Hydroxypropyl methyl cellulose reinforced conducting polymer hydrogels with ultra-stretchability and low hysteresis as highly sensitive strain sensors for wearable health monitoring

Xu, Linli; Liu, Shide; Zhu, Lei; Liu, Ying; Li, Na; Shi, Xiaojiao; Jiao, Tifeng; Qin, Zhihui

doi:10.1016/j.ijbiomac.2023.123956

Cited by 20 publications

(8 citation statements)

References 43 publications

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“…A property comparison of the resultant hydrogel with the reported ones is made in Table . It can be observed that the hydrogel prepared in this paper has excellent tensile, self-adhesion, self-healing ability, and electrical conductivity and suggests potential application as high-performance wearable strain sensors. − …”

Section: Results and Disscussionmentioning

confidence: 85%

Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Li,

Ren,

Zhang

et al. 2024

Biomacromolecules

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Conductive hydrogels integrate the conductive performance and soft nature, which is like that of human skin. Thus, they are more suitable for the preparation of wearable human-motion sensors. Nevertheless, the integration of outstanding multiple functionalities, such as stretchability, toughness, biocompatibility, self-healing, adhesion, strain sensitivity, and durability, by a simple way is still a huge challenge. Herein, we have developed a multifunctional chitosan/oxidized hyaluronic acid/hydroxypropyl methylcellulose/poly(acrylic acid)/tannic acid/Al 3+ hydrogel (CS/OHA/HPMC/PAA/TA/Al 3+ ) by using a two-step method with hydroxypropyl methylcellulose (HPMC), acrylic acid (AA), tannic acid (TA), chitosan (CS), oxidized hyaluronic acid (OHA), and aluminum chloride hexahydrate (AlCl 3 •6H 2 O). Due to the synergistic effect of dynamic imine bonds between CS and OHA, dynamic metal coordination bonds between Al 3+ and −COOH and/or TA as well as reversible hydrogen, the hydrogel showed excellent tensile property (elongation at break of 3168%) and desirable toughness (0.79 MJ/m 3 ). The mechanical self-healing efficiency can reach 95.5% at 30 min, and the conductivity can recover in 5.2 s at room temperature without stimulation. The favorable attribute of high transparency (98.5% transmittance) facilitates the transmission of the optical signal and enables visualization of the sensor. It also shows good adhesiveness to various materials and is easy to peel off without residue. The resistance of the hydrogel-based sensors shows good electrical conductivity (2.33 S m −1 ), good durability, high sensing sensitivity (GF value of 4.12 under 1600% strain), low detection limit (less than 1%), and short response/recovery time (0.54/0.31 s). It adhered to human skin and monitored human movements such as the bending movements of joints, swallowing, and speaking successfully. Therefore, the obtained multifunctional conductive hydrogel has great potential applications in wearable strain sensors.

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Section: Results and Disscussionmentioning

confidence: 85%

Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Li,

Ren,

Zhang

et al. 2024

Biomacromolecules

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“…For the cyclic test, the dissipated energy (Δ E ) and hysteresis ( H ) of ULHOH was defined by calculating the area between the loading curve and the unloading curve using eqs and : ,, normalΔ E = ∫ Loading σ d ε − ∫ Unloading σ d ε H = normalΔ E / ∫ Loading σ d ε where σ was stress and ε was applied strain.…”

Section: Methodsmentioning

confidence: 99%

Investigation on the Dynamic Rheological Behavior of the Highly Elastic Organohydrogel

Zou,

Wang,

Tang

et al. 2023

Ind. Eng. Chem. Res.

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“…4(d)). Notably, the toughness of the P/G/A x hydrogel was 13 times higher than that of the pure P-G hydrogel (P-G toughness: 0.337 MJ m À3 ), demonstrating the weak non-covalent crosslinking between molecular chains, 43 such as PA and PVA, which enables easy breakage and reorganization. Giving hydrogel high toughness, strain, and strength.…”

Section: Mechanical Properties Of Hydrogelsmentioning

confidence: 98%

Phytic acid/tannic acid reinforced hydrogels with ultra-high strength for human motion monitoring and arrays

Xie,

Qin,

Zeng

et al. 2024

Soft Matter

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Hydroxypropyl methyl cellulose reinforced conducting polymer hydrogels with ultra-stretchability and low hysteresis as highly sensitive strain sensors for wearable health monitoring

Cited by 20 publications

References 43 publications

Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Highly Stretchable, Fast Self-Healing, Self-Adhesive, and Strain-Sensitive Wearable Sensor Based on Ionic Conductive Hydrogels

Investigation on the Dynamic Rheological Behavior of the Highly Elastic Organohydrogel

Phytic acid/tannic acid reinforced hydrogels with ultra-high strength for human motion monitoring and arrays

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