Nanocellulose-enhanced organohydrogel with high-strength, conductivity, and anti-freezing properties for wearable strain sensors

Cheng, Yanpeng; Zang, Junjiao; Zhao, Xin; Wang, Hang; Hu, Yingcheng

doi:10.1016/j.carbpol.2021.118872

Cited by 66 publications

(31 citation statements)

References 43 publications

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“…Compared with the existing gel-based sensors, the resulting gel in this work exhibited comprehensive and favorable performance in the mechanical, adhesion properties, electrical conductivity, and sensing in the deformation or temperature (Table S1). ,,− Besides, the gel-based sensor held admirable self-healing and multifaceted sensing performance compared with the commercial sensor, which possessed a broad application prospect.…”

Section: Resultsmentioning

confidence: 99%

Environmentally Stable, Stretchable, Adhesive, and Conductive Organohydrogels with Multiple Dynamic Interactions as High-Performance Strain and Temperature Sensors

Rong

Zhao

Fan

et al. 2022

ACS Appl. Mater. Interfaces

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Nowadays, with the rapid development of artificial intelligence, conductive hydrogel-based sensors play an increasingly vital role in health monitoring and temperature sensing. However, the perfect integration of the environmental stability and applied performance of the hydrogel has always been a challenging and significant problem. Herein, we report an environmentally tolerant, stretchable, adhesive, self-healing conductive gel through multiple dynamic interactions in the water/glycerol/ionic liquids medium, which can be used as a high-performance strain and temperature sensor. The random copolymer poly(acrylic acid-co-acetoacetoxyethyl methacrylate) interacts with the branched poly(ethylene imine) (PEI) and Zr4+ ions via the dynamic covalent enamine bonds, coordinations, and electrostatic interactions to improve stretchable (1300%), compressible, fatigue-resistant (1000 cycles at 50% strain), and self-healing performance (95%, 24 h). The combination of water/glycerol/ionic liquids imparts the resulting gel with excellent electrical conductivity, anti-drying, and anti-freezing performance. By means of the above excellent performance, the gel could be used as the flexible strain or pressure sensor with high sensitivity and stability for the detection of the movement, expression, handwriting, pronouncing, and electrocardiogram (ECG) signals in various models. Meanwhile, the resulting gel can be assembled as the temperature sensor to trace the change of temperature accurately and steadily, which has a wide operating window (0 to 100 °C), an ultralow detection limit (0.2 °C), and high sensitivity (2.1% °C–1). It is believed that the strategy for the multifunction and high-performance gel will blaze a new trail for the smart device in health management, temperature detection, and information transmission under various environmental conditions.

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Section: Resultsmentioning

confidence: 99%

Environmentally Stable, Stretchable, Adhesive, and Conductive Organohydrogels with Multiple Dynamic Interactions as High-Performance Strain and Temperature Sensors

Rong

Zhao

Fan

et al. 2022

ACS Appl. Mater. Interfaces

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“…Therefore, there is a rising interest in developing sensors and sensory systems employing nanocellulosic materials. For example, a nanocellulose improved organo-hydrogel with exceptional strength, impressive conductivity, good transparency, and antifreezing properties for wearable strain sensors is reported . This was achieved using the radical polymerization of polyacrylamide (PAM)/sodium alginate (SA)/TEMPO-oxidized cellulose nanofibrils (TOCNs) in a mixture of dimethyl sulfoxide (DMSO)/Water solution, and subsequently followed by immersion in calcium chloride (CaCl 2 ) solution.…”

Section: Applicationsmentioning

confidence: 99%

Nanocellulosics in Transient Technology

Iroegbu

Ray

2022

ACS Omega

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Envisage a world where discarded electrical/electronic devices and single-use consumables can dematerialize and lapse into the environment after the end-of-useful life without constituting health and environmental burdens. As available resources are consumed and human activities build up wastes, there is an urgency for the consolidation of efforts and strategies in meeting current materials needs while assuaging the concomitant negative impacts of conventional materials exploration, usage, and disposal. Hence, the emerging field of transient technology (Green Technology), rooted in eco-design and closing the material loop toward a friendlier and sustainable materials system, holds enormous possibilities for assuaging current challenges in materials usage and disposability. The core requirements for transient materials are anchored on meeting multicomponent functionality, low-cost production, simplicity in disposability, flexibility in materials fabrication and design, biodegradability, biocompatibility, and environmental benignity. In this regard, biorenewables such as cellulose-based materials have demonstrated capacity as promising platforms to fabricate scalable, renewable, greener, and efficient materials and devices such as membranes, sensors, display units (for example, OLEDs), and so on. This work critically reviews the recent progress of nanocellulosic materials in transient technologies toward mitigating current environmental challenges resulting from traditional material exploration, usage, and disposal. While spotlighting important fundamental properties and functions in the material selection toward practicability and identifying current difficulties, we propose crucial research directions in advancing transient technology and cellulose-based materials in closing the loop for conventional materials and sustainability.

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“…Therefore, it is very important to prepare freeze-resistant polyelectrolyte conductive hydrogels to ensure normal operation under extreme conditions. Adding inorganic salts, organic compounds, or organic solvents to gels is an effective method to reduce the freezing point and improve the frost resistance of hydrogels [57] . Cheng et al prepared an antifreeze hydrogel by polymerizing polyacrylamide (PAM)/SA/2,2,6,6-tetramethylethylpiperidine-1-oxyl radical (TEMPO)-oxidized cellulose nanofibers (TOCNs) in a dimethyl sulfoxide (DMSO)/aqueous solution and then soaking CaCl 2 solution [58] .…”

Section: Freezing Resistancementioning

confidence: 99%

Polyelectrolyte-based conductive hydrogels: from theory to applications

Fan¹,

Chen²,

Sun³

et al. 2022

Soft Sci

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With the continuous development of soft conductive materials, polyelectrolyte-based conductive hydrogels have gradually become a major research hotspot because of their strong application potential. This review first considers the basic conductive theory of hydrogels, which can be divided into the hydrogel structure and zwitterionic enhancing conductivity theories. We then classify polyelectrolyte-based conductive hydrogels into different types, including double, ionic-hydrogen bond, hydrogen bond，and physically crosslinked networks. Furthermore, the mechanical, electrical, and self-healing properties and fatigue and temperature interference resistance of polyelectrolyte-based conductive hydrogels are described in detail. We then discuss their versatile applications in strain sensors, solid-state supercapacitors, visual displays, wound dressings, and drug delivery. Finally, we offer perspectives on future research trends for polyelectrolyte-based conductive hydrogels.

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Nanocellulose-enhanced organohydrogel with high-strength, conductivity, and anti-freezing properties for wearable strain sensors

Cited by 66 publications

References 43 publications

Environmentally Stable, Stretchable, Adhesive, and Conductive Organohydrogels with Multiple Dynamic Interactions as High-Performance Strain and Temperature Sensors

Environmentally Stable, Stretchable, Adhesive, and Conductive Organohydrogels with Multiple Dynamic Interactions as High-Performance Strain and Temperature Sensors

Nanocellulosics in Transient Technology

Polyelectrolyte-based conductive hydrogels: from theory to applications

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