Robust conductive organohydrogel strain sensors with wide range linear sensing, UV filtering, anti-freezing and water-retention properties

Liu, Xinle; Qin, Juhua; Wang, Jing; Chen, Yipeng; Miao, Guohao; Qi, Peiyao; Jiao, Zheng; Liu, Xiaofei

doi:10.1016/j.colsurfa.2021.127823

Cited by 22 publications

(10 citation statements)

References 55 publications

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“…We compared the "ionic conductivity", "residual strain" and "cyclic tensile strain (less than or equal to 200%)" of our organohydrogel and other reported organohydrogels (Fig. S11) [44][45][46][47][48][49][50]. The small residual strain during cyclic tensile tests indicated that our organohydrogel had excellent resilience.…”

Section: Resultsmentioning

confidence: 89%

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Zhu

Song

et al. 2022

Sci. China Mater.

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Stretchable ionic conductors with high transparency and excellent resilience are highly desired for flexible electronics, but traditional ionic conductive hydrogels are easy to dry and freeze. Herein, a newly hybrid crosslinking strategy is presented for preparing a stretchable and transparent hydrogel by using sodium alginate (SA) and acrylamide based on the unique physically and covalently hybrid crosslinking mechanism, which is transformed into organohydrogel by simple solvent replacement. Due to the combination of hybrid crosslinking double network and hydrogen bond interactions introduced by the glycerin-water binary solvent, the SA-poly (acrylamide)-organohydrogel (SPOH) demonstrates excellent anti-freezing (−20°C) property, stability (>2 days), transparency, stretchability (~1600%) and high ionic conductivity (17.1 mS cm −1 ). Thus, a triboelectric nanogenerator made from SPOH (O-TENG) shows an instantaneous peak power density of 262 mW m −2 at a load resistance of 10 MΩ and efficiently harvests biomechanical energy to drive an electronic watch and light-emitting diode. Moreover, The O-TENG exhibits favorable long-term stability (2 weeks) and temperature tolerance (−20°C). In addition, the raw materials can be prepared into SPOH fibers by a simple tubular mold method, exhibiting high transparency, which can be used for laser transmission. The various abilities of the SPOH promise the application of energy harvesting and laser transmission for wearable electronics and biomedical field.

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Section: Resultsmentioning

confidence: 89%

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Zhu

Song

et al. 2022

Sci. China Mater.

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“…14(e)). 55,206 Additionally, the hydrogel showed over 97% antibacterial activity against E. coli and S. aureus bacteria, as measured from optical density (OD) after 12 and 24 h (Fig. 14(g)).…”

Section: Small Biomolecules For Hydrogel-based Strain Sensorsmentioning

confidence: 98%

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Zaidi¹,

Saeed²,

Heo³

et al. 2023

J. Mater. Chem. A

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“…Polyampholytes are charged polymers with zwitterionic groups and stand out from the crowd for their potential for adhesion, conductivity, and improved water retention. , Nevertheless, the “salt-like structure” of polyampholytes usually leads to brittleness. To solve this problem, cellulose nanofibers (CNFs) with excellent mechanical properties and good biocompatibility were introduced into zwitterionic hydrogels, and the mechanical properties of zwitterionic hydrogels were improved by the abundant hydroxyl group content and dynamic interaction with polymers. , …”

Section: Introductionmentioning

confidence: 99%

“…31,36 Nevertheless, the "salt-like structure" of polyampholytes usually leads to brittleness. To solve this problem, cellulose nanofibers (CNFs) with excellent mechanical properties and good biocompatibility were introduced into zwitterionic hydrogels, 37 and the mechanical properties of zwitterionic hydrogels were improved by the abundant hydroxyl group content and dynamic interaction with polymers. 8,9 In this work, a zwitterionic hydrogel with high conductivity, antifreeze, and conformal adhesion was prepared by a one-pot method, which could be gelled within one minute by an autocatalytic enhancement system.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional MXene Conductive Zwitterionic Hydrogel for Flexible Wearable Sensors and Arrays

Guo,

Mai,

Huang

et al. 2023

ACS Appl. Mater. Interfaces

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Conductive hydrogels have good prospects in the fields of flexible electronic devices and artificial intelligence due to their biocompatibility, durability, and functional diversity. However, the process of hydrogel polymerization is time-consuming and energy-consuming, and freezing at zero temperature is inevitable, which seriously hinders its applications and working life. Herein, zwitterionic conductive hydrogels with self-adhesive and antifreeze properties were prepared in one minute by introducing twodimensional (2D) MXene nanosheets into the autocatalytically enhanced system composed of tannic acid-modified cellulose nanofibers and zinc chloride. The system has strong environmental applicability (−60 to 40 °C), good stretchability (ductility ≈ 980%), durable adhesion (even after 30 days of exposure to air), and strong electrical conductivity (20 °C, 30 mS cm −1 ). By virtue of these advantages, the prepared zwitterionic hydrogels can be developed into flexible strain sensors to monitor large human movements and subtle physiological signals over a wide temperature range and to capture signals from handwriting and voice recognition. In addition, multiple flexible sensors can be assembled into a three-dimensional (3D) array, which can detect the magnitude and spatial distribution of strain or force. These results demonstrate that the prepared zwitterionic hydrogels have promising applications in the fields of medical monitoring and artificial intelligence.

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Robust conductive organohydrogel strain sensors with wide range linear sensing, UV filtering, anti-freezing and water-retention properties

Cited by 22 publications

References 55 publications

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Transparent, stretchable and anti-freezing hybrid double-network organohydrogels

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Multifunctional MXene Conductive Zwitterionic Hydrogel for Flexible Wearable Sensors and Arrays

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