure sensors.

scholarly journals Sea urchin-like microstructure pressure sensors with an ultra-broad range and high sensitivity

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiu-man Wang ◽  
Lu-qi Tao ◽  
Min Yuan ◽  
Ze-ping Wang ◽  
Jiabing Yu ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Pressure Sensor ◽  
Pressure Range ◽  
Synergistic Effects ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Fast Response ◽  
Carbon Layer ◽  
Single Structure ◽  
Wide Pressure Range

AbstractSensitivity and pressure range are two significant parameters of pressure sensors. Existing pressure sensors have difficulty achieving both high sensitivity and a wide pressure range. Therefore, we propose a new pressure sensor with a ternary nanocomposite Fe2O3/C@SnO2. The sea urchin-like Fe2O3 structure promotes signal transduction and protects Fe2O3 needles from mechanical breaking, while the acetylene carbon black improves the conductivity of Fe2O3. Moreover, one part of the SnO2 nanoparticles adheres to the surfaces of Fe2O3 needles and forms Fe2O3/SnO2 heterostructures, while its other part disperses into the carbon layer to form SnO2@C structure. Collectively, the synergistic effects of the three structures (Fe2O3/C, Fe2O3/SnO2 and SnO2@C) improves on the limited pressure response range of a single structure. The experimental results demonstrate that the Fe2O3/C@SnO2 pressure sensor exhibits high sensitivity (680 kPa−1), fast response (10 ms), broad range (up to 150 kPa), and good reproducibility (over 3500 cycles under a pressure of 110 kPa), implying that the new pressure sensor has wide application prospects especially in wearable electronic devices and health monitoring.

Study on Volleyball Athletes Foot Pressure Acquisition Method

2013 ◽  
Vol 303-306 ◽  
pp. 274-279
Author(s):  
Min Shu ◽  
Yi Yang Li ◽  
Xing Zhi Liao
Keyword(s):  
Professional Training ◽  
Dynamic Pressure ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Sports Injury ◽  
Fast Response ◽  
Pvdf Film ◽  
Training Design ◽  
Foot Pressure ◽  
Athlete’S Foot

How to improve training records and skill level, and try to minimize sports injury at the same time, has increasingly become the focus of Volleyball Professional Training Design. This paper puts forward a method to acquire the foot pressure information of volleyball athlete. By utilizing PVDF film which has the advantages of fast response, high sensitivity, good mechanical properties etc., the array of pressure sensors and signal conditioning circuit have been designed and produced. Tested, this method can accurately in real time acquire volleyball athlete’s foot dynamic pressure distribution information.

Piezoresistive polymer composites based on EPDM and MWNTs for strain sensing applications

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Paola Ciselli ◽  
Lan Lu ◽  
James J.C. Busfield ◽  
Ton Peijs
Keyword(s):  
Polymer Composites ◽  
Linear Relation ◽  
Conductive Polymer ◽  
Pressure Sensors ◽  
Strain Sensing ◽  
Electrical Behavior ◽  
Multi Wall Carbon Nanotubes ◽  
Sensor Applications ◽  
Sensing Applications ◽  
Elastomeric Composites

AbstractElastomeric composites based on Ethylene-Propylene-Diene-Monomer (EPDM) filled with multi-wall carbon nanotubes (MWNTs) have been prepared, showing improved mechanical properties as compared to the pure EPDM matrix. The results have been discussed using the Guth model. The main focus of the study was on the electrical behavior of these conductive polymer composites (CPCs), in view of possible sensor applications. A linear relation has been found between conductivity and deformations up to 10% strain, which means that such materials could be used for applications such as strain or pressure sensors. Cyclic experiments were conducted to establish whether the linear relation was reversible, which is an important requirement for sensor materials.

scholarly journals Sea Urchin-like Microstructures Pressure Sensors with Ultra-sensitivity and Super Working Range

2020 ◽  
Author(s):  
Xiu Wang ◽  
Lu-Qi Tao ◽  
Min Yuan ◽  
Ze-Ping Wang ◽  
Jiabing Yu ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Pressure Sensor ◽  
Pressure Range ◽  
Sno2 Nanoparticles ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Fast Response ◽  
Carbon Layer ◽  
Single Structure ◽  
Wide Pressure Range

Abstract Sensitivity and pressure range are two significant parameters of pressure sensors. The existing pressure sensors are difficult to achieve both high sensitivity and a wide pressure range. In this regard, we proposed a new pressure sensor with a ternary nanocomposite Fe2O3/C@SnO2. Notably, the sea urchin-like Fe2O3 structure promoted signal transduction and protected Fe2O3 needles from mechanical breaking; while, acetylene carbon black improved the conductivity of Fe2O3. Moreover, one part of SnO2 nanoparticles adhered to the surface of Fe2O3 needles and formed Fe2O3/SnO2 heterostructures whereas its other part of nanoparticles dispersed into the carbon layer and formed SnO2@C structures. Collectively, the synergy of the three structures (Fe2O3/C, Fe2O3/SnO2 and SnO2@C) improved the limited pressure response range of a single structure. The experimental results demonstrated that the Fe2O3/C@SnO2 pressure sensor exhibits high sensitivity (680 kPa-1), fast response (10 ms), broad range (up to 150 kPa), and good reproducibility (over 3500 cycles under a pressure of 110 kPa). This implies that the new pressure sensor has wide application prospects especially in wearable electronic devices and health monitoring.

scholarly journals Low-Cost and Highly Sensitive Pressure Sensor with Mold-Printed Multi-Walled Carbon Nanotubes Dispersed in Polydimethylsiloxane

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5069
Author(s):  
Tim Mike de Rijk ◽  
Walter Lang
Keyword(s):  
Carbon Nanotubes ◽  
Pressure Sensor ◽  
Low Cost ◽  
Conductive Polymer ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Multi Walled Carbon Nanotubes ◽  
Pressure Changes ◽  
Flexible Pressure Sensors ◽  
Walled Carbon Nanotubes

Flexible pressure sensors with piezoresistive polymer composites can be integrated into elastomers to measure pressure changes in sealings, preemptively indicating a replacement is needed before any damage or leakage occurs. Integrating small percentages of high aspect ratio multi-walled carbon nanotubes (MWCNTs) into polymers does not significantly change its mechanical properties but highly affects its electrical properties. This research shows a pressure sensor based on homogeneous dispersed MWCNTs in polydimethylsiloxane with a high sensitivity region (0.13% kPa−1, 0–200 kPa) and sensitive up to 500 kPa. A new 3D-printed mold is developed to directly deposit the conductive polymer on the electrode structures, enabling sensor thicknesses as small as 100 μm.

Sign in / Sign up

Export Citation Format

Share Document