Development of flexible and wide-range polymer-based temperature sensor for human bodies

Nakamura, Tatsuya; Yokota, Tomoyuki; Terakawa, Yuki; Reeder, Jonathan T.; Voit, Walter; Sekino, Masaki

doi:10.1109/bhi.2016.7455940

Cited by 19 publications

(7 citation statements)

References 9 publications

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“…Conductive hydrogels incorporate an additional functionality by enabling the conduction of electricity. Such materials have great potential for use in wearable and implantable sensors for healthcare, mimicry of neural networks, soft robotics, and electro‐stimulated drug release …”

Section: Introductionmentioning

confidence: 99%

Conductive Tough Hydrogel for Bioapplications

Javadi

Naficy

et al. 2017

Macromolecular Bioscience

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Biocompatible conductive tough hydrogels represent a new class of advanced materials combining the properties of tough hydrogels and biocompatible conductors. Here, a simple method, to achieve a self-assembled tough elastomeric composite structure that is biocompatible, conductive, and with high flexibility, is reported. The hydrogel comprises polyether-based liner polyurethane (PU), poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(4-styrenesulfonate) (PSS), and liquid crystal graphene oxide (LCGO). The polyurethane hybrid composite (PUHC) containing the PEDOT:PSS, LCGO, and PU has a higher electrical conductivity (10×), tensile modulus (>1.6×), and yield strength (>1.56×) compared to respective control samples. Furthermore, the PUHC is biocompatible and can support human neural stem cell (NSC) growth and differentiation to neurons and supporting neuroglia. Moreover, the stimulation of PUHC enhances NSC differentiation with enhanced neuritogenesis compared to unstimulated cultures. A model describing the synergistic effects of the PUHC components and their influence on the uniformity, biocompatibility, and electromechanical properties of the hydrogel is presented.

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Section: Introductionmentioning

confidence: 99%

Conductive Tough Hydrogel for Bioapplications

Javadi

Naficy

et al. 2017

Macromolecular Bioscience

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“…The authors of [38] introduced a sensor based on a ferroelectric polymer that generates a charge when tensile pressure is applied, acting as a transducer. The authors of [41] suggested a body temperature sensor based on a positive coefficient of temperature, the most common of which a negative coefficient or thermistor sensor.…”

Section: Related Workmentioning

confidence: 99%

Challenges and Limitation Analysis of an IoT-Dependent System for Deployment in Smart Healthcare Using Communication Standards Features

Upadhyay¹,

Kumar

Upadhyay

et al. 2023

Sensors

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The use of IoT technology is rapidly increasing in healthcare development and smart healthcare system for fitness programs, monitoring, data analysis, etc. To improve the efficiency of monitoring, various studies have been conducted in this field to achieve improved precision. The architecture proposed herein is based on IoT integrated with a cloud system in which power absorption and accuracy are major concerns. We discuss and analyze development in this domain to improve the performance of IoT systems related to health care. Standards of communication for IoT data transmission and reception can help to understand the exact power absorption in different devices to achieve improved performance for healthcare development. We also systematically analyze the use of IoT in healthcare systems using cloud features, as well as the performance and limitations of IoT in this field. Furthermore, we discuss the design of an IoT system for efficient monitoring of various healthcare issues in elderly people and limitations of an existing system in terms of resources, power absorption and security when implemented in different devices as per requirements. Blood pressure and heartbeat monitoring in pregnant women are examples of high-intensity applications of NB-IoT (narrowband IoT), technology that supports widespread communication with a very low data cost and minimum processing complexity and battery lifespan. This article also focuses on analysis of the performance of narrowband IoT in terms of delay and throughput using single- and multinode approaches. We performed analysis using the message queuing telemetry transport protocol (MQTTP), which was found to be efficient compared to the limited application protocol (LAP) in sending information from sensors.

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“…Yang et al [ 110 ] developed a flexible thermoelectric nanogenerator (TENG) based on TE-nanowire/poly (3-hexyl thiophene) (P3HT) polymer composite as a thermoelectric material ( Figure 9 d–f). The sensor can be self-powered with body temperature as the energy source, with response time of 17 s, reset time of 9 s, and detection sensitivity of 0.15 k. Tatsuya Nakamura et al [ 111 ] proposed a thin, flexible, polymer PTC sensor with a wide temperature measurement range (25–45 °C). They discussed the characteristics of this new type of sensor from three aspects: the characteristics of single polymer PTC sensor, the characteristics of multi polymer PTC sensor and the thickness characteristic ( Figure 9 a,b).…”

Section: Temperature Monitoringmentioning

confidence: 99%

“… Thermoelectric sensors: ( a ) polymer positive temperature coefficient (PTC) sensor; ( b ) the picture shows the variation of resistance temperature characteristics of the single polymer PTC sensor. The reaction temperature of the sensor varies with the content of octadecyl acrylate from 75% to 100% [ 111 ] © 2016 IEEE; ( c ) the size of the flexible TE device [ 109 ]; ( d ) fixed-area fabrics; ( e ) devices fabricated on flexible Kapton substrate and ( f ) the device attached to the human body [ 110 ]. …”

Section: Figurementioning

confidence: 99%

Recent Progress in Flexible Wearable Sensors for Vital Sign Monitoring

Liu

Bai

et al. 2020

Sensors

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With the development of flexible electronic materials, as well as the wide development and application of smartphones, the cloud, and wireless systems, flexible wearable sensor technology has a significant and far-reaching impact on the realization of personalized medical care and the reform of the consumer market in the future. However, due to the high requirements for accuracy, reliability, low power consumption, and less data error, the development of these potential areas is full of challenges. In order to solve these problems, this review mainly searches the literature from 2008 to May 2020, based on the PRISMA process. Based on them, this paper reviews the latest research progress of new flexible materials and different types of sensors for monitoring vital signs (including electrophysiological signals, body temperature, and respiratory frequency) in recent years. These materials and sensors can help realize accurate signal detection based on comfortable and sustainable observation, and may likely be applied to future daily clothing.

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Development of flexible and wide-range polymer-based temperature sensor for human bodies

Cited by 19 publications

References 9 publications

Conductive Tough Hydrogel for Bioapplications

Conductive Tough Hydrogel for Bioapplications

Challenges and Limitation Analysis of an IoT-Dependent System for Deployment in Smart Healthcare Using Communication Standards Features

Recent Progress in Flexible Wearable Sensors for Vital Sign Monitoring

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