Biocompatible and Highly Stretchable PVA/AgNWs Hydrogel Strain Sensors for Human Motion Detection

Azadi, Shohreh; Peng, Shuhua; Moshizi, S.A.; Asadnia, Mohsen; Xu, Jiangtao; Park, Inkyu; Wang, Chun H.; Wu, Shuying

doi:10.1002/admt.202000426

Cited by 86 publications

(54 citation statements)

References 47 publications

(50 reference statements)

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“…Interestingly, a similar PVA/AgNWs hydrogel sensor with biocompatibility and high stretchability was reported that can be applied as strain sensors. The hydrogel material can be stretched up to 500% while maintaining its sensing linearity, which can be applied to human skin and monitor the body motion [116]. Previous studies also showed that the introduction of PVA hydrogels in ionconducting cellulose hydrogels increases the tensile properties of the sensors [117,118].…”

Section: 42mentioning

confidence: 99%

Poly(vinyl alcohol) Hydrogels: The Old and New Functional Materials

Wang

Bai

Shao

et al. 2021

International Journal of Polymer Science

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Hydrogels have three-dimensional network structures, high water content, good flexibility, biocompatibility, and stimulation response, which have provided a unique role in many fields such as industry, agriculture, and medical treatment. Poly(vinyl alcohol) PVA hydrogel is one of the oldest composite hydrogels. It has been extensively explored due to its chemical stability, nontoxic, good biocompatibility, biological aging resistance, high water-absorbing capacity, and easy processing. PVA-based hydrogels have been widely investigated in drug carriers, articular cartilage, wound dressings, tissue engineering, and other intelligent materials, such as self-healing and shape-memory materials, supercapacitors, sensors, and other fields. In this paper, the discovery, development, preparation, modification methods, and applications of PVA functionalized hydrogels are reviewed, and their potential applications and future research trends are also prospected.

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Section: 42mentioning

confidence: 99%

Poly(vinyl alcohol) Hydrogels: The Old and New Functional Materials

Wang

Bai

Shao

et al. 2021

International Journal of Polymer Science

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“…The textile sensor was attached to skin of different parts of human body to measure the joints bending of different motions under normal condition, as shown in Figure 6. Our AuNWs/ textile sensor can be attached on to finger, [51] wrist, [52] elbow, knee, foot to monitor finger pressure, bend of finger joint, cervical vertebra, and gait characters. The piezoresistive signal for arm flexion was also recorded (Figure S7, Supporting Information).…”

Section: Wearable Piezoresistive Sensor For Motion Signal Monitoringmentioning

confidence: 99%

A Wearable Sensor Based on Gold Nanowires/Textile and Its Integrated Smart Glove for Motion Monitoring and Gesture Expression

Zhao

Dong

et al. 2021

Energy Tech

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According to the sensing mechanism, pressure sensors can be divided into five types: piezoelectric, [1,2] piezoelectric resistivity, [3][4][5][6] capacitance, [7,8] triboelectric, [9,10] and transistor. [11] Piezoresistive sensors have attracted much attention in recent years due to their simple design, low manufacturing cost, good signal repeatability, low power consumption, low working voltage, and simple measurement scheme. [12][13][14][15][16][17][18] The elastic pressure sensor is usually composed of sensing material, substrate material, and electrode. The sensing material can be filled or coated on the substrate material to activate the conductive path. Under the external pressure, the contact area between the surface conductive elements increases significantly, resulting in a significant decrease in the path resistance or contact resistance. The change of resistance is due to the deformation of the microstructure under pressure, which leads to the change of the contact area. The traditional rigid material pressure sensor has been eliminated due to its poor reliability and low applicability. As an optional piezoresistive material, nanomaterials have been proved to be potential components of novel strain sensors with enhanced performance. High-performance sensor devices based on several typical nanostructures, such as carbon nanotubes [19,20] and graphene, have been developed. [21] However, the sensors based on these materials have some defects, such as complex manufacturing processes and unknown toxicity.Sensing material is the essential component of a pressure sensor. In terms of sensing materials, metal nanomaterials, as one of the most popular multifunctional conductive materials, have been widely used in chemistry, biomedical, optical, and other fields. [22] Specifically, gold nanowires (AuNWs) are a flexible filamentous structure in the nanoscale and behave like polymer chains because of their ultrathin nature (2 nm in width and >10 000 in aspect ratio). [23] AuNWs have the advantages of high chemical inertness, good biocompatibility, wide electrochemical window, high conductivity, and easy surface modification that depends on thiol gold chemistry. Zhang and co-workers reported a pulse monitoring sensor based on AuNWs and polyacrylamide

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“…More recently, new classes of intrinsically stretchable sensing materials have been developed by creating conductive networks in highly stretchable polymers. [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ] Furthermore, self‐powered and low‐powered sensors have recently been created based on piezoelectric or triboelectric materials. [ 48 , 49 ] Below we summarize the state‐of‐the‐art wearable sensors capable of measuring respiratory behavior, body temperature, and blood oxygen saturation to the comparable performance as existing point‐of‐care diagnostic equipment, with a focus on material design and fabrication methods.…”

Section: Wearable Sensors For Remote Health Monitoringmentioning

confidence: 99%

Wearable Sensors for Remote Health Monitoring: Potential Applications for Early Diagnosis of Covid‐19

Mirjalali

Peng

Fang³

et al. 2021

Adv Materials Technologies

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Wearable sensors are emerging as a new technology to detect physiological and biochemical markers for remote health monitoring. By measuring vital signs such as respiratory rate, body temperature, and blood oxygen level, wearable sensors offer tremendous potential for the noninvasive and early diagnosis of numerous diseases such as Covid‐19. Over the past decade, significant progress has been made to develop wearable sensors with high sensitivity, accuracy, flexibility, and stretchability, bringing to reality a new paradigm of remote health monitoring. In this review paper, the latest advances in wearable sensor systems that can measure vital signs at an accuracy level matching those of point‐of‐care tests are presented. In particular, the focus of this review is placed on wearable sensors for measuring respiratory behavior, body temperature, and blood oxygen level, which are identified as the critical signals for diagnosing and monitoring Covid‐19. Various designs based on different materials and working mechanisms are summarized. This review is concluded by identifying the remaining challenges and future opportunities for this emerging field.

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Biocompatible and Highly Stretchable PVA/AgNWs Hydrogel Strain Sensors for Human Motion Detection

Cited by 86 publications

References 47 publications

Poly(vinyl alcohol) Hydrogels: The Old and New Functional Materials

Poly(vinyl alcohol) Hydrogels: The Old and New Functional Materials

A Wearable Sensor Based on Gold Nanowires/Textile and Its Integrated Smart Glove for Motion Monitoring and Gesture Expression

Wearable Sensors for Remote Health Monitoring: Potential Applications for Early Diagnosis of Covid‐19

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