Flexible pressure sensor with a wide pressure measurement range and an agile response based on multiscale carbon fibers/carbon nanotubes composite

Zhu, Jie; Xue, Xiaofei; Jian-yi, LI; Wang, Jing; Wang, Huijuan; Xing, Ying; Zhu, Penghua

doi:10.1016/j.mee.2022.111750

Cited by 14 publications

(7 citation statements)

References 41 publications

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“…Upon the application or removal of external pressure, the sensor's output does not change immediately; instead, it stabilizes after a certain period. Response recovery time [28,29] indicates the sensor's real-time response to instantaneous pressure. A shorter response recovery time indicates a stronger real-time response and the recovery capabilities of the sensor.…”

Section: Performance Of Pressure Sensormentioning

confidence: 99%

A Dual-Mode Pressure and Temperature Sensor

Chai,

Wang,

et al. 2024

Micromachines

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The emerging field of flexible tactile sensing systems, equipped with multi-physical tactile sensing capabilities, holds vast potential across diverse domains such as medical monitoring, robotics, and human–computer interaction. In response to the prevailing challenges associated with the limited integration and sensitivity of flexible tactile sensors, this paper introduces a versatile tactile sensing system capable of concurrently monitoring temperature and pressure. The temperature sensor employs carbon nanotube/graphene conductive paste as its sensitive material, while the pressure sensor integrates an ionic gel containing boron nitride as its sensitive layer. Through the application of cost-effective screen printing technology, we have successfully manufactured a flexible dual-mode sensor with exceptional performance, featuring high sensitivity (804.27 kPa−1), a broad response range (50 kPa), rapid response time (17 ms), and relaxation time (34 ms), alongside exceptional durability over 5000 cycles. Furthermore, the resistance temperature coefficient of the sensor within the temperature range of 12.5 °C to 93.7 °C is −0.17% °C−1. The designed flexible dual-mode tactile sensing system enables the real-time detection of pressure and temperature information, presenting an innovative approach to electronic skin with multi-physical tactile sensing capabilities.

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Section: Performance Of Pressure Sensormentioning

confidence: 99%

A Dual-Mode Pressure and Temperature Sensor

Chai,

Wang,

et al. 2024

Micromachines

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“…Applying Poisson's theory and the elasticity principles to the relation gives the following. (9) Considering that the resistivity for the material at temperature T is constant when subjected to stress, the relationship can be rewritten as (10) where d is the change in value due to strain.…”

Section: B Electrical Resistance Changes Due To Strain and Temperaturementioning

confidence: 99%

“…The calibrated sensing fibre can be used in many other applications including smart clothing, sensing matrices, concrete deformation measurement, etc. [3]- [9].…”

Section: Introductionmentioning

confidence: 99%

A Test Rig for the Calibration of Strain Sensing Carbon Fibre

Durieux

Day

Vagapov

2022

2022 3rd International Conference on Communication, Computing and Industry 4.0 (C2I4)

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This paper presents the test equipment developed for the measurement and calibration of sensing carbon fibre. The testing device provides precise load application to a carbon fibre tow and measuring the microvariations of the fibre electrical resistance in a temperaturecontrolled environment. The measurement approach based on sensing carbon fibre is a method for strain measurement being recently developed and similar to the traditional strain gauge method. However, due to the integration of the sensing element into the material, it is considered the most promising alternative for carbon fibre reinforced plastic applications. The theory behind fibre strain measurement including the influence of the temperature on the fibre electrical resistance is presented. A detailed presentation of the measurement and calibration device is given including the measurement loop. The test rig is capable of testing fibres at a temperature up to 180°C and the maximum load applied to the fibre of 1500N. A 5-run test on a T300 3K carbon fibre at 100°C is provided as an example of the test rig operation. On average, the accuracy of the testing method over half load (700N) offers results having a maximum variation of 5% around the mean value of the whole set of test readings collected.

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Section: Introductionmentioning

confidence: 99%

“…Over the last several decades, research on piezoresistive sensors has been focused on sensing material fabrication and structure design. Various materials have been used as the sensing material to improve sensor performance, such as graphene, carbon black nanoparticle (CB), carbon nanotubes, other carbon-based materials, conductive polymers, nanomaterials, and novel materials such as MXene. , To enhance sensing performance, elastic polymers (silicone rubber, polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU)) − and hydrogel-like materials are chosen as elastic substrates. The sensing structure has been designed into ingenious structures, such as pyramids, cylinders, domes, and wrinkles. ,,, Despite the sensitivity having been enhanced, the linear detection range becomes limited, which is due to the limited deformation of nano–micro structure under increasing pressure.…”

Section: Introductionmentioning

confidence: 99%

Ag Nanowire/CPDMS Dual Conductive Layer Dome-Based Flexible Pressure Sensor with High Sensitivity and a Wide Linear Range

Wang

Zhong

Dai

et al. 2022

ACS Appl. Nano Mater.

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Recent research achievements for flexible pressure sensors have promoted promising applications, such as human health detection and intelligent robotics. However, striking a balance between sensitivity and linear detection range is still a challenge. In this paper, a dual conductive layer dome (DCLD) structure, where a silver (Ag) nanowire layer is used as a highly conductive layer and the composite layer of carbon black nanoparticles and polydimethylsiloxane (CPDMS) serves as a low conductive layer, is fabricated with a scratch coating process followed by dip-coating and vacuum adsorption. Benefitting from the dual conductive layer design, the sensitivity of the DCLD sensor reaches 51.7 kPa −1 over an ultrawide pressure of 0.01−250 kPa, which is far better than the CPDMS single conductive layer dome (SCLD). The circuit models of DCLD and SCLD are proposed to disclose their working mechanism. The effects of carbon black nanoparticle ratio in CPDMS and the structural matching between the DCLD structure and electrode on the sensor's performance are explored. The long-cycle stability of DCLD sensors with different fabrication methods is also compared. Additionally, it has been demonstrated that the sensor is efficient in monitoring human motion, such as finger joint flexion, pulse pulses, and human breathing, showing potential in the field of human health monitoring.

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Flexible pressure sensor with a wide pressure measurement range and an agile response based on multiscale carbon fibers/carbon nanotubes composite

Cited by 14 publications

References 41 publications

A Dual-Mode Pressure and Temperature Sensor

A Dual-Mode Pressure and Temperature Sensor

A Test Rig for the Calibration of Strain Sensing Carbon Fibre

Ag Nanowire/CPDMS Dual Conductive Layer Dome-Based Flexible Pressure Sensor with High Sensitivity and a Wide Linear Range

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