Mussel-adhesive chemistry inspired conductive hydrogel with self-adhesion, biocompatibility, self-recovery and fatigue-resistance performances as flexible sensing electronics

Composites Part A Applied Science and Manufacturing, Год журнала: 2024, Номер 185, С. 108330 - 108330

Опубликована: Июнь 22, 2024

Язык: Английский

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Intrinsic Anti‐Freezing, Tough, and Transparent Hydrogels for Smart Optical and Multi‐Modal Sensing Applications

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Abstract Hydrogels have received great attention due to their molecular designability and wide application range. However, they are prone freeze at low temperatures the existence of mass water molecules, which can damage flexibility transparency, greatly limiting use in cold environments. Although adding cryoprotectants reduce freezing point hydrogels, it may also deteriorate mechanical properties face risk cryoprotectant leakage. Herein, microphase‐separated structures hydrogels regulated confine molecules sub‐6 nm nanochannels increase proportion bound water, endowing with intrinsic anti‐freezing properties, high strength, good stretchability, remarkable fracture energy, puncture resistance. Even after being kept liquid nitrogen for 1000 h, hydrogel still maintains transparency. The exhibit excellent low‐temperature shape memory intelligent optical waveguide properties. Additionally, be assembled into strain pressure sensors flexible sensing both room temperatures. intrinsically offers broad prospects electronic applications.

Язык: Английский

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Hydrophobic and Adhesive Elastomer Encapsulation for Anti‐Drying, Non‐Swelling, and Adhesive Hydrogels

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 25, 2024

Abstract Traditional hydrogels often face issues like dehydration, excessive swelling, and poor adhesion, limiting their practical applications. This study presents a facile universal method to create elastomer‐encapsulated with improved water retention, non‐swelling, enhanced adhesion. n‐Butyl acrylate (BA) 2,2,3,4,4,4‐hexafluorobutyl methacrylate (HFBMA) are utilized as the “soft” “hard” monomers, respectively, in situ construct elastomer coatings on hydrogel surface through surface‐confined copolymerization. The resulting transparent, hydrophobic, adhesive coating is tightly bound surface, conferring upon it robust defense against dehydration swelling various media, strong adhesion diverse substrates both aerial submerged conditions. Furthermore, this encapsulation strategy also augments mechanical attributes of bulk hydrogel, including its tensile properties puncture resistance, applicable wide array types configurations. Additionally, applied conductive results flexible sensors high sensitivity, reversible resistance change, exceptional sensing stability, significantly durability air underwater environments. These suggest potential applications harsh environments, such acoustic detection sonar scanning camouflage for submarines.

Язык: Английский

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Bioinspired Ultra‐Stretchable and Highly Sensitive Structural Color Electronic Skins

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 5, 2024

Abstract Organisms possess remarkably adaptive ability to complex environments. For example, chameleons can alter their skin color adapt varying environments, which has inspired significant advances in bioinspired soft electronic skins (E‐skins), and wide applications wearable sensors, intelligent robots, health monitoring. However, current E‐skins face challenges ultra‐stretchability, high sensitivity, long‐term stability owing the intrinsic limitations associated with mismatched interface between matrix hard conductive fillers, hindering practical applications. Here, it is reported that structural (SC E‐skins) consist of liquid metal particles (LMPs), periodical ordered colloidal crystal arrays, ultra‐stretchable hydrogel, imparting synergistic durable electrical–optical sensing capabilities. Such SC demonstrate outstanding performances including superior flexibility (elongation at break > 1100%), sensitivity (gauge factor = 3.26), fast synergetic electric–optical response time (≈100 ms), durability (over 1500 cycles), accuracy (R 2 99.5%). These excellent capability converting mechanical signals into outputs hold great promise for smart devices, affording a new horizon developing advanced monitoring technologies.

Язык: Английский

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Ways forward with conductive hydrogels: Classifications, properties, and applications in flexible electronic and energy gadgets

Materials Science and Engineering R Reports, Год журнала: 2025, Номер 163, С. 100923 - 100923

Опубликована: Янв. 8, 2025

Язык: Английский

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Highly stretchable and sensitive sensing composite yarn based on multidimensional structure modulation for wearable E-textiles

Applied Materials Today, Год журнала: 2025, Номер 42, С. 102591 - 102591

Опубликована: Янв. 11, 2025

Язык: Английский

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Graphene‐Doped Hydrogels with Enhanced Conductivity and Stretchability for All‐Weather Wearable Devices

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Abstract Conductive hydrogels with high water content, excellent adhesion, and mechanical flexibility have garnered significant attention for flexible wearable electronic applications. Despite advancements, achieving robust electrical properties under extreme environmental conditions remains a key challenge. In this study, cost‐effective, lignin‐tannin nanosphere graphene‐doped hydrogel (LTGH) synthesized by dispersing graphene within the matrix via self‐assembled sodium lignosulfonate tannic acid nanospheres is presented. The LTGH exhibits exceptional conductivity (28 S m −1 ), ultra‐high sensitivity (maximum gauge factor ≈350), an ultra‐low detection limit (<0.5%). Additionally, it demonstrates outstanding stretchability (>1800%), strong adhesion (>50 kPa), UV resistance, antibacterial properties. By incorporating ethylene glycol, maintains reliable performance across wide temperature range (−80 to 50 °C). Furthermore, successfully integrated into convolutional neural network‐based sign language recognition system, compact lightweight design accuracy, rapid responsiveness, cost efficiency. This work highlights superior sensing capabilities of conductive hydrogels, underscoring their potential in all‐weather technologies.

Язык: Английский

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Multi-stimuli-responsive conductive and luminescent hydrogels for wearable sensors and information encryption transmission

Chemical Engineering Journal, Год журнала: 2024, Номер 496, С. 153881 - 153881

Опубликована: Июль 9, 2024

Язык: Английский

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Quasi‐1D Conductive Network Composites for Ultra‐Sensitive Strain Sensing

Advanced Science, Год журнала: 2024, Номер 11(33)

Опубликована: Июнь 28, 2024

Abstract Highly performance flexible strain sensor is a crucial component for wearable devices, human‐machine interfaces, and e‐skins. However, the sensitivity of highly limited by range large destruction conductive network. Here quasi‐1D network (QCN) proposed design an ultra‐sensitive sensor. The orientation particles can effectively reduce number redundant percolative pathways in composites. maximum will reach upper limit when whole composite remains only “one” percolation pathway. Besides, QCN structure also confine tunnel electron spread through rigid inclusions which significantly enlarges strain‐resistance effect along tensile direction. exhibits state‐of‐art including gauge factor (862227), fast response time (24 ms), good durability (cycled 1000 times), multi‐mechanical sensing ability (compression, bending, shearing, air flow vibration, etc.). Finally, be exploited to realize interface (HMI) application acoustic signal recognition (instrument calibration) spectrum restoration (voice parsing).

Язык: Английский

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Applied research and recent advances in the development of flexible sensing hydrogels from cellulose: A review

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 281, С. 136100 - 136100

Опубликована: Окт. 24, 2024

Язык: Английский

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