Bioinspired, nucleobase-driven, highly resilient, and fast-responsive antifreeze ionic conductive hydrogels for durable pressure and strain sensors

Ding, Xiang; Li, Jian; Yang, Mingming; Zhao, Qian; Wu, Guolin; Sun, Pingchuan

doi:10.1039/d1ta05262d

Cited by 60 publications

(42 citation statements)

References 57 publications

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“…Figure a shows the comparison of our work to various references in terms of stretchability versus response time. [ 6,9,21,23,38,40,54–64 ] It is worth noting that our PAM/PBA‐IL3/CNF2 hydrogel sensor simultaneously exhibits higher intrinsic stretchability (up to 1810 ± 38%) and a fast response time (195 ms) than other reported ICHs. In addition, as shown in Figure 8b, compared with recently reported gel‐based strain sensors, [ 4,12,21,38,55,65,66 ] most procedures for constructing such sensors often have restricted functionalities, such as their conductivity, stretchability, gauge factor, self‐healing, adhesion, transparency, and water retention.…”

Section: Resultsmentioning

confidence: 95%

“…[ 6,9,21,23,38,40,54–64 ] It is worth noting that our PAM/PBA‐IL3/CNF2 hydrogel sensor simultaneously exhibits higher intrinsic stretchability (up to 1810 ± 38%) and a fast response time (195 ms) than other reported ICHs. In addition, as shown in Figure 8b, compared with recently reported gel‐based strain sensors, [ 4,12,21,38,55,65,66 ] most procedures for constructing such sensors often have restricted functionalities, such as their conductivity, stretchability, gauge factor, self‐healing, adhesion, transparency, and water retention. However, our hydrogel‐based sensors prepared by a facile one‐step approach clearly display excellent comprehensive merits: i) ingenious structural design and crosslinking without the use of complicated components, ii) a fine trade‐off between electrical and mechanical performance, and iii) favorable adhesion, self‐healing property, transparency, and water retention.…”

Section: Resultsmentioning

confidence: 99%

“…a) Chart compares the response time and stretchability of our work (red star) and references. [ 6,9,21,23,38,40,54–64 ] b) Comparison between our work and currently reported sensors in terms of their conductivity, stretchability, gauge factor, self‐healing, adhesion, transparency, and water retention. [ 4,12,21,38,55,65,66 ] …”

Section: Resultsmentioning

confidence: 99%

“…[ 18–20 ] In recent studies, ICHs based on interpenetrating polymer networks and double networks have been developed to prepare mechanically excellent hydrogels that have shown great promise for use in high‐performance sensors. [ 21–24 ] Cellulose nanofibrils (CNFs), a plant‐based renewable biomass that possesses a unique nanoscale structure with a high aspect ratio and specific surface area, also has distinguishable mechanical properties, biocompatibility, and a tunable surface charge; thus, they have a key role in the “dynamic crosslinking network.” [ 25–27 ] For example, using CNFs, polyvinyl alcohol (PVA), and NaCl, Jiang and co‐workers developed a double network ICH‐based sensor that showed high stretchability (>660%), tensile strength (2.1 MPa), and toughness (5.25 MJ m −3 ) along with stable ionic conductivity (3.2 S m −1 ) under large deformation. [ 28 ] Ge and co‐workers prepared a highly stretchable (>731%) and strong (250 KPa) interpenetrating polymer network ICH by acrylamide (AM) polymerization in the presence of CNF and LiCl, which showed good potential for use as a new generation of e‐skins.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Super Stretchable, Self‐Healing, Adhesive Ionic Conductive Hydrogels Based on Tailor‐Made Ionic Liquid for High‐Performance Strain Sensors

Yao

Zhang

Qian

et al. 2022

Adv Funct Materials

177

143

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Ionic conductive hydrogels (ICHs) integrate the conductive performance and soft nature of tissue‐like materials to imitate the features of human skin with mechanical and sensory traits; thus, they are considered promising substitutes for conventional rigid metallic conductors when fabricating human‐motion sensors. However, the simultaneous incorporation of excellent stretchability, toughness, ionic conductivity, self‐healing, and adhesion via a simple method remains a grand challenge. Herein, a novel ICH platform is proposed by designing a phenylboronic acid‐ionic liquid (PBA‐IL) with multiple roles that simultaneously realize the highly mechanical, electrical, and versatile properties. This elaborately designed semi‐interpenetrating network ICH is fabricated via a facile one‐step approach by introducing cellulose nanofibrils (CNFs) into the PBA‐IL/acrylamide cross‐linked network. Ingeniously, the dynamic boronic ester bonds and physical interactions (hydrogen bonds and electrostatic interactions) of the cross‐linked network endow these hydrogels with remarkable stretchability (1810 ± 38%), toughness (2.65 ± 0.03 MJ m−3), self‐healing property (92 ± 2% efficiency), adhesiveness, and transparency. Moreover, the construction of this material shows that CNFs can synergistically enhance mechanical performance and conductivity. The wide working strain range (≈1000%) and high sensitivity (GF = 8.36) make this ICH a promising candidate for constructing the next generation of gel‐based strain sensor platforms.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Super Stretchable, Self‐Healing, Adhesive Ionic Conductive Hydrogels Based on Tailor‐Made Ionic Liquid for High‐Performance Strain Sensors

Yao

Zhang

Qian

et al. 2022

Adv Funct Materials

177

143

View full text Add to dashboard Cite

show abstract

“…Poly(acrylamide-N-acryloyl-2-glycine)/sodium dodecyl sulfate/LiCl [97 reported ones. Meanwhile, the Gel-CG6 hydrogel strain sensor exhibits good self-healing performance, adhesive ability, conductivity, and biocompatibility.…”

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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Recent Progress of Conductive Hydrogel Fibers for Flexible Electronics: Fabrications, Applications, and Perspectives

Liu

Wei

et al. 2023

Adv Funct Materials

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lightweight, portable, foldable, stretchable, and biocompatible are triggering the intense interests of researchers from multidisciplinary fields like biology, material science, and chemistry. [9][10][11] Nowadays, great attempts have been devoted to developing advanced flexible electronics by integrating various inorganic or organic traditional conductive functional materials with flexible electrochemically non-active elastic substrates. [12][13][14][15][16][17] Generally, traditional conductive functional materials encounter the shortcomings such as high price, inherent rigidity, weak biocompatibility, poor mechanical, and inferior interface bonding properties, which are employed to evaluate the performance of the flexible electronics materials. Therefore, pursuing these materials with practical applications is an emergent issue in the research field.Nevertheless, in numerous conductive functional materials, hydrogels with 3D network structures have been largely selected as the excellent candidates due to their high water content, excellent biocompatibility and biodegradability properties, high elasticity, and outstanding stimulus responsiveness. [18][19][20][21][22][23] Conductive hydrogels are generally constructed via integrating various conductive substances into the hydrogel matrix, which are comprised of carbon materials (carbon nanotubes (CNTs), graphite), metal oxides, metal sulfides, metal nanoparticles and conductive polymers (polyaniline (PANI), polypyrrole (PPy), poly (3,4-ethylenedioxythiophene) (PEDOT:PSS)). [24][25][26][27][28][29][30] For example, Han et al. fabricated a CNTs-based conductive hydrogel for strain sensors by in situ polymerization of acrylic acid and acrylamide in water/glycerol solutions in the presence of polydopamine-decorated CNTs. [28] Devaki et al. reported a 3D Ag nanoparticles-polyacrylic acid conductive hydrogel via combining in situ polymerization of acrylic acid and reduction of Ag + . [29] Duan et al. constructed a robust and force-sensitive conductive hydrogel employing synthesizing polyacrylamide and PANI in closely packed swollen chitosan microspheres. [30] According to the different configurations of hydrogels, conductive hydrogels are allowed to be processed into 3D bulk gels, 2D gel films, 1D gel fibers, and 0D microgels. [31][32][33][34][35][36] The mechanical flexibility of 1D fibrous configuration is superior to that of 3D bulk or 2D film configuration due to its well-oriented polymer chains, light weight, and low dimensions for flexible electronics. Moreover, ultra-flexible fibrous materials can be easily woven into diverse soft and breathable fabrics, which

show abstract

Bioinspired, nucleobase-driven, highly resilient, and fast-responsive antifreeze ionic conductive hydrogels for durable pressure and strain sensors

Abstract: Conductive hydrogels have drawn tremendous attention in flexible devices, soft robotics, and artificial intelligence. The integration of synergistic characteristics of reliable resilience, high strain sensitivity, and excellent mechanical properties is...

Cited by 60 publications

References 57 publications

Super Stretchable, Self‐Healing, Adhesive Ionic Conductive Hydrogels Based on Tailor‐Made Ionic Liquid for High‐Performance Strain Sensors

Super Stretchable, Self‐Healing, Adhesive Ionic Conductive Hydrogels Based on Tailor‐Made Ionic Liquid for High‐Performance Strain Sensors

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

Recent Progress of Conductive Hydrogel Fibers for Flexible Electronics: Fabrications, Applications, and Perspectives

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