Tough Supramolecular Hydrogels Crafted via Lignin‐Induced Self‐Assembly

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 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.

Язык: Английский

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

Advanced Science, Год журнала: 2024, Номер 11(39)

Опубликована: Авг. 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.

Язык: Английский

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

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 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.

Язык: 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, Год журнала: 2024, Номер 15(1)

Опубликована: Июнь 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.

Язык: Английский

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

Carbohydrate Polymers, Год журнала: 2024, Номер 341, С. 122305 - 122305

Опубликована: Май 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.

Язык: Английский

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Polymer gels for aqueous metal batteries

Progress in Materials Science, Год журнала: 2025, Номер unknown, С. 101426 - 101426

Опубликована: Янв. 1, 2025

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Strong and tough polyvinyl alcohol hydrogels with high intrinsic thermal conductivity

Soft Science, Год журнала: 2025, Номер 5(1)

Опубликована: Янв. 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

Язык: 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, Год журнала: 2024, Номер 490, С. 151691 - 151691

Опубликована: Апрель 27, 2024

Язык: Английский

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High‐Performance Organic–Inorganic Hybrid Conductive Hydrogels for Stretchable Elastic All‐Hydrogel Supercapacitors and Flexible Self‐Powered Integrated Systems

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Июль 8, 2024

Conductive polymer hydrogels exhibit unique electrical, electrochemical, and mechanical properties, making them highly competitive electrode materials for stretchable high-capacity energy storage devices cutting-edge wearable electronics. However, it remains extremely challenging to simultaneously achieve large stretchability, high electrical conductivity, excellent electrochemical properties in conductive because introducing soft insulating networks improving stretchability inevitably deteriorates the connectivity of rigid domain decreases conductivity activity. This work proposes a distinct confinement self-assembly multiple crosslinking strategy develop new type organic-inorganic hybrid with biphase interpenetrating cross-linked networks. The (2000 S m

Язык: Английский

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Mechanical Regulation of Polymer Gels

Chemical Reviews, Год журнала: 2024, Номер 124(18), С. 10435 - 10508

Опубликована: Сен. 16, 2024

The mechanical properties of polymer gels devote to emerging devices and machines in fields such as biomedical engineering, flexible bioelectronics, biomimetic actuators, energy harvesters. Coupling network architectures interactions has been explored regulate supportive characteristics gels; however, systematic reviews correlating mechanics interaction forces at the molecular structural levels remain absent field. This review highlights engineering gel a comprehensive mechanistic understanding regulation. Molecular alters architecture manipulates functional groups/moieties level, introducing various permanent or reversible dynamic bonds dissipative energy. usually uses monomers, cross-linkers, chains, other additives. Structural utilizes casting methods, solvent phase regulation, mechanochemistry, macromolecule chemical reactions, biomanufacturing technology construct tailor topological structures, heterogeneous modulus compositions. We envision that perfect combination may provide fresh view extend exciting new perspectives this burgeoning also summarizes recent representative applications with excellent properties. Conclusions are provided from five aspects concise summary, mechanism, biofabrication upgraded applications, synergistic methodology.

Язык: Английский

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