A highly sensitive wearable pressure sensor capsule based on PVA/Mxene composite gel

Kallingal, Nithusha; Maurya, Muni Raj; Sajna, M.S.; Yalcin, Huseyin C.; Ouakad, Hassen M.; Bahadur, Issam; Al‐Maadeed, Somaya; Sadasivuni, Kishor Kumar

doi:10.1007/s13205-022-03221-3

Cited by 7 publications

(8 citation statements)

References 19 publications

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“…Both PVA 15 /CD/HAG and PVA 15 /CD/HAG/ CD AgNP spectra exhibit a major peak at 19° (2θ) corresponding to PVA. [ 65 ] PVA 15 /CD/HAG/ CD AgNP generated two additional peaks at 38° and 44° attributed to the (111) and (200) diffracting planes of Ag, respectively. [ 66 ]…”

Section: Resultsmentioning

confidence: 99%

“…Both PVA 15 /CD/HAG and PVA 15 /CD/HAG/ CD AgNP spectra exhibit a major peak at 19°( 2𝜃) corresponding to PVA. [65] PVA 15 /CD/HAG/ CD AgNP generated two additional peaks at 38°and 44°attributed to the (111) and ( 200) diffracting planes of Ag, respectively. [66] SEM was employed to examine the surface structure of PVA 5-20 /CD/HAG and PVA 15 /CD/HAG/ CD AgNP (Figure 1c,d; Figure S5, Supporting Information).…”

Section: The Assembling Of Pva/cd/hag/ CD Agnpmentioning

confidence: 99%

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An Electroconductive and Antibacterial Adhesive Nanocomposite Hydrogel for High‐Performance Skin Wound Healing

Zheng,

Yang,

Wei

et al. 2023

Adv Healthcare Materials

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Multifunctional hydrogel adhesives inhibiting infections and enabling the electrical stimulation (ES) of tissue reparation are highly desirable for the healing of surgical wounds and other skin injuries. Herein, a therapeutic nanocomposite hydrogel is designed by integrating β‐cyclodextrin‐embedded Ag nanoparticles (CDAgNPs) in a polyvinyl alcohol (PVA) matrix enhanced with free β‐cyclodextrin (CD) and an atypical macromolecule made of β‐glucan grafted with hyaluronic acid (HAG). The main objective is to develop a biocompatible dressing combining the electroconductivity and antibacterial activity of CDAgNPs with the cohesiveness and porosity of PVA and the anti‐inflammatory, moisturizing, and cell proliferation‐promoting properties of HAG. The last component, CD, is added to strengthen the network structure of the hydrogel. PVA/CD/HAG/CDAgNP exhibited excellent adhesion strength, biocompatibility, electroconductivity, and antimicrobial activity against a wide range of bacteria. In addition, the nanocomposite hydrogel has a swelling ratio and water retention capacity suitable to serve as a wound dressing. PVA/CD/HAG/CDAgNP promoted the proliferation of fibroblast in vitro, accelerated the healing of skin wounds in an animal model, and is hemostatic. Upon ES, the PVA/CD/HAG/CDAgNP nanocomposite hydrogel became more efficient both in vitro and in vivo further speeding up the skin healing process thus demonstrating its potential as a next‐generation electroconductive wound dressing.

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Section: Resultsmentioning

confidence: 99%

Section: The Assembling Of Pva/cd/hag/ CD Agnpmentioning

confidence: 99%

An Electroconductive and Antibacterial Adhesive Nanocomposite Hydrogel for High‐Performance Skin Wound Healing

Zheng,

Yang,

Wei

et al. 2023

Adv Healthcare Materials

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“…The sensitivity value of our sensor exceeded several sensors and is much more sensitive than the reported PET/MXene film. The response times are also competitive [ 39 , 40 , 41 , 42 ]. Moreover, the minimum pressure value of 60 Pa is much lower than other flexible sensing materials.…”

Section: Resultsmentioning

confidence: 99%

PET/ZnO@MXene-Based Flexible Fabrics with Dual Piezoelectric Functions of Compression and Tension

Chen

et al. 2022

Sensors

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The traditional self-supported piezoelectric thin films prepared by filtration methods are limited in practical applications due to their poor tensile properties. The strategy of using flexible polyethylene terephthalate (PET) fabric as the flexible substrate is beneficial to enhancing the flexibility and stretchability of the flexible device, thus extending the applications of pressure sensors. In this work, a novel wearable pressure sensor is prepared, of which uniform and dense ZnO nanoarray-coated PET fabrics are covered by a two-dimensional MXene nanosheet. The ternary structure incorporates the advantages of the three components including the superior piezoelectric properties of ZnO nanorod arrays, the excellent flexibility of the PET substrate, and the outstanding conductivity of MXene, resulting in a novel wearable sensor with excellent pressure-sensitive properties. The PET/ZnO@MXene pressure sensor exhibits excellent sensing performance (S = 53.22 kPa−1), fast response/recovery speeds (150 ms and 100 ms), and superior flexural stability (over 30 cycles at 5% strain). The composite fabric also shows high sensitivity in both motion monitoring and physiological signal detection (e.g., device bending, elbow bending, finger bending, wrist pulse peaks, and sound signal discrimination). These findings provide insight into composite fabric-based pressure-sensitive materials, demonstrating the great significance and promising prospects in the field of flexible pressure sensing.

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“…Kallingal et al reported a wearable piezoresistive pressure sensor capsule that can detect pulse rate and human motion. [120] The capsule includes a flexible silicone cover and is filled with different PVA/MXene composite materials by changing the weight percentage of MXene in the polymer matrix. The sensor capsule based on PVA/MXene gel significantly gives a low detection limit of 2 kPa, shows a high sensitivity of 0.45 kPa −1 in the range of 2-10 kPa, shows a response time of about 500 ms, and has good mechanical stability and non-fading durability of 500 cycles.…”

Section: Other Gel Materialsmentioning

confidence: 99%

Recent Advances in Flexible Pressure Sensors Based on MXene Materials

Qin,

Nong,

Wang

et al. 2024

Advanced Materials

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In the past decade, with the rapid development of wearable electronics, medical health monitoring, internet of things and flexible intelligent robots, flexible pressure sensors have received unprecedented attention. As a very important kind of electronic components for information transmission and collection, flexible pressure sensor has gained a wide application prospect in the fields of aerospace, biomedical and health monitoring, electronic skin and human‐machine interface. In recent years, MXene has attracted extensive attention because of its unique two‐dimensional layered structure, high conductivity, rich surface terminal groups and hydrophilicity, which has brought a new breakthrough for flexible sensing. Thus, it has become a revolutionary pressure sensitive material with great potential. In this work, the recent advances of MXene‐based flexible pressure sensors is reviewed from the aspects of sensing type, sensing mechanism, material selection, structural design, preparation strategy and sensing application. The methods and strategies to improve the performance of MXene‐based flexible pressure sensors are analyzed in details. Finally, the opportunities and challenges faced by MXene‐based flexible pressure sensors are discussed. This review will bring the research and development of MXene‐based flexible sensors to a new high level, promoting the wider research exploitation and practical application of MXene materials in flexible pressure sensors.This article is protected by copyright. All rights reserved

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A highly sensitive wearable pressure sensor capsule based on PVA/Mxene composite gel

Cited by 7 publications

References 19 publications

An Electroconductive and Antibacterial Adhesive Nanocomposite Hydrogel for High‐Performance Skin Wound Healing

An Electroconductive and Antibacterial Adhesive Nanocomposite Hydrogel for High‐Performance Skin Wound Healing

PET/ZnO@MXene-Based Flexible Fabrics with Dual Piezoelectric Functions of Compression and Tension

Recent Advances in Flexible Pressure Sensors Based on MXene Materials

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