Chitosan-driven skin-attachable hydrogel sensors toward human motion and physiological signal monitoring

Jin, Rining; Xu, Jiajun; Duan, Lijie; Gao, Guanghui

doi:10.1016/j.carbpol.2021.118240

Cited by 67 publications

(42 citation statements)

References 49 publications

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“…As shown in Figure c, the adhesion strength of DCMC/AG/PAA hydrogels on glass, wood, rubber, metal, nitrile gloves, and skin is 7.5, 12.8, 4.2, 4.6, 11.1, and 17.5 kPa, respectively. The data are similar to the adhesion strength of polyacrylic acid hydrogels reported in the literature, ,, indicating that DCMC/AG/PAA hydrogels have good adhesion to the substrates. The adhesion mechanism between the hydrogel and glass can be explained by the formation of surface tension between water in the hydrogel and glass .…”

Section: Resultssupporting

confidence: 88%

Tough, Repeatedly Adhesive, Cyclic Compression-Stable, and Conductive Dual-Network Hydrogel Sensors for Human Health Monitoring

Ling

Tao

Liu

et al. 2021

Ind. Eng. Chem. Res.

106

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Hydrogel-based flexible wearable devices have attracted wide attention from researchers due to their great potential application in human–computer interaction, electronic skin, and disease diagnosis. However, the preparation of conductive hydrogels integrating good biocompatibility, excellent mechanical (tensile and compressible) properties, self-adhesive properties, cyclic stretching, and compression stability remains a challenge. By the Schiff base reaction between dialdehyde carboxymethyl cellulose and amino gelatin to form the first layer of the network and by the free-radical polymerization of acrylic acid to form the second layer of the network, a multifunctional conductive dual-network (DN) hydrogel strain sensor was prepared. The composite DN hydrogel has excellent compression properties (the strength reached to 0.12 MPa when the hydrogel was compressed to 50% of its original height), good cyclic compression (≥10 000 times), repeatable adhesion (≥10 times), reliable electrical conductivity, and high sensitivity (gauge factor = 8.1). The biocompatible hydrogel can be used not only to monitor human body movement but also to detect the breathing movement of simulated pig lungs in vitro. Furthermore, the conductive hydrogel was creatively made into a plantar pressure sensor similar to an insole to monitor the stress on the sole of a flatfoot patient, providing a new potential material for flatfoot detection and correction.

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Section: Resultssupporting

confidence: 88%

Tough, Repeatedly Adhesive, Cyclic Compression-Stable, and Conductive Dual-Network Hydrogel Sensors for Human Health Monitoring

Ling

Tao

Liu

et al. 2021

Ind. Eng. Chem. Res.

106

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“…Chitosan, which can be cured even at room temper-ature, has been elaborated on in the literature due to its high adhesive and stretching behavior (Figure 6a). [161,162] Its ability to form crosslinks can be used in hydrogel applications like other polysaccharides. It can cross-link directly with carbon nanotubes as filling material or functionalized forms.…”

Section: Chitin and Chitosanmentioning

confidence: 99%

Sustainable Macromolecular Materials in Flexible Electronics

Kılıçarslan

Bozyel

Gökcen

et al. 2022

Macro Materials & Eng

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With advances in electronics, the concept of flexible electronics has left traditional designs behind. Many concepts, such as sensors, transistors, soft robotics, data, and energy storage devices have begun to find more widespread and flexible areas of use. From this point of view, using environmentally friendly, abundant, and renewable natural materials that reduce carbon emissions in the production and disposal of these components is the first step toward the concept of sustainable flexible electronics. This review deals with the integration of sustainable natural materials obtained from plant, animal, and bacterial sources into sensors, displays, data storage, power generation, and soft robotic systems, with appropriate examples compiled from the last ten years. In addition, limitations in the use of sustainable materials as flexible electronic components and their potential for use in innovative electronic applications in the future are foreseen.

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“…The high GF value was comparable to those of recently reported hydrogelbased strain sensors. [76][77][78][79][80][81][82][83] The two different GF values are able to be interpreted according to the tunneling influence and contactresistance effect. [84][85][86] When low strain is applied, carbon nanotubes in the hydrogel sensor are close to each other, and the inter-contacted parts between carbon nanotubes would be reduced with the increase of strain, leading to the improvement of tunneling and contact resistance.…”

Section: Sensing Applications Of Multi-network Hydrogelmentioning

confidence: 99%

Multi‐Network Poly(β‐cyclodextrin)/PVA/Gelatin/Carbon Nanotubes Composite Hydrogels Constructed by Multiple Dynamic Crosslinking as Flexible Electronic Devices

Liu

2021

Macro Materials & Eng

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Multifunctional hydrogels with good stretchability and self-healing properties have attracted considerable attention in the field of flexible electronic devices. However, hydrogels constructed by traditional chemical crosslinking usually have poor mechanical properties and lack self-healing, adhesion, and biocompatibility, which cannot meet the requirements of flexible wearable devices. This work introduced multiple dynamic crosslinking, including borate ester bond, Schiff-base, and host-guest interaction, into polymer networks to fabricate triple-network gelatin/polyvinyl alcohol/carbon nanotube composite hydrogels with good self-healing ability (healing efficiency of 95.0%), mechanical strength (54.6 kPa), stretchability (778%), biocompatibility, conductivity, adhesion, and remodeling properties. Carbon nanotubes can serve as the filler to improve the electrical conductivity of the triple-network hydrogels. The resulting hydrogel can be made into a strain sensor with high strain sensitivity (gauge factor up to 16.0). More importantly, the strain sensor can be used to monitor various human and organ movements. Owing to its good self-healing ability, the self-healed hydrogel sensor also can detect human movements with almost the same electrical signal strength as the original one. This study gives novel insights for the design of multifunctional self-healing hydrogels that have great potential in various application fields such as electronic skins, soft robots, and wearable devices.

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Chitosan-driven skin-attachable hydrogel sensors toward human motion and physiological signal monitoring

Cited by 67 publications

References 49 publications

Tough, Repeatedly Adhesive, Cyclic Compression-Stable, and Conductive Dual-Network Hydrogel Sensors for Human Health Monitoring

Tough, Repeatedly Adhesive, Cyclic Compression-Stable, and Conductive Dual-Network Hydrogel Sensors for Human Health Monitoring

Sustainable Macromolecular Materials in Flexible Electronics

Multi‐Network Poly(β‐cyclodextrin)/PVA/Gelatin/Carbon Nanotubes Composite Hydrogels Constructed by Multiple Dynamic Crosslinking as Flexible Electronic Devices

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