Preparation of stretchable and self-healable dual ionically cross-linked hydrogel based on chitosan/polyacrylic acid with anti-freezing property for multi-model flexible sensing and detection

Liang, Yongzhi; Shen, Yi; Sun, Xingyue; Liang, Haiyi

doi:10.1016/j.ijbiomac.2021.10.060

Cited by 42 publications

(26 citation statements)

References 48 publications

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“…Conductive fillers conclude metal materials (nanoparticles, − nanowires, ,− etc , carbon nanotubes, ,,, graphene oxide, etc. , ), new two-dimension materials (MXene), ,− and conductive polymers. − …”

Section: Introductionmentioning

confidence: 99%

Silver Nanowire/Silver/Poly(dimethylsiloxane) as Strain Sensors for Motion Monitoring

Zhang

Liu

et al. 2022

ACS Appl. Nano Mater.

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Stretchable resistive sensors attract wide attention due to their feasible fabrication method and promising application prospect, while the sensitivity (gauge factor (GF)) and response time for quick and effective response in working are very important for stretchable resistive sensors. Herein, a facile method combined with solution coating and laser direct writing is promoted to fabricate a silver nanowire/silver/poly(dimethylsiloxane) (AgNW/Ag/PDMS) strain sensor. The reduced Ag welds the AgNWs to make the conductive layer robust for deformation, and the obtained stretchable resistive sensor has a high GF of 623.2, a short response time of 51 ms, a recovery time of 50 ms, a wide sensing range beyond 35%, and good cyclic repeatability (over 2000 times). The sensor features highly sensitive and stable performance for monitoring diverse human and mechanical motions, demonstrating a promising and attractive application for wearable devices and human–machine interaction.

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Section: Introductionmentioning

confidence: 99%

Silver Nanowire/Silver/Poly(dimethylsiloxane) as Strain Sensors for Motion Monitoring

Zhang

Liu

et al. 2022

ACS Appl. Nano Mater.

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“…Wu and co-workers successfully constructed a series of multifunctional soft gel polymers based on different biological macromolecules, which could serve as stretchable, highly sensitive, and environmentally-tolerant gas sensors with wireless operation. − Notably, κ-carrageenan (κ-CG) as a biomacromolecule is a linear sulfated polysaccharide extracted from natural seaweed and possesses superior biocompatibility, nontoxicity, and excellent gel-forming capabilities, which is also regarded as a promising material to improve the toughness of hydrogels. , For instance, Tao et al reported a tactile hydrogel sensor based on a micropyramid-patterned double-network ionic hydrogel consisting of carrageenan and PAM chains, which exhibited fascinating application prospects in flexible electronics . Additionally, previous studies have suggested that adding metal ions into hydrogels containing poly(acrylic acid) chains is also an effective strategy to further enhance their mechanical properties. − The added metal ions can form strong coordination bond interactions with the carboxyl groups onto poly(acrylic acid) chains, which remarkably increase the cross-linking densities of hydrogel networks and endow the resulting hydrogel with excellent stretchability and robustness.…”

Section: Introductionmentioning

confidence: 99%

A κ-Carrageenan-Containing Organohydrogel with Adjustable Transmittance for an Antifreezing, Nondrying, and Solvent-Resistant Strain Sensor

Zheng

Gao

et al. 2022

Biomacromolecules

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Gel polymers are widely used in different fields due to their unique properties, especially in flexible electronic devices. However, developing multienvironmentally-tolerant (antifreezing, antidrying, and solvent-resistant) gel polymer-based soft electronics is still a significant challenge. Herein, a binary solvent system-based versatile organohydrogel is designed and successfully prepared, which exhibits superior stretchability, favorable self-adhesive properties, prominent temperature tolerance, and excellent solvent-resistant capabilities. Furthermore, the as-assembled organohydrogel-based sensor demonstrates a satisfied sensitivity (GF = 1.8), wide strain range (5–500%), and outstanding human motion detection. Meanwhile, the obtained organohydrogel can also serve as an all-weather sensor for achieving precise and reliable mechanical sensing in a wide temperature range from −50 to 50 °C and diverse liquid media consisting of water, toluene, and carbon tetrachloride. Interestingly, the organohydrogel displays a repeatable transmittance change behavior in water and dimethyl sulfoxide, based on this feature, which could realize the functional applications for recording and erasing information. It is envisioned that these superior performances render the as-prepared organohydrogel suitable to develop future advanced soft electronics with multienvironmental tolerance.

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“…Compared to these aggregationcausing conducting components, incorporating salt ions into hydrogels is thought to be a better choice for high mechanical properties. [30,31] Moreover, soluble metal salts endow with hydrogels outstanding electrical conductivity and cause a salting-out effect [32] in their networks, which improves mechanical properties. Yang [33] prepared ionic conductive hydrogels by introducing sodium citrate, which provided excellent mechanical properties, electrical conductivity, and low-temperature resistance to the hydrogels.…”

Section: Introductionmentioning

confidence: 99%

High strength, anti‐freezing, and conductive poly(vinyl alcohol)/urea ionic hydrogels as soft sensor

Guo²,

et al. 2022

Polymer Engineering & Sci

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Hydrogel‐based sensors with excellent flexibility and stretchability have received extensive attention. However, fabricating anti‐freezing, high‐strength, and conductive hydrogel‐based sensors remains a significant challenge. A stretchable sensor with high strength and anti‐freezing herein is constructed using poly(vinyl alcohol)/urea (PVA/urea) ionic hydrogels. The PVA/urea ionic hydrogels were prepared by a simple strategy of soaking the freeze–thawed PVA hydrogels in sodium citrate (Na3Cit) water/urea aqueous solutions. The presence of Na3Cit in the hydrogel produces hydrophobic aggregation, endowing the PVA/urea ionic hydrogel with high mechanical properties (~1.51 MPa) and makes the hydrogel have high strain gauge factors (GF = 1.94). The synergistic effect of Na3Cit and urea endows the PVA/urea ionic hydrogel with anti‐freezing properties (~−20°C). The obtained sensors have excellent stability (100 cycles at ε = 85%) and could detect various human activities even at −20°C. More importantly, joint motion can be monitored wirelessly via Bluetooth at −20°C. This work provides a feasible method to construct anti‐freezing, high‐strength, and conductive hydrogel. It paves the way for versatile applications in human‐motion detection, intelligence device, and biomimetic skin.

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Preparation of stretchable and self-healable dual ionically cross-linked hydrogel based on chitosan/polyacrylic acid with anti-freezing property for multi-model flexible sensing and detection

Cited by 42 publications

References 48 publications

Silver Nanowire/Silver/Poly(dimethylsiloxane) as Strain Sensors for Motion Monitoring

Silver Nanowire/Silver/Poly(dimethylsiloxane) as Strain Sensors for Motion Monitoring

A κ-Carrageenan-Containing Organohydrogel with Adjustable Transmittance for an Antifreezing, Nondrying, and Solvent-Resistant Strain Sensor

High strength, anti‐freezing, and conductive poly(vinyl alcohol)/urea ionic hydrogels as soft sensor

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