In Situ Forming Dual‐Conductive Hydrogels Enable Conformal, Self‐Adhesive and Antibacterial Epidermal Electrodes

Advanced Functional Materials, Год журнала: 2023, Номер 33(38)

Опубликована: Май 26, 2023

Abstract Conductive hydrogels (CHs) are regarded as one of the most promising materials for bioelectronic devices on human‐machine interfaces (HMIs). However, conventional CHs cannot conform well with complex skin surfaces, such hairy or wrinkled skin, due to pre‐formation and insufficient adhesion; they also usually lack antibacterial abilities require tissue‐harm time‐consuming preparation (e.g., heating ultraviolet irradiation), which limits their practical application HMIs. Herein, an in situ forming CH is proposed by taking advantage PEDOT:PSS‐promoted self‐polymerization zwitterionic [2‐(methacryloyloxy)ethyl]dimethyl‐(3‐sulfopropyl) (SBMA). The hydrogel formed spontaneously after injection precursor solution onto desired location without any additional treatments. as‐prepared possesses excellent elasticity (elastic recovery >96%), desirable adhesive strength (≈6.5 kPa), biocompatibility, intrinsically properties. Without apparent heat release (<5 °C) during gelation, can form skin. Additionally, obtained establish tight contact highly conformal surfaces irregular wounds. Finally, applied epidermal electrodes record stable reliable surface electromyogram signals from (with high signal‐to‐noise ratio, SNR ≈ 32 dB) accelerate diabetic wound healing under electrical stimulation.

Язык: Английский

---

Adhesion mechanism and application progress of hydrogels

European Polymer Journal, Год журнала: 2022, Номер 173, С. 111277 - 111277

Опубликована: Май 20, 2022

Язык: Английский

---

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(24), С. 29413 - 29424

Опубликована: Июнь 6, 2023

Flexible strain sensors based on self-adhesive, high-tensile, super-sensitive conductive hydrogels have promising application in human-computer interaction and motion monitoring. Traditional difficulty balancing mechanical strength, detection function, sensitivity, which brings challenges to their practical applications. In this work, the double network hydrogel composed of polyacrylamide (PAM) sodium alginate (SA) was prepared, MXene sucrose were used as materials reinforcing materials, respectively. Sucrose can effectively enhance performance improve ability withstand harsh conditions. The sensor has excellent tensile properties (strain >2500%), high sensitivity with a gauge factor 3.76 at 1400% strain, reliable repeatability, self-adhesion, anti-freezing ability. Highly sensitive be assembled into that distinguish between various strong or subtle movements human body, such joint flexion throat vibration. addition, applied handwriting recognition English letters by using fully convolutional (FCN) algorithm achieved accuracy 98.1% for recognition. as-prepared broad prospect human-machine interaction, provides great potential flexible wearable devices.

Язык: Английский

---

Recent Advances in Zwitterionic Hydrogels: Preparation, Property, and Biomedical Application

Gels, Год журнала: 2022, Номер 8(1), С. 46 - 46

Опубликована: Янв. 7, 2022

Nonspecific protein adsorption impedes the sustainability of materials in biologically related applications. Such activates immune system by quick identification allogeneic and triggers a rejection, resulting rapid failure implant drugs. Antifouling have been rapidly developed past 20 years, from natural polysaccharides (such as dextran) to synthetic polymers polyethylene glycol, PEG). However, recent studies shown that traditional antifouling materials, including PEG, still fail overcome challenges complex human environment. Zwitterionic are class contain both cationic anionic groups, with their overall charge being neutral. Compared PEG zwitterionic much stronger hydration, which is considered most important factor for antifouling. Among hydrogels excellent structural stability controllable regulation capabilities various biomedical scenarios. Here, we first describe mechanism structure materials. Following preparation property hydrogels, advances applications reviewed.

Язык: Английский

---

An overview of conductive composite hydrogels for flexible electronic devices

Advanced Composites and Hybrid Materials, Год журнала: 2024, Номер 7(2)

Опубликована: Фев. 17, 2024

Язык: Английский

---

Environmentally Adaptive Polymer Hydrogels: Maintaining Wet‐Soft Features in Extreme Conditions

Advanced Functional Materials, Год журнала: 2023, Номер 33(41)

Опубликована: Июнь 13, 2023

Abstract Hydrogels have been widely explored to adapt different application circumstances. As typical wet‐soft materials, the high‐water content of hydrogels is beneficial their wide biomedical applications. Moreover, displaying considerable potential in some high‐tech areas, like brain‐computer interface, intelligent actuator, flexible sensor, etc. However, traditional hydrogel susceptive freezing below zero, dehydration, performance swelling‐induced deformation, and suffers from mechanical damage extremely environments, which result loss peculiarities (e.g., flexibility, structure integrity, transparency), greatly limiting Therefore, reducing point, improving dehydration/solution resistance, designing adaptability are effective strategies endow with extreme environmental adaptability, thus broadening fields. This review systematically summarizes research advances environmentally adaptive (EAHs), comprising anti‐freezing, dehydration‐resistant, acid/base/swelling deformation‐resistant, environment (MEAHs). Firstly, fabrication methods presented, including deep eutectic solvent/ionic liquid substituent, addition salts, organogel, polymer network modification, double (DN) complex/nanocomposite strategy, Meanwhile, features approaches overviewed. The mechanisms, properties, applications wound dressing, sensor) EAHs demonstrated. Finally, issues future perspectives for EAHs’ researches

Язык: Английский

---

Nanocomposite conductive hydrogels with Robust elasticity and multifunctional responsiveness for flexible sensing and wound monitoring

Materials Horizons, Год журнала: 2023, Номер 10(6), С. 2096 - 2108

Опубликована: Янв. 1, 2023

An ultradurable conductive hydrogel is designed via radical polymerization of APBA and AM in the presence XLG-stabilized CNTs. The can monitor various human motions exhibit vast potential sensing pro-healing skin wounds.

Язык: Английский

---

Advances in Wireless, Batteryless, Implantable Electronics for Real-Time, Continuous Physiological Monitoring

Nano-Micro Letters, Год журнала: 2023, Номер 16(1)

Опубликована: Дек. 15, 2023

This review summarizes recent progress in developing wireless, batteryless, fully implantable biomedical devices for real-time continuous physiological signal monitoring, focusing on advancing human health care. Design considerations, such as biological constraints, energy sourcing, and wireless communication, are discussed achieving the desired performance of enhanced interface with tissues. In addition, we achievements materials used systems, emphasizing their importance multi-functionalities, biocompatibility, hemocompatibility. The batteryless offer minimally invasive device insertion to body, enabling portable monitoring advanced disease diagnosis. Lastly, summarize most practical applications care, highlighting potential immediate commercialization clinical uses.

Язык: Английский

---

Fully Polymeric Conductive Hydrogels with Low Hysteresis and High Toughness as Multi‐Responsive and Self‐Powered Wearable Sensors

Advanced Functional Materials, Год журнала: 2024, Номер 34(32)

Опубликована: Апрель 22, 2024

Abstract High mechanical strength, excellent toughness, low hysteresis, and robust resilience are of great importance for stretchable conductive hydrogels (CHs) to heighten their reliabilities self‐powered sensing applications. However, it still remains challenging simultaneously obtain the mutually exclusive performances. Herein, an intrinsically adhesive hydrogel is fabricated by one‐step radical polymerization acrylamide (AAm), three hydroxy groups together clustered‐N‐[tris(hydroxymethyl)methyl]acrylamide (THMA), cationic 1‐Butyl‐3‐Vinylimidazolium Bromide (ILs) dissolved in core‐shell structurally dispersed PEDOT:PSS (PP) solution. Owing abundant clustered hydrogen bonds, electrostatic interactions between PILs chains anionic PSS shells, polymer chain entanglements, CHs feature superior properties with a high tensile strength (0.25 MPa), fracture strain (1015%), toughness (1.22 MJ m ‐3 ), energy 36.5 kJ ‐2 extremely hysteresis (5%), display fatigue resistance. As result, indicate gauge factor up 10.46, broad range (1‐900%) pressure (0.05‐100 kPa), fast responsive rate, thus qualifying monitoring reliably accurately large tiny human movements daily life. Moreover, hydrogel‐assembled triboelectric nanogenerators (TENGs) exhibit stable electrical output performances, which greatly promising flexible wearable electronics.

Язык: Английский

---

Recent Progress in Biomedical Sensors Based on Conducting Polymer Hydrogels

ACS Applied Bio Materials, Год журнала: 2023, Номер 6(5), С. 1720 - 1741

Опубликована: Апрель 28, 2023

Biosensors are increasingly taking a more active role in health science. The current needs for the constant monitoring of biomedical signals, as well growing spending on public health, make it necessary to search materials with combination properties such biocompatibility, electroactivity, resorption, and high selectivity certain bioanalytes. Conducting polymer hydrogels seem be very promising materials, since they present many used biosensors. Furthermore, their can shaped enhanced by designing conductive hydrogel-based composites specific functionalities depending end application. This work will review recent state art different biological biosensor applications, discuss components alone combination, reveal potential candidate fabrication all-organic diagnostic, wearable, implantable sensor devices.

Язык: Английский

---