Development of Conductive Hydrogels for Fabricating Flexible Strain Sensors

Small, Journal Year: 2021, Volume and Issue: 18(5)

Published: Oct. 17, 2021

Abstract Conductive hydrogels can be prepared by incorporating various conductive materials into polymeric network hydrogels. In recent years, have been developed and applied in the field of strain sensors owing to their unique properties, such as electrical conductivity, mechanical self‐healing, anti‐freezing properties. These remarkable properties allow hydrogel‐based show excellent performance for identifying external stimuli detecting human body movement, even at subzero temperatures. This review summarizes application fabrication working different modes. Finally, a brief prospectus development future is provided.

Language: Английский

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Highly Conducting and Stretchable Double‐Network Hydrogel for Soft Bioelectronics

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(15)

Published: Feb. 16, 2022

Conducting polymer hydrogels are promising materials in soft bioelectronics because of their tissue-like mechanical properties and the capability electrical interaction with tissues. However, it is challenging to balance conductivity stretchability: pure conducting highly conductive, but they brittle; while incorporating network a form double can improve stretchability, its significantly decreases. Here, problem addressed by concentrating poorly crosslinked precursor hydrogel high content ratio achieve densified double-network (5.5 wt% polymer), exhibiting both (≈10 S cm-1 ) large fracture strain (≈150%), addition biocompatibility, softness, low swelling ratio, desired electrochemical for bioelectronics. A surface grafting method further used an adhesive layer on hydrogel, enabling robust rapid bonding Furthermore, proposed applied show high-quality physiological signal recording reliable, low-voltage stimulation based vivo rat model. This provides ideal strategy reliable tissue-device integration communications.

Language: Английский

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Biopolymer-based hydrogel electrolytes for advanced energy storage/conversion devices: Properties, applications, and perspectives

Energy storage materials, Journal Year: 2022, Volume and Issue: 48, P. 244 - 262

Published: March 15, 2022

Language: Английский

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Functional Conductive Hydrogels for Bioelectronics

ACS Materials Letters, Journal Year: 2020, Volume and Issue: 2(10), P. 1287 - 1301

Published: Aug. 25, 2020

Conductive hydrogels are widely used in various applications, such as artificial skin, flexible and implantable bioelectronics, tissue engineering. However, it is still a challenge to formulate with high electrical conductivity without compromising their physicochemical properties (e.g., toughness, stretchability, biocompatibility). Additionally, incorporating other functions, self-healing, shape memory, wet adhesion, into conductive critical many practical applications of hydrogel bioelectronics. In this Review, we highlight recent progress the development functional hydrogels. We, then, discuss potential challenges faced by areas wearable/implantable electronics cell/tissue can serve an important building block for bioelectronic devices personalized healthcare bioengineering areas.

Language: Английский

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Recent Progress in Natural Biopolymers Conductive Hydrogels for Flexible Wearable Sensors and Energy Devices: Materials, Structures, and Performance

ACS Applied Bio Materials, Journal Year: 2020, Volume and Issue: 4(1), P. 85 - 121

Published: Aug. 17, 2020

Natural biopolymer-based conductive hydrogels, which combine inherent renewable, nontoxic features, biocompatibility and biodegradability of biopolymers, excellent flexibility conductivity exhibit great potential in applications wearable stretchable sensing devices. Compared to traditional flexible substrates deriving from petro-materials-derived polymers, hydrogels consisting continuous cross-linked polymer networks a large amount water more fantastic combination stretchability because their endow the with mechanical offers them consecutive ionic transport property. Different biopolymers that are extracted bioresource intrinsic commonly considered as appropriate candidates for constructing For example, such cellulose, chitosan, silk fibroin usually chosen promising construct endowing enhanced properties remarkable biocompatibility. This review summarizes recent progress natural utilized electrical devices series typical including fibroin, gelatin. The chemical structures physicochemical four demonstrated, diverse hydrogel sensors discussed detail. Finally, remaining challenges expectations discussed.

Language: Английский

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Tissue adhesive hydrogel bioelectronics

Journal of Materials Chemistry B, Journal Year: 2021, Volume and Issue: 9(22), P. 4423 - 4443

Published: Jan. 1, 2021

Flexible bioelectronics have promising applications in electronic skin, wearable devices, biomedical electronics, etc. Hydrogels unique advantages for due to their tissue-like mechanical properties and excellent biocompatibility. Particularly, conductive tissue adhesive hydrogels can self-adhere bio-tissues great potential implantable bioelectronics. This review focuses on the recent progress hydrogel bioelectronics, including mechanism preparation of hydrogels, fabrication strategies applications. Some perspectives are provided at end review.

Language: Английский

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Hydrogel-Based Sensor Networks: Compositions, Properties, and Applications—A Review

ACS Applied Bio Materials, Journal Year: 2020, Volume and Issue: 4(1), P. 140 - 162

Published: Nov. 17, 2020

Hydrogels are three-dimensional porous polymeric networks prepared by physical or chemical cross-linking of hydrophilic molecules, which can be made into smart materials through judicious modifications to recognize external stimuli; more specifically, this accomplished the integration with stimuli-responsive polymers sensing molecules that has drawn considerable attention in their possible roles as sensors and diagnostic tools. They tailored different structures integrated systems, depending on structure, sensitivity stimuli biocompatibility. A panoramic overview advances field hydrogels over past several decades focusing a variety protocols hydrogel preparations is provided, major focus natural polymers. The composites incorporating inorganic nanoparticles organic compounds for sensor applications mechanisms also discussed.

Language: Английский

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Design and fabrication of conductive polymer hydrogels and their applications in flexible supercapacitors

Journal of Materials Chemistry A, Journal Year: 2020, Volume and Issue: 8(44), P. 23059 - 23095

Published: Jan. 1, 2020

Conductive polymer hydrogels, which combine the advantages of both polymers and conductive materials, have huge potential in flexible supercapacitors.

Language: Английский

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Engineering Smart Composite Hydrogels for Wearable Disease Monitoring

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: April 15, 2023

Growing health awareness triggers the public's concern about problems. People want a timely and comprehensive picture of their condition without frequent trips to hospital for costly cumbersome general check-ups. The wearable technique provides continuous measurement method monitoring by tracking person's physiological data analyzing it locally or remotely. During process, different kinds sensors convert signals into electrical optical that can be recorded transmitted, consequently playing crucial role in techniques. Wearable application scenarios usually require possess excellent flexibility stretchability. Thus, designing flexible stretchable with reliable performance is key technology. Smart composite hydrogels, which have tunable properties, mechanical biocompatibility, multi-stimulus sensitivity, are one best sensitive materials monitoring. This review summarizes common synthetic optimization strategies smart hydrogels focuses on current field

Language: Английский

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Probing and Manipulating Noncovalent Interactions in Functional Polymeric Systems

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(18), P. 14594 - 14678

Published: Sept. 2, 2022

Noncovalent interactions, which usually feature tunable strength, reversibility, and environmental adaptability, have been recognized as driving forces in a variety of biological chemical processes, contributing to the recognition between molecules, formation molecule clusters, establishment complex structures macromolecules. The marriage noncovalent interactions conventional covalent polymers offers systems novel mechanical, physicochemical, properties, are highly dependent on binding mechanisms that can be illuminated via quantification. This review systematically discusses nanomechanical characterization typical polymeric systems, mainly through direct force measurements at microscopic, nanoscopic, molecular levels, provide quantitative information (e.g., ranges, strengths, dynamics) behaviors. fundamental understandings intermolecular interfacial then correlated macroscopic performances series noncovalently bonded polymers, whose functions stimuli-responsiveness, self-healing capacity, universal adhesiveness) customized manipulation providing insights into rational design advanced materials with applications biomedical, energy, environmental, other engineering fields.

Language: Английский

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