High-performance ionic conductive double-network hydrogel enabling a long-term flexible strain sensor

Gao, Min; Zhao, Rongrong; Kang, Beibei; Zhao, Zengdian; Song, Shasha

doi:10.1016/j.colsurfa.2023.131051

Cited by 12 publications

(6 citation statements)

References 37 publications

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“…Notably, GF was 2.53 in a lower strain range (0–200%), which further increased to 3.79 and 5.42 in the strain of 200–600% and 600–900%, respectively, exhibiting a good linear response in each strain interval. The hydrogel sensor indicated excellent strain sensitivity and stretchability, compared to the reported sensors (Strain = 760%, GF = 3.61; 43 400%, 3.93; 28 1000%, 8.36; 44 700%, 4.73; 45 1500%, 8.2; 46 200%, 1.65; 47 1081%, 4.94; 48 1000%, 6.04; 49 800%, 4.42; 50 600%, 4.3; 51 750%, 5.51; 52 760%, 6.79; 53 700%, 6.6; 54 1000%, 4.36 55 ) (Fig. S4, ESI†).…”

Section: Resultsmentioning

confidence: 81%

Stretchable conductive hydrogels integrated with microelectronic devices for strain sensing

Zhang,

Liao

et al. 2023

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 81%

Stretchable conductive hydrogels integrated with microelectronic devices for strain sensing

Zhang,

Liao

et al. 2023

J. Mater. Chem. C

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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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“…Researchers have developed various techniques for polymer network modulation to address these critical aspects. Gao et al (2023) employed a double network hydrogel by introducing Al 3+ ions into a combination of chitosan (CS) as a polycation and hyaluronic acid (HA) as a polyanion ( Figure 6A ). This led to the ionic coordination between hydroxyl and amino groups of CS and carboxyl groups of HA, along with hydrogen bonding between the two polymers.…”

Section: Iontronic Strain Sensor (Iss)mentioning

confidence: 99%

“…These noncovalent, dynamic, and reversible cross-linking interactions produced a material capable of remarkable stretching (up to 2000%) and exhibited a high self-healing efficiency (97%). This outstanding mechanical property translated into a ISS with a GF of 4.42, an 800% sensing range, and maintained performance even after 300 repetitions at 50% strain ( Figure 6B ) ( Gao et al, 2023 ). However, such performance improvements are ultimately limited by changes in resistance based on the globally geometric deformation during stretching.…”

Section: Iontronic Strain Sensor (Iss)mentioning

confidence: 99%

Recent advances in wearable iontronic sensors for healthcare applications

Choi,

Kang,

Lee

et al. 2023

Front. Bioeng. Biotechnol.

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Iontronic sensors have garnered significant attention as wearable sensors due to their exceptional mechanical performance and the ability to maintain electrical performance under various mechanical stimuli. Iontronic sensors can respond to stimuli like mechanical stimuli, humidity, and temperature, which has led to exploration of their potential as versatile sensors. Here, a comprehensive review of the recent researches and developments on several types of iontronic sensors (e.g., pressure, strain, humidity, temperature, and multi-modal sensors), in terms of their sensing principles, constituent materials, and their healthcare-related applications is provided. The strategies for improving the sensing performance and environmental stability of iontronic sensors through various innovative ionic materials and structural designs are reviewed. This review also provides the healthcare applications of iontronic sensors that have gained increased feasibility and broader applicability due to the improved sensing performance. Lastly, outlook section discusses the current challenges and the future direction in terms of the applicability of the iontronic sensors to the healthcare.

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High-performance ionic conductive double-network hydrogel enabling a long-term flexible strain sensor

Cited by 12 publications

References 37 publications

Stretchable conductive hydrogels integrated with microelectronic devices for strain sensing

Stretchable conductive hydrogels integrated with microelectronic devices for strain sensing

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

Recent advances in wearable iontronic sensors for healthcare applications

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