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Gels
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Hydrogel for Wearable Sensing Applications
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Hydrogel for Wearable Sensing Applications

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Applications".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 5619

Special Issue Editors

Dr. Hao Liu

E-Mail Website
Guest Editor
Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an 710049, China
Interests: soft matter mechanics; hydrogels; soft biosensors
Dr. Moxiao Li

E-Mail Website
Guest Editor
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: soft matter mechanics; soft hydraulics

Special Issue Information

Dear Colleagues,

The increasingly hot topic of wearable sensors has been captivating interest from a multitude of applications in personal healthcare, soft robotics and human-machine interaction. The latest advances in materials innovation have come up with an ideal candidate (i.e., hydrogels) enabling wearable sensing with high conformability, tough adhesion and low impedance, benefiting from the many superiorities of the jelly-like material. From basic modifications to make hydrogels stretchy or adhesive to fascinating demonstrations of wearable functionality even at elevated or sub-zero temperatures, we have witnessed the ongoing development of wearable hydrogel sensors in recent years. Many more efforts on innovative materials, integrated functionality and mechanical designs are still needed to take such lab-made prototypes a step closer to real-life applications.

Thus, this Special Issue on “Hydrogel for Wearable Sensing Applications” aims to collect up-to-date advances in the broad subject area of hydrogel-based wearable sensing. Your cutting-edge work on hydrogel electronics, hydrogel sensors, hydrogel interfaces, the mechanics and adhesion of hydrogels, as well as novel ionogels and organogels will be highly appreciated. We are pleased to invite you to contribute to this Special Issue with original research articles or comprehensive reviews to propel the development of research in hydrogels and wearable sensors forward.

Dr. Hao Liu
Dr. Moxiao Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Gels is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hydrogel electronics
  • hydrogel sensors
  • hydrogel interfaces in wearable sensing
  • mechanics and adhesion of hydrogel in wearable sensing
  • ionogels/organogels in wearable sensing

Published Papers (1 paper)

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Review

31 pages, 7877 KiB  
Review
A Review on Thermal Properties of Hydrogels for Electronic Devices Applications
by Fei Xin and Qiang Lyu
Gels 2023, 9(1), 7; https://doi.org/10.3390/gels9010007 - 23 Dec 2022
Cited by 13 | Viewed by 5159
Abstract
Hydrogels, as a series of three-dimensional, crosslinked, hydrophilic network polymers, exhibit extraordinary properties in softness, mechanical robustness and biocompatibility, which have been extensively utilized in various fields, especially for electronic devices. However, since hydrogels contain plenty of water, the mechanical and electrochemical properties [...] Read more.
Hydrogels, as a series of three-dimensional, crosslinked, hydrophilic network polymers, exhibit extraordinary properties in softness, mechanical robustness and biocompatibility, which have been extensively utilized in various fields, especially for electronic devices. However, since hydrogels contain plenty of water, the mechanical and electrochemical properties are susceptible to temperature. The thermal characteristics of hydrogels can significantly affect the performance of flexible electronic devices. In this review, recent research on the thermal characteristics of hydrogels and their applications in electronic devices is summarized. The focus of future work is also proposed. The thermal stability, thermoresponsiveness and thermal conductivity of hydrogels are discussed in detail. Anti-freezing and anti-drying properties are the critical points for the thermal stability of hydrogels. Methods such as introducing soluble ions and organic solvents into hydrogels, forming ionogels, modifying polymer chains and incorporating nanomaterials can improve the thermal stability of hydrogels under extreme environments. In addition, the critical solution temperature is crucial for thermoresponsive hydrogels. The thermoresponsive capacity of hydrogels is usually affected by the composition, concentration, crosslinking degree and hydrophilic/hydrophobic characteristics of copolymers. In addition, the thermal conductivity of hydrogels plays a vital role in the electronics applications. Adding nanocomposites into hydrogels is an effective way to enhance the thermal conductivity of hydrogels. Full article
(This article belongs to the Special Issue Hydrogel for Wearable Sensing Applications)
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