Self-Powered, Non-Toxic, Recyclable Thermogalvanic Hydrogel Sensor for Temperature Monitoring of Edibles

Yang, Kun; Bai, Chenhui; Liu, Boyuan; Liu, Z.; Cui, Xiaojing

doi:10.3390/mi14071327

Cited by 5 publications

(2 citation statements)

References 38 publications

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“…The PLG (PVA-LaGG m -Gly n ) hydrogel is fabricated through a one-pot two-step approach as shown in Figure a. The conventional redox ion couples that are often reported, for instance, Fe 2+/3+ , I – /I 3 – , Co II/III (bpy) 3 , − SO 3/4 2– , − and Sn 2+/4+ have a thermopower of several mV K –1 . Here we choose Fe(CN) 6 3–/4– as a thermogalvanic ion because of its superior output performance.…”

Section: Resultsmentioning

confidence: 99%

Thermoelectric Hydrogel Electronic Skin for Passive Multimodal Physiological Perception

Tian,

Khan,

Zhang

et al. 2024

ACS Sens.

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Electronic skins (e-skins) are being extensively researched for their ability to recognize physiological data and deliver feedback via electrical signals. However, their wide range of applications is frequently restricted by the indispensableness of external power supplies and single sensory function. Here, we report a passive multimodal e-skin for real-time human health assessment based on a thermoelectric hydrogel. The hydrogel network consists of poly(vinyl alcohol)/low acyl gellan gum with [Fe(CN) 6 ] 4−/3− as the redox couple. The introduction of glycerol and Li + furnishes the gel-based e-skin with antidrying and antifreezing properties, a thermopower of 2.04 mV K −1 , fast selfhealing in less than 10 min, and high conductivity of 2.56 S m −1 . As a prospective application, the e-skin can actively perceive multimodal physiological signals without the need for decoupling, including body temperature, pulse rate, and sweat content, in real time by synergistically coupling sensing and transduction. This work offers a scientific basis and designs an approach to develop passive multimodal e-skins and promotes the application of wearable electronics in advanced intelligent medicine.

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Section: Resultsmentioning

confidence: 99%

Thermoelectric Hydrogel Electronic Skin for Passive Multimodal Physiological Perception

Tian,

Khan,

Zhang

et al. 2024

ACS Sens.

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“…The sensors need to be able to capture the wearer’s movements or changes in environmental humidity, temperature, etc. and convert them into electrical signals [ 6 , 7 , 8 ]. And they should be able to adhere to the wearer’s skin, which requires good biocompatibility of the sensor substrate.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Adaptive Dual-Network MXene Nanocomposite Hydrogel as Flexible Wearable Strain Sensors

et al. 2023

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Flexible electronic devices and conductive materials can be used as wearable sensors to detect human motions. However, the existing hydrogels generally have problems of weak tensile capacity, insufficient durability, and being easy to freeze at low temperatures, which greatly affect their application in the field of wearable devices. In this paper, glycerol was partially replaced by water as the solvent, agar was thermally dissolved to initiate acrylamide polymerization, and MXene was used as a conductive filler and initiator promoter to form the double network MXene-PAM/Agar organic hydrogel. The presence of MXene makes the hydrogel produce more conductive paths and enforces the hydrogel’s higher conductivity (1.02 S·m−1). The mechanical properties of hydrogels were enhanced by the double network structure, and the hydrogel had high stretchability (1300%). In addition, the hydrogel-based wearable strain sensor exhibited good sensitivity over a wide strain range (GF = 2.99, 0–200% strain). The strain sensor based on MXene-PAM/Agar hydrogel was capable of real-time monitoring of human movement signals such as fingers, wrists, arms, etc. and could maintain good working conditions even in cold environments (−26 °C). Hence, we are of the opinion that delving into this hydrogel holds the potential to broaden the scope of utilizing conductive hydrogels as flexible and wearable strain sensors, especially in chilly environments.

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Thermoelectric Materials and Devices for Advanced Biomedical Applications

Jia,

Ma,

Gao

et al. 2024

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Thermoelectrics (TEs), enabling the direct conversion between heat and electrical energy, have demonstrated extensive application potential in biomedical fields. Herein, the mechanism of the TE effect, recent developments in TE materials, and the biocompatibility assessment of TE materials are provided. In addition to the fundamentals of TEs, a timely and comprehensive review of the recent progress of advanced TE materials and their applications is presented, including wearable power generation, personal thermal management, and biosensing. In addition, the new‐emerged medical applications of TE materials in wound healing, disease treatment, antimicrobial therapy, and anti‐cancer therapy are thoroughly reviewed. Finally, the main challenges and future possibilities are outlined for TEs in biomedical fields, as well as their material selection criteria for specific application scenarios. Together, these advancements can provide innovative insights into the development of TEs for broader applications in biomedical fields.

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Self-Powered, Non-Toxic, Recyclable Thermogalvanic Hydrogel Sensor for Temperature Monitoring of Edibles

Cited by 5 publications

References 38 publications

Thermoelectric Hydrogel Electronic Skin for Passive Multimodal Physiological Perception

Thermoelectric Hydrogel Electronic Skin for Passive Multimodal Physiological Perception

Low-Temperature Adaptive Dual-Network MXene Nanocomposite Hydrogel as Flexible Wearable Strain Sensors

Thermoelectric Materials and Devices for Advanced Biomedical Applications

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