A conductive hydrogel based on nature polymer agar with self-healing ability and stretchability for flexible sensors

Nie, Zhen; Peng, Kelin; Lin, Lizhi; Yang, Jueying; Cheng, Zhekun; Gan, Qiang; Chen, Yu; Feng, Changgen

doi:10.1016/j.cej.2022.139843

Cited by 55 publications

(32 citation statements)

References 42 publications

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“…In the PVA and PVA/EG spectra, the stretching vibration absorption peak of O-H is shown at 3420 cm −1 ( Figure 4 ), which has a broad peak shape due to the presence of hydrogen bonding conduction. The stretching vibration absorption peak of O-H in-plane deformation and the stretching vibration absorption peak of C-O are shown at 1430 cm −1 and 1070 cm −1 , respectively [ 43 ]. However, based on the PVA and PVA/EG spectra, the PVA/EG/PAM and PVA/EG/PAM/MXene spectra showed distinct PAM characteristic peaks, such as the N-H symmetric, antisymmetric stretching vibration absorption peaks of the primary amine group at 3400~3150 cm −1 , the C-N stretching vibration absorption peak at 1050 cm −1 , the C=O stretching vibration absorption peak at 1700 cm −1 , and the C=C stretching vibration absorption peak near 1500 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Flexible Stretchable, Dry-Resistant MXene Nanocomposite Conductive Hydrogel for Human Motion Monitoring

Liu

Gui

et al. 2023

Polymers

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Conductive hydrogels with high electrical conductivity, ductility, and anti-dryness have promising applications in flexible wearable electronics. However, its potential applications in such a developing field are severely hampered by its extremely poor adaptability to cold or hot environmental conditions. In this research, an “organic solvent/water” composite conductive hydrogel is developed by introducing a binary organic solvent of EG/H2O into the system using a simple one-pot free radical polymerization method to create Ti3C2TX MXene nanosheet-reinforced polyvinyl alcohol/polyacrylamide covalently networked nanocomposite hydrogels (PAEM) with excellent flexibility and mechanical properties. The optimized PAEM contains 0.3 wt% MXene has excellent mechanical performance (tensile elongation of ~1033%) and an improved modulus of elasticity (0.14 MPa), a stable temperature tolerance from −50 to 40 °C, and a high gauge factor of 10.95 with a long storage period and response time of 110 ms. Additionally, it is worth noting that the elongation at break at −40 °C was maintained at around 50% of room temperature. This research will contribute to the development of flexible sensors for human-computer interaction, electronic skin, and human health monitoring.

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Section: Resultsmentioning

confidence: 99%

Flexible Stretchable, Dry-Resistant MXene Nanocomposite Conductive Hydrogel for Human Motion Monitoring

Liu

Gui

et al. 2023

Polymers

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“…The obtained agar/borax/MXene hydrogel displays the excellent strength and elongation of 129 kPa and 105.1%. The self-healed strain sensor assembled with the agar/borax/MXene hydrogel exhibits a wide strain detection range from 0 to 100%, high sensitivity (GF ≈ 1.520), and good stability and can serve as green flexible sensors with high sensitivity and good mechanical properties . Although these double cross-linked hydrogels demonstrate enhanced healing properties over corresponding single cross-linked hydrogels, the mechanical and sensing properties do not improve as significantly as expected, especially after multiple self-healing.…”

Section: Introductionmentioning

confidence: 92%

Ultrastretchable, Multihealable, and Highly Sensitive Strain Sensor Based on a Double Cross-Linked MXene Hydrogel

Yang

Cheng

et al. 2023

ACS Appl. Mater. Interfaces

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The ability of a flexible strain sensor to directly adapt the complicated human biological motion or combined gestures and remotely control the artificial intelligence robotics could benefit the wearable electronics such as intelligent robotics and patient healthcare. However, it is a challenge for the flexible strain sensor to simultaneously achieve high sensing performances and stretchability and long sustainability under various deformation stress or damage. Herein, a dual-cross-linked poly(acrylic acid− stearyl methacrylate)/MXene [P(AA−SMA)M] hydrogel with enhanced mechanical stretchability and self-healability is fabricated by importing reversible coordination and hydrophobic interaction into polymer networks. As a result, the hydrogel film not only exhibits high tensile strength (525 kPa) and stretchability (∼2600%) but also achieves repetitive healable property with 843% elongation even after the 20th broken/self-healing cycle. More importantly, the resultant strain sensor delivers a low detection limit, wide sensing range, fast response time, and repeatability of 1000 cycles even after repeated self-healing. So, the sensor can monitor subtle human motions and recognize different handwriting and gestures, which reveals potential applications toward health-care devices, flexible electronics, and human−machine interfacing.

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“…This makes it easier to use MXene-based hydrogels for wearable electronic applications. MXene-based hydrogels are also highly stretchable and possess self-healable properties [ 141 ], which is fundamental to EL device fabrication.…”

Section: Hydrogels For El Device Fabricationmentioning

confidence: 99%

Recent Progress in Self-Healable Hydrogel-Based Electroluminescent Devices: A Comprehensive Review

Tadesse

Lübben

2023

Gels

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Flexible electronics have gained significant research attention in recent years due to their potential applications as smart and functional materials. Typically, electroluminescence devices produced by hydrogel-based materials are among the most notable flexible electronics. With their excellent flexibility and their remarkable electrical, adaptable mechanical and self-healing properties, functional hydrogels offer a wealth of insights and opportunities for the fabrication of electroluminescent devices that can be easily integrated into wearable electronics for various applications. Various strategies have been developed and adapted to obtain functional hydrogels, and at the same time, high-performance electroluminescent devices have been fabricated based on these functional hydrogels. This review provides a comprehensive overview of various functional hydrogels that have been used for the development of electroluminescent devices. It also highlights some challenges and future research prospects for hydrogel-based electroluminescent devices.

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A conductive hydrogel based on nature polymer agar with self-healing ability and stretchability for flexible sensors

Cited by 55 publications

References 42 publications

Flexible Stretchable, Dry-Resistant MXene Nanocomposite Conductive Hydrogel for Human Motion Monitoring

Flexible Stretchable, Dry-Resistant MXene Nanocomposite Conductive Hydrogel for Human Motion Monitoring

Ultrastretchable, Multihealable, and Highly Sensitive Strain Sensor Based on a Double Cross-Linked MXene Hydrogel

Recent Progress in Self-Healable Hydrogel-Based Electroluminescent Devices: A Comprehensive Review

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