Development of Conductive Hydrogels for Fabricating Flexible Strain Sensors

Small, Год журнала: 2021, Номер 18(5)

Опубликована: Окт. 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.

Язык: Английский

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Multifunctional conductive hydrogel-based flexible wearable sensors

TrAC Trends in Analytical Chemistry, Год журнала: 2020, Номер 134, С. 116130 - 116130

Опубликована: Ноя. 26, 2020

Язык: Английский

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Smart/stimuli-responsive hydrogels: Cutting-edge platforms for tissue engineering and other biomedical applications

Materials Today Bio, Год журнала: 2021, Номер 13, С. 100186 - 100186

Опубликована: Дек. 9, 2021

Recently, biomedicine and tissue regeneration have emerged as great advances that impacted the spectrum of healthcare. This left door open for further improvement their applications to revitalize impaired tissues. Hence, restoring functions. The implementation therapeutic protocols merge biomimetic scaffolds, bioactive molecules, cells plays a pivotal role in this track. Smart/stimuli-responsive hydrogels are remarkable three-dimensional (3D) bioscaffolds intended engineering other biomedical purposes. They can simulate physicochemical, mechanical, biological characters innate Also, they provide aqueous conditions cell growth, support 3D conformation, mechanical stability cells, serve potent delivery matrices molecules. Many natural artificial polymers were broadly utilized design these intelligent platforms with novel advanced characteristics tailored functionalities fit such applications. In present review, we highlighted different types smart/stimuli-responsive emphasis on synthesis scheme. Besides, mechanisms responsiveness stimuli elaborated. Their potential was discussed. Furthermore, exploitation targeted drug delivery, smart biosensors, actuators, 4D printing, culture outlined. addition, threw light self-healing biomedicine. Eventually, presented future perceptions Conclusively, current progress enhances prospective function intelligent, sophisticated systems

Язык: Английский

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Nanocomposite hydrogel-based strain and pressure sensors: a review

Journal of Materials Chemistry A, Год журнала: 2020, Номер 8(36), С. 18605 - 18623

Опубликована: Янв. 1, 2020

Design methods and applications of nanocomposite hydrogel-based strain pressure sensors have been summarized classified in this review.

Язык: Английский

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Functional silk fibroin hydrogels: preparation, properties and applications

Journal of Materials Chemistry B, Год журнала: 2020, Номер 9(5), С. 1238 - 1258

Опубликована: Дек. 21, 2020

Over the past decade, hydrogels prepared from silk fibroin have received immense research attention due to advantages of safe nature, biocompatibility, controllable degradation and capability combine with other materials. They broad application prospects in biomedicine fields. However, traditional protein a simple network structure single functionality, thus, leading poor adaptability towards complex environments. As result, fields development been significantly restricted. functional has provided opportunities overcome limitations hydrogels. In recent years, design their potential applications attracted scholars worldwide. Nevertheless, comprehensive review on is missing so far. order gain an in-depth understanding status hydrogels, this article reviews current preparation, properties The first briefly introduces cross-linking methods (including physical chemical cross-linking), principles, Subsequently, types (e.g., high strength, injectable, self-healing, adhesive, conductive, environmental stimuli-responsive, 3D printable, etc.) principles for implementation introduced. Next, based various aspects these biomedical field (tissue engineering, sustained drug release, wound repair, adhesives, bioelectronics are reviewed. Finally, challenges associated analyzed. It hoped that study will contribute future innovation by promoting rational new mechanisms successful realization target applications.

Язык: 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, Год журнала: 2020, Номер 4(1), С. 85 - 121

Опубликована: Авг. 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.

Язык: Английский

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Adhesive, Stretchable, and Transparent Organohydrogels for Antifreezing, Antidrying, and Sensitive Ionic Skins

ACS Applied Materials & Interfaces, Год журнала: 2021, Номер 13(1), С. 1474 - 1485

Опубликована: Янв. 4, 2021

As a flexible wearable device, hydrogel-based sensors have attracted widespread attention in soft electronics. However, the application of traditional hydrogels at extreme temperatures or for long-term stability still remain challenge because existence water. Herein, we reported an antifreezing and antidrying organohydrogel with high transparency (over 85% transmittance), stretchability (up to 1200%), robust adhesiveness various substrates, which consist polyacrylic acid, gelatin, AlCl3+, tannic acid water/glycerin binary solvent as dispersion medium. easily forms strong hydrogen bonds water molecules, organohydrogels exhibited excellent tolerance drying freezing. The maintained conductivity, adhesion, stable sensitivity after storage subzero temperature (−14 °C). Moreover, organohydrogel-based gauge factor 2.5 (strain, 0–100%) could detect both large-scale movements subtle motions. Therefore, multifunctional organohydrogel-wearable properties promising potential human–machine interfaces healthcare monitoring under broad range environmental conditions.

Язык: Английский

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Hydrogels Classification According to the Physical or Chemical Interactions and as Stimuli-Sensitive Materials

Gels, Год журнала: 2021, Номер 7(4), С. 182 - 182

Опубликована: Окт. 25, 2021

Hydrogels are attractive biomaterials with favorable characteristics due to their water uptake capacity. However, hydrogel properties determined by the cross-linking degree and nature, tacticity, crystallinity of polymer. These can be sorted out according internal structure response external factors. In this case, interaction reversible when chains led physicochemical interactions. physical hydrogels synthesized through several techniques such as crystallization, amphiphilic copolymers, charge interactions, hydrogen bonds, stereo-complexing, protein contrast, irreversible covalent cross-linking. Synthesized chemical interactions present a high density employed using graft copolymerization, reactive functional groups, enzymatic methods. Moreover, specific smart have also been denoted response, pH, temperature, electric, light, enzyme. This review deeply details type hydrogel, either or response. Furthermore, we detail some main applications these in biomedicine field, drug delivery systems, scaffolds for tissue engineering, actuators, biosensors, many other applications.

Язык: Английский

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Stimuli-responsive conductive hydrogels: design, properties, and applications

Materials Chemistry Frontiers, Год журнала: 2021, Номер 5(5), С. 2092 - 2123

Опубликована: Янв. 1, 2021

This article discusses the preparation, performance, applications, and future research directions of stimuli-responsive conductive hydrogels.

Язык: Английский

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

ACS Applied Bio Materials, Год журнала: 2020, Номер 4(1), С. 140 - 162

Опубликована: Ноя. 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.

Язык: Английский

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