An Ultrahigh‐Modulus Hydrogel Electrolyte for Dendrite‐Free Zinc Ion Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 14, 2024

Abstract Quasi‐solid‐state aqueous zinc ion batteries suffer from anodic dendrite growth during plating/stripping processes, impeding their commercial application. The inhibition of dendrites by high‐modulus electrolytes has been proven to be effective. However, hydrogel are difficult achieve high modulus owing inherent water contents. This work reports a electrolyte with ultrahigh that can overcome the stress through mechanical suppression effect. By combining wet‐annealing, solvent‐exchange, and salting‐out processes tuning hydrophobic crystalline domains, is obtained substantial content (≈70%), (198.5 MPa), toughness (274.3 MJ m −3 ), zinc‐ion conductivity (28.9 mS cm −1 which significantly outperforms previously reported poly(vinyl alcohol)‐based hydrogels. As result, exhibits excellent dendrite‐suppression effect achieves stable performance in Zn||Zn symmetric (1800 h cycle life at 1 mA −2 ). Moreover, Zn||V 2 O 5 pouch display cycling operate stably even under extreme conditions, such as large bending angle (180°) automotive crushing. provides promising approach for designing mechanically reliable advanced batteries.

Language: Английский

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Tough Supramolecular Hydrogels Crafted via Lignin‐Induced Self‐Assembly

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 10, 2024

Abstract Supramolecular hydrogels are typically assembled through weak non‐covalent interactions, posing a significant challenge in achieving ultra strength. Developing higher strength based on molecular/nanoscale engineering concepts is potential improvement strategy. Herein, super‐tough supramolecular hydrogel by gradually diffusing lignosulfonate sodium (LS) into polyvinyl alcohol (PVA) solution. Both simulations and analytical results indicate that the assembly subsequent enhancement of crosslinked network primarily attributed to LS‐induced formation gradual densification strong crystalline domains within hydrogel. The optimized exhibits impressive mechanical properties with tensile ≈20 MPa, Young's modulus ≈14 toughness ≈50 MJ m⁻ 3 , making it strongest lignin‐PVA/polymer known so far. Moreover, LS provides excellent low‐temperature stability (<‐60 °C), antibacterial, UV‐blocking capability (≈100%). Interestingly, diffusion ability demonstrated for self‐restructuring damaged hydrogel, 3D patterning surfaces, enhancing local freeze‐thaw PVA goal foster versatile platform combining eco‐friendly biocompatible PVA, paving way innovation interdisciplinarity biomedicine, materials, forestry science.

Language: Английский

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High‐Strength, Antiswelling Directional Layered PVA/MXene Hydrogel for Wearable Devices and Underwater Sensing

Advanced Science, Journal Year: 2024, Volume and Issue: 11(39)

Published: Aug. 20, 2024

Abstract Hydrogel sensors are widely utilized in soft robotics and tissue engineering due to their excellent mechanical properties biocompatibility. However, high‐water environments, traditional hydrogels can experience significant swelling, leading decreased electrical performance, potentially losing shape, sensing capabilities. This study addresses these challenges by leveraging the Hofmeister effect, coupled with directional freezing salting‐out techniques, develop a layered, high‐strength, tough, antiswelling PVA/MXene hydrogel. In particular, process enhances self‐entanglement of PVA, resulting an S‐PM hydrogel tensile strength up 2.87 MPa. Furthermore, retains its structure after 7 d only 6% change resistance. Importantly, performance is improved postswelling, capability rarely achievable hydrogels. Moreover, demonstrates faster response times more stable resistance rates underwater tests, making it crucial for long‐term continuous monitoring challenging aquatic ensuring sustained operation monitoring.

Language: Английский

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Superporous sponge prepared by secondary network compaction with enhanced permeability and mechanical properties for non-compressible hemostasis in pigs

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 27, 2024

Abstract Developing superporous hemostatic sponges with simultaneously enhanced permeability and mechanical properties remains challenging but highly desirable to achieve rapid hemostasis for non-compressible hemorrhage. Typical approaches improve the of by increasing porosity sacrifice yield limited pore interconnectivity, thereby undermining efficacy subsequent tissue regeneration. Herein, we propose a temperature-assisted secondary network compaction strategy following phase separation-induced primary fabricate chitosan sponge highly-interconnected porous structure, blood absorption rate capacity, fatigue resistance. The exhibits shape recovery after absorbing maintains sufficient pressure on wounds build robust physical barrier greatly efficiency. Furthermore, outperforms commercial gauze, gelatin sponges, powder enhancing efficiency, cell infiltration, vascular regeneration, in-situ regeneration in organ injury models, respectively. We believe proposed provides simple yet effective method diverse clinical applications.

Language: Английский

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Polymer gels for aqueous metal batteries

Progress in Materials Science, Journal Year: 2025, Volume and Issue: unknown, P. 101426 - 101426

Published: Jan. 1, 2025

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Strong and tough polyvinyl alcohol hydrogels with high intrinsic thermal conductivity

Soft Science, Journal Year: 2025, Volume and Issue: 5(1)

Published: Jan. 26, 2025

Although polyvinyl alcohol (PVA) hydrogels display huge potential in tissue engineering, flexible and wearable electronic devices soft robotics, their low intrinsic thermal conductivity weak mechanical properties severely limit wider applications these areas. Herein, a Hofmeister effect-assisted “directional freezing-stretching” tactic is employed for simultaneously enhancing the conduction of PVA hydrogels. The are obtained through directional freezing followed by salting-out treatment subsequent stretching (DFS). DFS hydrogel with 15 wt% ratio 4 (DFS4) exhibits highest 1.25 W/(m·K), which 2.4 2.8 times that prepared frozen-thawed (FT) [0.52 W/(m·K)] frozen-salted out (FS) [0.45 methods, respectively. DFS4 also possesses greatly improved performances, exhibiting an elongation at break 163.1%. In addition, tensile strength, toughness, elastic modulus significantly increase to 27.1 MPa, 25.3 MJ·m-3, 21.5 MPa from 0.4 0.32 0.07 FT hydrogels, It elucidated effect generates hydrophobic crystalline regions, while enhance chain orientation strategy. These effects synergistically contribute improvement

Language: Английский

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Engineered Living Systems Based on Gelatin: Design, Manufacturing, and Applications

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Engineered living systems (ELSs) represent purpose-driven assemblies of components, encompassing cells, biomaterials, and active agents, intricately designed to fulfill diverse biomedical applications. Gelatin its derivatives have been used extensively in ELSs owing their mature translational pathways, favorable biological properties, adjustable physicochemical characteristics. This review explores the intersection gelatin with fabrication techniques, offering a comprehensive examination synergistic potential creating for various applications biomedicine. It offers deep dive into gelatin, including structures production, sources, processing, properties. Additionally, techniques employing derivatives, generic microfluidics, 3D printing methods. Furthermore, it discusses based on regenerative engineering as well cell therapies, bioadhesives, biorobots, biosensors. Future directions challenges are also examined, highlighting emerging trends areas improvements innovations. In summary, this underscores significance gelatin-based advancing lays groundwork guiding future research developments within field.

Language: Английский

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High‐Strength Gelatin Hydrogel Scaffold with Drug Loading Remodels the Inflammatory Microenvironment to Enhance Osteoporotic Bone Repair

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Abstract Osteoporosis is a widespread condition that induces an inflammatory microenvironment, limiting the effectiveness of conventional therapies and presenting significant challenges for bone defect repair. To address these issues, high‐strength gelatin hydrogel scaffold loaded with roxadustat developed, specifically designed to remodel microenvironment enhance osteoporotic regeneration. By incorporating minimal methacrylated hyaluronic acid (HAMA) into o ‐nitrobenzyl functionalized (GelNB) matrix, fracture strength 10 MPa achieved, providing exceptional structural stability enabling precise fabrication through digital light processing (DLP) 3D printing. Validated cell experiments animal studies, supports adhesion migration, offers excellent tissue compatibility, fully degradable, meeting requirements therapeutic scaffold. Including further enhances scaffold's functionality by regulating via hypoxia‐inducible factor‐1α (HIF‐1α) signaling, significantly improving repair in models. This drug‐loaded effectively addresses inflammation‐induced limitations regenerative capacity affected area, paving way improved outcomes

Language: Английский

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Periodate oxidation-mediated nanocelluloses: Preparation, functionalization, structural design, and applications

Carbohydrate Polymers, Journal Year: 2024, Volume and Issue: 341, P. 122305 - 122305

Published: May 29, 2024

In recent years, the remarkable progress in nanotechnology has ignited considerable interest investigating nanocelluloses, an environmentally friendly and sustainable nanomaterial derived from cellulosic feedstocks. Current research primarily focuses on preparation applications of nanocelluloses. However, to enhance efficiency nanofibrillation, reduce energy consumption, expand nanocellulose applications, chemical pre-treatments cellulose fibers have attracted substantial extensive exploration. Various pre-treatment methods yield nanocelluloses with diverse functional groups. Among these methods, periodate oxidation garnered significant attention recently, due formation dialdehyde nanocellulose, which exhibits great promise for further modification various This review seeks provide a comprehensive in-depth examination oxidation-mediated (PONCs), including their preparation, functionalization, hierarchical structural design, applications. We believe that PONCs stand as highly promising candidates development novel nano-cellulosic materials.

Language: Английский

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A biocompatible, highly adhesive zwitterionic polymer hydrogel with high ionic conductivity, anti-freezing and moisturizing for wearable strain sensor

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 490, P. 151691 - 151691

Published: April 27, 2024

Language: Английский

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