High-strength and highly electrically conductive hydrogels for wearable strain sensor

Zhang, Yu; Li, Mengyu; Han, Xin; Fan, Zewen; Zhang, Huihui; Li, Qiaoling

doi:10.1016/j.cplett.2021.138437

Cited by 38 publications

(27 citation statements)

References 47 publications

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“…They are an ideal choice for developing the next generation of flexible wearable sensors. 38 The mechanical properties (toughness, extensibility, and fluidity) of hydrogels can be adjusted during synthesis so that the hydrogels can be used in wearable electronic devices. 37…”

Section: New Recyclable Materialsmentioning

confidence: 99%

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Recent progress in the fabrication of flexible materials for wearable sensors

et al. 2022

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Section: New Recyclable Materialsmentioning

confidence: 99%

“…33 At the same time, great progress has been made in the application of conductive hydrogels in wearable flexible sensors. 34–38 Hydrogels are expected to be the most promising flexible material to replace traditional sensors.…”

Section: Introductionmentioning

confidence: 99%

Recent progress in the fabrication of flexible materials for wearable sensors

et al. 2022

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“…The electrical conductivity of hydrogel is one of the most important properties of hydrogels used in wearable devices [58,59]. The electrochemical impedance spectra (EIS) of the pAMAL-based hydrogels were measured by an electrochemical workstation.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Alkyl Chain Length Effects of Imidazolium Ionic Liquids on Electrical and Mechanical Performances of Polyacrylamide/Alginate-Based Hydrogels

Chen

Wang

et al. 2021

Gels

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Conductive hydrogels with stretchable, flexible and wearable properties have made significant contributions in the area of modern electronics. The polyacrylamide/alginate hydrogels are one of the potential emerging materials for application in a diverse range of fields because of their high stretch and toughness. However, most researchers focus on the investigation of their mechanical and swelling behaviors, and the adhesion and effects of the ionic liquids on the conductivities of polyacrylamide/alginate hydrogels are much less explored. Herein, methacrylated lysine and different alkyl chain substituted imidazole-based monomers (IMCx, x = 2, 4, 6 and 8) were introduced to prepare a series of novel pAMAL-IMCx-Ca hydrogels. We systematically investigated their macroscopic and microscopic properties through tensile tests, electrochemical impedance spectra and scanning electron microscopy, as well as Fourier transform infrared spectroscopy, and demonstrated that an alkyl chain length of the IMCx plays an important role in the designing of hydrogel strain sensors. The experiment result shows that the hexyl chains of IMC6 can effectively entangle with LysMA through hydrophobic and electrostatic interactions, which significantly enhance the mechanical strength of the hydrogels. Furthermore, the different strain rates and the durability of the pAMAL-IMC6-Ca hydrogel were investigated and the relative resistance responses remain almost the same in both conditions, making it a potential candidate for wearable strain sensors.

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“…As a classic two-dimensional nanomaterial, graphene oxide (GO) is often used as a nanofiller to improve the mechanical strength of hydrogel materials. [11][12][13] For instance, Wu et al prepared a nanocomposite hydrogel composed of poly(acrylamide) (PAAm), N, N-isopropyldiacrylamide and GO. 13 Owing to the introduction of GO, the breaking strength of the hydrogel reached a value of up to 45 kPa.…”

Section: Introductionmentioning

confidence: 99%