Strong, high stretchable and ultrasensitive SEBS/CNTs hybrid fiber for high-performance strain sensor

Zeng, Jia; Ma, Wujun; Wang, Qianqian; Yu, Senlong; Innocent, Mugaanire Tendo

doi:10.1016/j.coco.2021.100735

Cited by 45 publications

(27 citation statements)

References 30 publications

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“…The slipping, dislocation, restructuring, and bending of graphene nano-sheets also led to the fast response time. The response time was comparable to those of previously reported graphene-based sensors 50,51 and even faster than those of graphene-based sensors, 52−54 CNTsbased strain sensors, 9,55 and carbonized silk fabric strain sensors, 56 as demonstrated in Figure 3e. Meanwhile, the shapes of resistance change curves were all consistent, and the resistance variations were all stable at the fast repeatedly bending and unbending test as shown in Figure 3f, indicating the highly durable and reliable performance of the G-Fs sensor.…”

Section: Resultssupporting

confidence: 86%

Wearable Resistive-Type Sensors Based on Graphene Fibers for Monitoring Human Motions

Zhang

et al. 2022

ACS Appl. Nano Mater.

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The potential applications in wearable electronics promote the booming development of flexible and wearable sensors in recent years. Graphene fiber (G-F), as a new smart important one-dimensional material, has outstanding conductivity and flexibility. Because of these excellent properties, G-F is an ideal material for fabricating wearable and flexible sensors. In this work, a wearable resistive-type G-Fs sensor was successfully fabricated, analyzed, and used to monitor human motions. The prepared G-Fs sensor not only had a broad range of detecting bending angles from 0 to 120° but also exhibited high sensitivity, long cycle stability, and a fast response time of about 70 ms. More importantly, the deformation sensing mechanisms of the G-Fs sensor and pure G-Fs were proposed and analyzed. The wearable G-Fs sensor demonstrated high sensitivity, accuracy, and good reproducibility in detecting human motions, such as joint and muscle movements. The excellent performances and the proposed deformation sensing of G-Fs sensors would promote the application of G-Fs in flexible and wearable electronics.

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Section: Resultssupporting

confidence: 86%

Wearable Resistive-Type Sensors Based on Graphene Fibers for Monitoring Human Motions

Zhang

et al. 2022

ACS Appl. Nano Mater.

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“…thickness 1 mm) from glass plate [18]. Previous studies prepared the foil with the same material and demonstrated excellent elastic properties of up to 800% stretchability [36]. The sensor consisted out of two silver electrodes connected by a stretchable PEDOT:PSS layer.…”

Section: Methodsmentioning

confidence: 99%

Stretchable Printed Device for the Simultaneous Sensing of Temperature and Strain Validated in a Mouse Wound Healing Model

Deferme

Jose

Bronckaers

et al. 2022

Preprint

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Temperature and strain are two vital parameters that play a significant role in wound diagnosis and healing. As periodic temperature measurements with a custom thermometer or strain measurements with conventional metallic gauges became less feasible for the modern competent health monitoring, individual temperature and strain measurement modalities incorporated into wearables and patches were developed. The proposed research in the article shows the development of a single sensor solution which can simultaneously measure both the above mentioned parameters. This work integrates a thermoelectric principle based temperature measurement approach into wearables, ensuring flexibility and bendability properties without affecting its thermo-generated voltage. The modified thermoelectric material helped to achieve stretchability of the sensor, thanks to its superior mechano-transduction properties. Moreover, the stretch-induced resistance changes become an additional marker for strain measurements so that both the parameters can be measured with the same sensor. Due to the independent measurement parameters (open circuit voltage and sensor resistance ), the sensing model is greatly attractive for measurements without cross-sensitivity. The highly resilient temperature and strain sensor show excellent linearity, repeatability and good sensitivity. Besides, due to the compatibility of the fabrication scheme to low temperature processing of the flexible materials and to mass volume production, printed fabrication methodologies were adopted to realize the sensor. This promises low cost production and a disposable nature (single use) of the sensor patch. The temperature-strain dual parameter semi-transparent sensor has been further tested on mice wounds in vivo. The preliminary experiments on mice wounds offer prospects for developing smart, i.e. sensorized, wound dressings for clinical applications.

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“…Furthermore, ideal strain sensors usually offer large and reliable electromechanical responses under a wide strain range during cyclic loading. , This must be accompanied by a certain degree of linearity to ease device calibration as well as signal analysis and processing during implementation . Despite the advantages possessed by conductive composite materials (CPCs materials), − including high sensitivity, accommodating large deformation, fast response time, and good repeatability, the influence of polymer viscoelasticity, which causes problems like nonlinear behaviors, unstable electromechanical properties, and resistance decay, is rarely investigated in these functional devices. − Viscoelastic elastomers exhibit mechanical behaviors such as stress relaxation and hysteresis after loading cycles, which directly affect signal processing and the sensing capacities of CPC materials. − These mechanical behaviors are time-dependent. , Particularly, the electromechanical resistance response of many CPCs decays during repeated deformations.…”

Section: Introductionmentioning

confidence: 99%

“…13,14 Furthermore, ideal strain sensors usually offer large and reliable electromechanical responses under a wide strain range during cyclic loading. 15,16 This must be accompanied by a certain degree of linearity to ease device calibration as well as signal analysis and processing during implementation. 17 Despite the advantages possessed by conductive composite materials (CPCs materials), 18−20 including high sensitivity, 3 accommodating large deformation, 21 fast response time, 22 and good repeatability, 23 the influence of polymer viscoelasticity, which causes problems like nonlinear behaviors, unstable electromechanical properties, and resistance decay, is rarely investigated in these functional devices.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical Performance of Strain Sensors Based on Viscoelastic Conductive Composite Polymer Fibers

Zhang

Innocent

Tang

et al. 2022

ACS Appl. Mater. Interfaces

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Flexible conductive polymer composite (CPC) fibers that show large changes in resistance with deformation have recently gained much attention as strain-sensing components for future wearable electronics. However, the electrical resistance of these materials decays with time during dynamic cyclic loading, a deformation performed to simulate their real application as strain sensors. Despite the extensive research on CPC fibers, the mechanism leading to this decay in the electromechanical response under repetitive cycles remains unreported. Herein, this behavior is investigated using fiber-based strain sensors wet spun from thermoplastic polyurethane (TPU) consisting of a carbonaceous hybrid conductive filler system of carbon black (CB) and carbon nanotubes (CNTs). We found electrical viscosity to predict the observed electromechanical resistance decay. This implies that cycling these materials enables the relaxation of both the polymer chains and the conductive network. In addition, the resulting piezoresistive fibers are sensitive to deformation in the region of low strain (gauge factor of 6.0 within 3.0% strain), remain conductive under 280.5% deformation, and are stable for more than 2000 cycles. Finally, we demonstrate the potential of TPU/CB-CNT fibers as strain sensors for monitoring human motion.

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Strong, high stretchable and ultrasensitive SEBS/CNTs hybrid fiber for high-performance strain sensor

Cited by 45 publications

References 30 publications

Wearable Resistive-Type Sensors Based on Graphene Fibers for Monitoring Human Motions

Wearable Resistive-Type Sensors Based on Graphene Fibers for Monitoring Human Motions

Stretchable Printed Device for the Simultaneous Sensing of Temperature and Strain Validated in a Mouse Wound Healing Model

Electromechanical Performance of Strain Sensors Based on Viscoelastic Conductive Composite Polymer Fibers

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