Smart- textile strain sensor for human joint monitoring

Alam, Tanvir; Saidane, Fadoua; Faisal, Abdullah al; Khan, Ashaduzzaman; Hossain, Gaffar

doi:10.1016/j.sna.2022.113587

Cited by 26 publications

(11 citation statements)

References 37 publications

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“…The GF is defined by (ΔRL0)/(R0ΔL). The GF of the strain sensor was small (GF = 0.307) compared with previous studies[25,29,33,35] but it was larger than the cotton yarn with Ag-paste[22] and Ag-coated nylon[42]. Hence, we found that the twisted rGOC yarn could be used as a motion sensor.…”

mentioning

confidence: 58%

“…Cotton fabric has been decorated with Ag nanowires, Ag flowers, and Ag thread [17][18][19][20], and coatings of electrochemically exfoliated graphene film on cotton fabric [21], and coatings of Ag on cotton yarn using Ag paste followed by sintering [22] have been used to provide electrical conductivity. Likewise, electronic textiles for sensors fabricated with nylon and polyester have been achieved using conducting polymer [23], Au and MoS2-coating [24], graphite-polyurethane (PU) coating on crochet knitted elastic [25], screen-printing of elastic conductive carbon ink on polyester fabric [26], wet-spinning of CNT/thermoplastic PU on silver-plated nylon electrodes [27], coating of CNT/carbon black-PU on the fabric with Ag-coated conductive nylon fiber [28], and spraying of multiwall CNT/TiO2 conductive suspension on nylon textiles [29]. Mxene has also been introduced to textiles to improve sensitivity [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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Flexible Mechanical Sensors Fabricated with Graphene Oxide-Coated Commercial Silk

Jang,

Lee,

Kim

2024

Preprint

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Many studies on flexible strain and pressure sensors have been reported due to growing interest in wearable devices for healthcare. However, most are fabricated with multiple ingredients and complicated methods even though commercial textiles, such as cotton, nylon, polyester, and silk were used. Here we present flexible pressure and strain (motion) sensors prepared with only graphene oxide (GO) and commercial silk fabrics and yarns. The pressure sensors were fabricated by simply dipping the silk fabric into GO solution followed by thermal treatment at 400 °C for reduction of GO (rGO). The pressure sensors were made from rGO-coated fabrics, which were stacked in 3-, 5-, and 7-layers. The super-sensitivity of 2.58 ×103 kPa-1 at low pressure was observed in the 7-layer pressure sensor. The strain sensors were obtained from rGO-coated twisted silk yarns whose gauge factor was 0.307. Although this value is small or comparable to other sensors, it is appropriate for motion sensing. The results of this study show a cost-effective and simple method for the fabrication of pressure and motion sensors with commercial silk and GO.

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mentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Flexible Mechanical Sensors Fabricated with Graphene Oxide-Coated Commercial Silk

Jang,

Lee,

Kim

2024

Preprint

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“…Moreover, due to the different wiring harness layout directions, natural stress concentration sites are formed at the intersection. Even under small strain, serious fracture still frequently occurred, resulting in a sharp change of resistance [163,164]. Li et al [162] proposed a simple strategy of CVD for fabricating strain sensors based on braided graphene ribbons by replicating the sensing layer with braided copper strips.…”

Section: Pure Graphene-based Sensorsmentioning

confidence: 99%

0D to 2D carbon-based materials in flexible strain sensors: recent advances and perspectives

Liu

Zhang

et al. 2023

2D Mater.

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In the past decade, flexible strain sensors have attracted much attention in the fields of health care, soft robots and other flexible electronics due to their unique flexibility, high stability, and strong mechanical properties. To further meet the requirements of the excellent performance for electronic equipment, carbon-based conductive sensitive materials have become one of the first choice for the preparation of flexible strain sensors due to their excellent electrical conductivity, mechanical properties, and high compatibility. Herein, based on different strain behaviors, this paper analyzes the working mechanism of tensile and compressive strain sensors, focusing on the latest research progress of carbon-based conductive materials in strain sensors with different dimensions. The applications of carbon-based sensitive materials with multifunctional strain sensing in the areas of physiological information detection, human motion, human-machine interaction, and visual display have also been summarized. Furthermore, it has been attempted to discuss the current challenges of carbon-based strain sensors as well as the prospect of flexible strain sensors. This review is aimed to provide appropriate references for further exploitation of multi-functional flexible carbon-based strain sensors.

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“…Here, physiological activities are defined as small strains of activity necessary for the human body to maintain a healthy state under normal condition, such as pulse, [5,6] heartbeat, [7,8] and respiration. [9][10][11] While limb activities refer to the bending and extension of the various joints during body movements, these joints include fingers, [12][13][14][15] elbows, [16][17][18] and knees. [19] By monitoring human activities, KFSS can achieve physiological health data recording, sports tracking, medical monitoring, and safety protection, showing broad application prospects in wearable electronics and multifunctional smart clothing.…”

Section: Introductionmentioning

confidence: 99%

A Review on Knitted Flexible Strain Sensors for Human Activity Monitoring

Liu,

Liang,

Wan

et al. 2023

Adv Materials Technologies

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The recent surge in using wearable personalized devices has made it increasingly important to flexible textile‐based sensors that can be worn comfortably and can sense various body strains. Among them, the knit‐based flexible strain sensors (KFSS) show growing promise for human activity monitoring applications due to its processing flexibility, low cost, wearing comfortability, large strain performance, and high elastic recovery rate. Herein, five sensing mechanisms of knitted flexible strain sensors containing contact resistance, length resistance, tunneling effect, micro‐crack propagation, and disconnection mechanism are summarized, which can be used on different human activity strain conditions, e.g., physiological activities and limb activities. The main fabrication approaches, including knitting techniques, post‐processing techniques, embroidery, and sewing techniques are discussed. Six crucial parameters with corresponding calculation formulas for evaluating sensing performance and review specific applications of KFSS for human limb activity and physiological activity monitoring in healthcare, motion tracking, safety protection, and human–machine interaction are also described. Finally, the tough challenges and prospects of KFSS with the aim of providing meaningful guidance and direction for future research are critically analyzed.

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Smart- textile strain sensor for human joint monitoring

Cited by 26 publications

References 37 publications

Flexible Mechanical Sensors Fabricated with Graphene Oxide-Coated Commercial Silk

Flexible Mechanical Sensors Fabricated with Graphene Oxide-Coated Commercial Silk

0D to 2D carbon-based materials in flexible strain sensors: recent advances and perspectives

A Review on Knitted Flexible Strain Sensors for Human Activity Monitoring

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