Stratum Corneum‐Inspired Zwitterionic Hydrogels with Intrinsic Water Retention and Anti‐Freezing Properties for Intelligent Flexible Sensors

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Hydrogels, which mimic the properties of natural tissues, are essential for flexible electronics in human‐machine interfaces (HMIs). However, traditional hydrogels suffer from dehydration, compromising stability and functionality. To address this issue, a stratum corneum‐inspired, water‐retaining hydrogel is developed using hygroscopic polymers bound water. Three types hydrophilic monomers (non‐ionic, mono‐ionic, zwitterionic) explored, with polyzwitterions, particularly N,N‐dimethyl (acrylamidopropyl) ammonium propane sulfonate (DMAAPS), forming quasi‐hydrogel that retains softness flexibility conventional hydrogels. Water acts as plasticizer, enhancing polymer chain mobility reducing stiffness. The DMAAPS maintains 100% weight retention under specific humidity conditions shows skin‐like across wide range. Young's modulus increases 54 to 118 kPa relative decreases 80% 40%. absence free water confers intrinsic anti‐freezing properties. A triple crosslinking mechanism conductive endow stretchability (> 2000%), toughness, elasticity, self‐healing, stable sensing capabilities. functions an excellent sensor real‐time, sensitive detection human motion physiological signals. An intelligent handwriting recognition platform high accuracy also established double‐channel signal collection machine learning algorithms, offering insights next‐generation durable, biomimetic, smart HMIs.

Язык: Английский

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Multiscale Modeling and Simulation of Zwitterionic Anti-fouling Materials

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

Zwitterionic materials with cationic and anionic moieties in the same chain, being electrically neutral, have excellent hydrophilicity, stability, biocompatibility, outstanding anti-biofouling performance. Because of their unique properties, zwitterionic are widely applied to membrane separation, drug delivery, surface coating, etc. However, what is root properties? It necessary study structure-property relationships compounds guide design development materials. Modeling simulation methods considered be efficient technologies for understanding advanced principle. This Review systematically summarizes computational exploration recent years. First, classes summarized. Second, different scale introduced briefly. To reveal materials, multiscale modeling studies at spatial temporal scales The results indicated that strong electrostatic interaction between zwitterions water molecules promotes formation a stable hydration layer, namely, superhydrophilicity, leading anti-fouling properties. Finally, we offer our viewpoint on application techniques future. work establishes bridge from atomic molecular mesoscopic macroscopic helps provide an in-depth

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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Mechanical tough, stretchable, and adhesive PEDOT:PSS-based hydrogel flexible electronics towards multi-modal wearable application

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161645 - 161645

Опубликована: Март 1, 2025

Язык: Английский

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Interfacing Neuron-Motor Pathways with Stretchable and Biocompatible Electrode Arrays

Accounts of Chemical Research, Год журнала: 2024, Номер 57(16), С. 2255 - 2266

Опубликована: Июль 18, 2024

ConspectusIn the field of neuroscience, understanding complex interactions within intricate neuron-motor system depends crucially on use high-density, physiological multiple electrode arrays (MEAs). In system, transmission biological signals primarily occurs through electrical and chemical signaling. Taking neurons for instance, when a neuron receives external stimuli, it generates an signal known as action potential. This potential propagates along neuron's axon is transmitted to other via synapses. At synapse, (neurotransmitters) are released, allowing traverse synaptic gap influence next neuron. MEAs can provide unparalleled insights into neural patterns interfacing with nerve systems their excellent spatiotemporal resolution. However, inherent differences in mechanical properties between these artificial devices tissues lead serious complications after chronic implantation, such body rejection, infection, tissue damage, or device malfunction. A promising strategy enhance MEAs' biocompatibility involves minimizing thickness, which aligns bending stiffness that surrounding tissues, thereby damage over time. this solution has its limits; resulting ultrathin devices, typically based plastic films, lack necessary stretchability, restricting organs neither stretch nor grow.For practical deployments, must exhibit certain levels stretchability (ranging from 20 70%), tailored specific requirements target organs. Account, we outline recent advancements developing stretchable balance sufficient conductivity effective research, acting sensors stimulators. By concentrating pathways, summarize how meet various application needs examine effectiveness. We distinguish on-skin implantable uses, given vastly different requirements. Within each scope, highlight cutting-edge technologies, evaluating strengths shortcomings. Recognizing most current rely elastic films Young's modulus value ∼0.5 5 MPa, delve softer MEAs, particularly those using multifunctional hydrogels optimizing tissue-device interface address challenges adapting hydrogel-based implants. Additionally, transitioning soft lab fab connecting them rigid adapter machinery, highlighting critical challenge at soft-rigid due strain concentration, especially studies subject unforeseen strains. discuss innovative solutions integration challenge, being optimistic development durable, biocompatible, will significantly advance neuroscience related fields.

Язык: Английский

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Recent Advances of Stretchable Nanomaterial-Based Hydrogels for Wearable Sensors and Electrophysiological Signals Monitoring

Nanomaterials, Год журнала: 2024, Номер 14(17), С. 1398 - 1398

Опубликована: Авг. 27, 2024

Electrophysiological monitoring is a commonly used medical procedure designed to capture the electrical signals generated by body and promptly identify any abnormal health conditions. Wearable sensors are of great significance in signal acquisition for electrophysiological monitoring. Traditional devices often bulky have many complex accessories thus, only suitable limited application scenarios. Hydrogels optimized based on nanomaterials lightweight with excellent stretchable properties, solving problem high-quality wearable sensors. Therefore, development hydrogels brings tremendous potential physiological This review first introduces latest advancement made from different nanomaterials, such as nanocarbon materials, nanometal two-dimensional transition metal compounds, Second, versatile properties these composite hydrogel reviewed. Then, their applications various monitoring, electrocardiogram electromyographic analysis, electroencephalogram discussed. Finally, current status future prospects nanomaterial-optimized summarized. We hope this will inspire using nanomaterial-based hydrogels.

Язык: Английский

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High Ion-Conductive Hydrogel: Soft, Elastic, with Wide Humidity Tolerance and Long-Term Stability

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(44), С. 60992 - 61003

Опубликована: Окт. 23, 2024

Ion-conductive hydrogels have received great attention due to their significant potential in flexible electronics. However, achieving that simultaneously possess high ionic conductivity and stability under varying humidity conditions remains a challenge, limiting practical applications. Herein, we propose thermally controlled chemical cross-linking strategy prepare an elastic conductive hydrogel (ECH) of poly(vinyl alcohol) (PVA) with content H2SO4. The covalent cross-links formed effectively tackle the instability issue physically cross-linked PVA/H2SO4 conductivity, which were previously developed via polymer-in-salt strategy. We systematically investigated reaction clarified methods optimize hydroxyl dehydration PVA, resulting excellent mechanical properties ion simultaneously. ECH demonstrates impressive (up 392 ± 49 mS cm–1) elasticity (over 80% resilience upon stretching compression after being equilibrated at various levels for 24 days). Thanks water retention H2SO4 content, maintains exceeding 210 cm–1 over 420 days 50% relative (RH) retains 100 even 3 extremely dry (7% RH). These remarkable make ideal candidate applications requiring reliable diverse environmental conditions. Additionally, demonstrated can function as stretchable Joule heater conformability heating up objects curved surfaces. rate could reach fast ∼12 °C s–1 when human-safe alternating current voltage is below 36 V, attributed conductivity. believe performance ease fabrication our promising use electrolytes energy storage devices, electrolyte gates electrochemical transistors, artificial skin, often face long-term challenges

Язык: Английский

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Bionic Hydrogel-based Stretchable Devices for Bioelectronics Applications

Journal of Bionic Engineering, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Язык: Английский

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Interfacial Welding of Sulfur-Containing CNTs for an Elastic and Conductive Hydrogel with High-Accuracy Motion Sensing and Electrophysiology Acquisition

ACS Applied Electronic Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Язык: Английский

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Soft Materials and Devices Enabling Sensorimotor Functions in Soft Robots

Chemical Reviews, Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Sensorimotor functions, the seamless integration of sensing, decision-making, and actuation, are fundamental for robots to interact with their environments. Inspired by biological systems, incorporation soft materials devices into robotics holds significant promise enhancing these functions. However, current systems often lack autonomy intelligence observed in nature due limited sensorimotor integration, particularly flexible sensing actuation. As field progresses toward soft, flexible, stretchable materials, developing such becomes increasingly critical advanced robotics. Despite rapid advancements individually devices, combined applications enable capabilities emerging. This review addresses this emerging providing a comprehensive overview that functions robots. We delve latest development technologies, actuation mechanism, structural designs, fabrication techniques. Additionally, we explore strategies control, artificial (AI), practical application across various domains as healthcare, augmented virtual reality, exploration. By drawing parallels aims guide future research robots, ultimately adaptability unstructured

Язык: Английский

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