A transparent and adhesive carboxymethyl cellulose/polypyrrole hydrogel electrode for flexible supercapacitors

Cheng, Ya; Ren, Xiuyan; Duan, Lijie; Gao, Guanghui

doi:10.1039/d0tc01039a

Cited by 88 publications

(45 citation statements)

References 77 publications

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“…Scanning electron microscopy (SEM) analysis was carried out to understand the internal morphology of the hydrogel films. Due to the presence of CMC, C/P could be uniformly dispersed in the hydrogel film and form hydrogen bonds . As shown in Figures b and S1, PPy had a clear and uniform particle morphology and was well-dispersed in the hydrogel film system .…”

Section: Resultsmentioning

confidence: 94%

“…The tested mechanical properties include tensile properties, fatigue resistance, and other related properties to obtain the modulus, fracture strength, fracture strain, and other performance parameters of the hydrogel film material. The definition of the elastic modulus was the slope of the stress–strain curve in the range of 0–20% strain, and toughness was defined as the integral region of the unidirectional stress–strain extension curve. ,, …”

Section: Methodsmentioning

confidence: 99%

“…By building noncovalent synergistic effects such as hydrogen bonding and π–π stacking between networks, a variety of excellent properties of hydrogel films can be achieved simultaneously, such as an ultrathin structure, good flexibility, high toughness, antifriction properties, and swelling resistance properties. Furthermore, the hydrogel film appears to be transparent due to its special structure and exhibits UV resistance due to the existence of polypyrrole . Significantly, the unique ultrathin structure and excellent mechanical properties of hydrogel films encourage more applications of hydrogels in biosensing devices, electronic skin, intelligent robots, bioelectronic interfaces, and so forth.…”

Section: Introductionmentioning

confidence: 99%

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Ultrathin and Highly Tough Hydrogel Films for Multifunctional Strain Sensors

Zhang

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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With good flexibility and biocompatibility, hydrogel-based sensors have been widely used in human motion detection, artificial intelligence, human–machine interface, and other fields. Previous research on hydrogel-based sensors has focused on improving the mechanical properties and signal transmission sensitivity. With the development of human smart devices, there is an increasing demand for hydrogel sensor comfort and more application functions, such as ultrathin structures and recognition functions for contact surfaces, which are realized with higher requirements for the thickness, flexibility, friction resistance, and biocompatibility of hydrogels. Inspired by the ultrathin and flexible characteristics of human organ biofilms, we constructed conductive hydrogel films by using the flim-casting and glycerol–H2O secondary hydration methods. This ultrathin structure enables the hydrogel films to have a high elongation at break of 523.3%, a stress of 3.5 MPa, and a good friction resistance. Combined with the excellent sensing properties (gauge factor = 2.1 and a response time of 200 ms), the hydrogel film-based sensor can not only record human motion signals but also recognize the surface texture and roughness of objects, such as glass, brushes, wood, and sandpaper with mesh sizes of 80, 50, and 24, accurately. In addition, this hydrogel film has a series of excellent properties such as UV shielding, antiswelling ability, and good biocompatibility. This research provides a novel way for the development of emerging soft-material smart devices, such as hydrogel-based electronic skin and soft robots.

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Section: Resultsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultrathin and Highly Tough Hydrogel Films for Multifunctional Strain Sensors

Zhang

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…[9][10][11][12][13][14] DOI: 10.1002/macp.202100165 However, in practical applications, conductive hydrogels are limited by mechanical properties, especially for conductive hydrogels with intrinsic conductive polymers as key components. [15] Recently, conductive polymers, such as polyaniline (PANI), [16,17] polypyrrole (PPY), [18,19] and polythiophene (PTH) [20,21] have been successfully utilized to construct various CHs with stable networks. However, the flexibility of conductive hydrogels is severely limited.…”

Section: Introductionmentioning

confidence: 99%

Stretchable Zwitterionic Conductive Hydrogels with Semi‐Interpenetrating Network Based on Polyaniline for Flexible Strain Sensors

Chen

Hao

et al. 2021

Macro Chemistry & Physics

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Stretchable conductive hydrogels are of great significance in wearable electronic devices and tissue engineering scaffolds. In this paper, the zwitterionic polymer network hydrogels are synthesized by radical co-polymerizing acrylic acid (AA) and methyl acryloyl oxygen ethyl trimethyl ammonium chloride (DMC) in aniline (ANI) aqueous solution followed by oxidation polymerization of ANI to form semi-interpenetrating network hydrogel. The conductive hydrogels are endowed excellent mechanical properties by synergistic effect of electrostatic interaction and hydrogen bonding between the interpenetrating network of PANI and P(AA-co-DMC). The tensile strength reaches up to 0.173 MPa at 576% and the compression strength reaches up to 0.73 MPa at 80%. Meanwhile, the zwitterions and polyaniline ensure hydrogels to obtain conductivity (0.428 s m −1 ). In addition, the as-prepared conductive hydrogels can also be used as ionic skin to accurately monitor various movements of the human body, showing its potential applications in wearable devices and flexible electronic devices.

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“…[1][2][3][4] Owing to the stable and robust properties of wet/underwater adhesion to various substrates, these materials are playing vital roles of tissue adhesion, 5,6 biomedical coatings, 7 drug-delivery systems, 8 and even energy field. 9 Traditional commercially available adhesives, such as epoxy resins, 10 polyurethanes 11 and cyanoacrylate-based adhesives 12,13 have been used extensively under wet conditions but have several drawbacks, such as a long curing time, an unstable adhesive force, lack of reusability, and biological toxicity. For example, Natio and coworkers 10 reported epoxy-based adhesives that required a 2 h curing time, where considerably more time was needed to achieve effective adhesion.…”

mentioning

confidence: 99%

Mechanisms and applications of bioinspired underwater/wet adhesives

Cai

Жен

Chen

et al. 2021

Journal of Polymer Science

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In nature, many organisms can effectively fix to contact substrates and move and prey in complex living environments, such as underwater, seawater, and tidal environments, owing to special secreted chemical components and/or special micro/nanostructures on the adhesive surface of these organisms.Inspired by the adhesive performance of organisms, extensive research related to adhesive components and adhesive surfaces has been conducted recently.To better understand the underlying adhesive mechanisms and facilitate further continuous inspiration, a brief overview of recent wet/underwater adhesive materials is provided herein. First, the adhesive processes and underlying mechanisms of commonly researched organisms, such as mussels, octopuses, clingfish, and tree frogs, are discussed, and the corresponding bioinspired artificial adhesives are presented. Then, the applications of these bioinspired adhesives, such as intelligent robots (signal monitoring and sensing devices), wearable devices (including wet climbing and electronic skin), biomedicines (including wound dressings, bone adhesion, and rapid hemostasis), are presented and summarized. Finally, we offer our perspective on the future challenges and development of bioinspired artificial adhesives. K E Y W O R D S adhesive surfaces, applications, artificial components, natural organisms 1 | INTRODUCTION Recently, the development of wet/underwater adhesives inspired by natural organisms has attracted increasing attention and achieved significant progress based on various Chao Cai and Zhen Chen contributed equally to this work

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A transparent and adhesive carboxymethyl cellulose/polypyrrole hydrogel electrode for flexible supercapacitors

Abstract: The transparent, UV-shielding and adhesive carboxymethyl cellulose/polypyrrole hydrogel was designed to develop the flexible supercapacitor electrode.

Cited by 88 publications

References 77 publications

Ultrathin and Highly Tough Hydrogel Films for Multifunctional Strain Sensors

Ultrathin and Highly Tough Hydrogel Films for Multifunctional Strain Sensors

Stretchable Zwitterionic Conductive Hydrogels with Semi‐Interpenetrating Network Based on Polyaniline for Flexible Strain Sensors

Mechanisms and applications of bioinspired underwater/wet adhesives

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