Polymerizable deep eutectic solvent-based mechanically strong and ultra-stretchable conductive elastomers for detecting human motions

Zhang, Kaili; Li, Ren’ai; Chen, Guangxue; Yang, Jimin; Tian, Junfei; He, Mengchang

doi:10.1039/d0ta11508h

Cited by 86 publications

(57 citation statements)

References 51 publications

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“…Next, we demonstrate the body movement monitoring of the hybrid sensor due to its good adhesion to skins. [ 55,56 ] As shown in Figure 7g, the sensor can confirm and deform synchronously with different body parts. Using finger movement as an example, we show that the sensor can precisely detect the bending motion with different angles (30°, 60°, and 90°) and convert the motions into electric signals (Figure 7h).…”

Section: Resultsmentioning

confidence: 99%

Tough, Instant, and Repeatable Adhesion of Self‐Healable Elastomers to Diverse Soft and Hard Surfaces

Zan

Tang

et al. 2022

Advanced Science

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Repeatability and high adhesion toughness are usually contradictory for common polymer adhesives. Repeatability requires temporary interactions between the adhesive and the substrate, while high adhesion toughness is usually achieved by permanent bonding. Integrating these two features into one adhesive system is still a daunting challenge. Here, the development of a series of viscoelastic elastomers composed of a soft and hard segment is reported, which exhibit tough, instant, yet repeatable adhesion to a variety of soft and hard surfaces. Such a combination of mutually exclusive properties is attributed to the synergy of high mobility of polymer chains and massive viscoelastic dissipation of the elastomers around the interface. By optimizing the relaxation time and mechanical dissipation, the resulting adhesives can achieve a tough yet repeatable adhesion toughness above 2000 J m −2 , superior to the best‐in‐class commercial adhesives. Numerous acrylate monomers are proven applicable to the preparation of such adhesives, validating the universality of the fabrication method. The application of these elastomers as adhesive and protective layers in soft electronics by virtue of their universal and tough adhesion to various soft and hard substrates is also demonstrated.

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Section: Resultsmentioning

confidence: 99%

Tough, Instant, and Repeatable Adhesion of Self‐Healable Elastomers to Diverse Soft and Hard Surfaces

Zan

Tang

et al. 2022

Advanced Science

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“…25 Thus, a number of flexible sensors based on a DES gel (eutectogel) have also been developed. 26,27 However, the existing eutectogel sensors still have some issues to be solved, such as poor mechanical properties and an antifatigue capability. In practical application, fatigue of these sensors caused by repeated deformation will affect sensitivity and stability, consequently shortening their service life.…”

Section: ■ Introductionmentioning

confidence: 99%

A Highly Conductive, Self-Recoverable, and Strong Eutectogel of a Deep Eutectic Solvent with Polymer Crystalline Domain Regulation

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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It is desirable to fabricate an antifatigue gel for skin-mimicking sensors on the demand of long-term durability in practical usage. Here, we developed a physically cross-linked eutectogel based on a poly(vinyl alcohol)/ poly(acrylic acid) (PVA/PAA) binary polymer skeleton and a deep eutectic solvent (DES). In this eutectogel, uniformly distributed PVA crystalline domains acted as stable physical cross-linkers, and high-density hydrogen bonds possessed great reversibility. Such a polymer network structure was expected to endow this eutectogel with excellent mechanical strength, stretchability, and a self-recovery ability. Specifically, this eutectogel exhibited a superior tensile strength of 2.6 MPa, a fracture strain of 680%, and a fracture toughness of 8.39 MJ m −3 . In cyclic stretching/releasing tests with a fixed strain of 100%, this eutectogel could recover its mechanical properties within a 600 s resting time. Based on this selfrecoverable eutectogel, a reliable flexible sensor was fabricated, which possessed good sensitivity and stability over a wide strain range (1−300%). More importantly, the flexile sensor was able to maintain a highly repeatable response signal during 1000 consecutive stretching/releasing cycles, showing outstanding long-term durability. Given the excellent sensing performance, this eutectogel has promising potential in wearable electronics, human−machine systems, and soft robotics.

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“…In addition to organic ionic liquids, some inorganic salts and eutectic electrolytes could also serve as ionic carriers and be used to prepare nonvolatile quasi-solid ionic conductors. , Table summarizes some bioinspired quasi-solid ionic conductors and their mechanical and ionic properties.…”

Section: Methodsmentioning

confidence: 99%

Bioinspired Quasi-Solid Ionic Conductors: Materials, Processing, and Applications

Lei

2021

Acc. Mater. Res.

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Conspectus Human–machine interactions in the era of the Internet of Things call for the development of intelligent bionic materials. Inspired by the biological tissues’ macromolecular networks and ionic signals, quasi-solid ionic conductors, including artificial hydrogels and nonvolatile ionic elastomers, have attracted increasing interest as a promising candidate to facilitate the human–machine interactions. Benefiting from many bionic features such as biocompatibility, softness, and ionic conductivity, the quasi-solid ionic conductors evolve various functions and achieve a broad scope of applications. This Account highlights the recent progress of bioinspired quasi-solid ionic conductors as a versatile platform for human–machine interactions. It covers topics ranging from materials, processing, and applications to future opportunities and challenges. We begin by introducing bioinspired concepts and the history of artificial ionic conductors. Then, we discuss the optimization of quasi-solid ionic conductors in terms of mechanical performance, sensory capabilities, optical properties, and environmental stability. Afterward, we introduce processing methods and discuss the integration possibility and recyclability of quasi-solid ionic conductors. Next, we show the human–machine interactions enabled by the quasi-solid ionic conductors, including skin-like sensors, theranostic patches, and ionic power supplies. In the end, we describe the exciting future of integrated artificial ionic systems and briefly discuss opportunities in bioinspired designs and practical applications of the quasi-solid ionic conductors.

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Polymerizable deep eutectic solvent-based mechanically strong and ultra-stretchable conductive elastomers for detecting human motions

Abstract: Polymerizable deep eutectic solvent-based mechanically strong and ultra-stretchable conductive elastomers were reported.

Cited by 86 publications

References 51 publications

Tough, Instant, and Repeatable Adhesion of Self‐Healable Elastomers to Diverse Soft and Hard Surfaces

Tough, Instant, and Repeatable Adhesion of Self‐Healable Elastomers to Diverse Soft and Hard Surfaces

A Highly Conductive, Self-Recoverable, and Strong Eutectogel of a Deep Eutectic Solvent with Polymer Crystalline Domain Regulation

Bioinspired Quasi-Solid Ionic Conductors: Materials, Processing, and Applications

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