A Nb2CTx/sodium alginate-based composite film with neuron-like network for self-powered humidity sensing

Zhao, Qiuni; Jiang, Yadong; Duan, Zaihua; Yuan, Zhen; Zha, Jiajia; Wu, Zhikang; Huang, Qi; Zhou, Zhan; Li, Hai; He, Feng; Su, Yuanjie; Tan, Chaoliang; Tai, Huiling

doi:10.1016/j.cej.2022.135588

Cited by 131 publications

(55 citation statements)

References 56 publications

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“…In the present work, the embroidered face mask sensor represents a capacitance-type humidity sensor, and the capacitance ( C ) of the sensor is defined by C = ε A /4π kd where ε represents the permittivity of the dielectric; A is the electrode surface area; k is the electrostatic force constant; and d represents the thickness of the dielectric. Given that A and d are constant, C is directly proportional to ε. − The dielectric permittivity of polymer materials is reportedly much smaller than water, allowing the permittivity of the hygroscopic threads to increase when they come into contact with water molecules. Therefore, the capacitance of the humidity sensor increases along with an increase in humidity. , …”

Section: Resultsmentioning

confidence: 99%

Polymer-Thread-Based Fully Textile Capacitive Sensor Embroidered on a Protective Face Mask for Humidity Detection

et al. 2022

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The COVID-19 pandemic has created a situation where wearing personal protective masks is a must for every human being and introduced them as a part of everyday life. This work demonstrates a new functionality embedded in single-use face masks through an embroidered humidity sensor. The design of the face mask humidity sensor is comprised of interdigitated electrodes made of polyamide-based conductive threads and common polyester threads which act as a dielectric sensing layer embroidered between them. Therefore, the embroidered sensor acts as a capacitor, the performance of which was studied in increasing humidity conditions in the frequency range from 1 Hz to 100 kHz. The moisture adsorbed by sensitive hygroscopic polyester threads altered their dielectric and permittivity properties which were detected by the change in capacitance values of the face mask sensors at different relative humidity (RH) levels. The calculated limit of detection (LOD) values for the two proposed sensors at different frequencies (1, 10, and 100 kHz) were found in the range from 11.46% RH−27.41% RH and 29.79% RH−38.65% RH. The tested sensors showed good repeatability and stability under different humidity conditions over a period of 80 min. By employing direct embroidery of silver-coated polyamide conductive threads and moisture-sensitive polyester threads onto the face mask, the present work exploits the application of polymer-based textile materials in developing novel stretchable sensing devices toward e-textile applications.

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Section: Resultsmentioning

confidence: 99%

Polymer-Thread-Based Fully Textile Capacitive Sensor Embroidered on a Protective Face Mask for Humidity Detection

et al. 2022

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Section: D Nanomaterials In Megsmentioning

confidence: 99%

“…The utilization of MXene in MEGs was also studied as a composite with SA . As a control experiment, it was found that the pure SA nanofiber film was incapable of inducing an electrical potential due to low hydrophilicity at low RH.…”

Section: D Nanomaterials In Megsmentioning

confidence: 99%

“…100 The utilization of MXene in MEGs was also studied as a composite with SA. 105 As a control experiment, it was found that the pure SA nanofiber film was incapable of inducing an electrical potential due to low hydrophilicity at low RH. Although the pure SA network displays an electrical signal at elevated RH, a performance saturation occurs at high RH (>70%).…”

Section: Transition Metal Materialsmentioning

confidence: 99%

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Two-Dimensional Nanomaterials for Moisture-Electric Generators: A Review

Feng

Zhu

et al. 2022

ACS Appl. Nano Mater.

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As an emerging candidate for a sustainable power supply, moisture-electric generators (MEGs) have attracted great attention in recent years. Unlike the conventional hydroelectric system, MEGs propose to harvest energy from ambient moisture, driven by either ion diffusion under a concentration gradient or the interaction between a solid–liquid interface governed by electrostatic theory. Two-dimensional (2D) nanomaterials, in particular hydrophilic graphene oxide (GO), have been considered as the most promising materials for high-performance MEGs owing to their unique structure and properties. In line with the development of 2D nanomaterials, the recent electrical output of a single MEG has been greatly raised from tens to hundreds of millivolts, which is capable of powering commercial electronics. Herein, we have reviewed the recent progress of 2D nanomaterials in MEGs. The mechanism of moisture-induced electricity generation and strategies for tailoring 2D nanomaterials to enhance the output performance of MEGs are discussed. The potential application of MEGs is also discussed in two categories: sensing and power supply. Finally, the existing challenges and the perspective of MEGs are proposed for future study.

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“…[19][20][21][22] On the other hand, strain sensors have attracted tremendous attention in the eld of human-machine interaction, personal healthcare diagnosis, human motion monitoring, electronic skins, and so robots, because they can transform various external deformation into detectable and repeatable electrical signals. [23][24][25][26][27][28][29][30][31][32] Up to now, various cellulose conductive hydrogels have been designed and studied as exible supercapacitors and strain sensors. 10,16,18,[33][34][35][36][37][38][39][40][41][42] For instance, Chen et al fabricated a zinc-ion hybrid supercapacitor with a ZnSO 4 /polyvinyl alcohol/cellulose hydrogel, with an areal capacitance of 504.9 mF cm À2 .…”

Section: Introductionmentioning

confidence: 99%

A flexible, robust cellulose/phytic acid/polyaniline hydrogel for all-in-one supercapacitors and strain sensors

Wan

Qin

2022

J. Mater. Chem. A

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A Nb2CTx/sodium alginate-based composite film with neuron-like network for self-powered humidity sensing

Cited by 131 publications

References 56 publications

Polymer-Thread-Based Fully Textile Capacitive Sensor Embroidered on a Protective Face Mask for Humidity Detection

Polymer-Thread-Based Fully Textile Capacitive Sensor Embroidered on a Protective Face Mask for Humidity Detection

Two-Dimensional Nanomaterials for Moisture-Electric Generators: A Review

A flexible, robust cellulose/phytic acid/polyaniline hydrogel for all-in-one supercapacitors and strain sensors

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