Journal of Materials Chemistry B, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Schematic diagram of the preparation and characteristics PAA-NHS/C-CS hydrogel.
Язык: Английский
Advanced Materials, Год журнала: 2023, Номер 36(6)
Опубликована: Ноя. 8, 2023
Abstract Gel materials are appealing due to their diverse applications in biomedicine, soft electronics, sensors, and actuators. Nevertheless, the existing synthetic gels often plagued by feeble network structures inherent defects associated with solvents, which compromise mechanical load‐bearing capacity cast persistent doubts about reliability. Herein, combined attractive deep eutectic solvent (DES), a stepwise‐enhanced strategy is presented fabricate ultrarobust eutectogels. It focuses on continuous modulation optimization of polymer networks through complementary annealing exchange processes, drives progressive increase both quantity mass interconnected chains at microscopic scale, hence contributing evolutionary enhancement structure. The resultant eutectogel exhibits superb properties, including record‐breaking strength (31.8 MPa), toughness (76.0 MJ m −3 ), Young's modulus (25.6 together exceptional resistance ability tear crack propagation. Moreover, this able be further programmed photolithography situ create patterned for imparting specific functionalities. Enhanced its broad applicability various DES combinations, poised serve as crucial template methodology future development robust gels.
Язык: Английский
Процитировано
62
Advanced Materials, Год журнала: 2023, Номер 36(11)
Опубликована: Ноя. 28, 2023
Abstract Wet‐adhesive hydrogels have been developed as an attractive strategy for tissue repair. However, achieving simultaneously low swelling and high burst pressure tolerance of wet‐adhesive is crucial in vivo application which remains challenges. Herein, a novel super‐structured porous hydrogel (denoted PVA/PAAc‐N + ) designed via facile moisture‐induced phase separation‐solvent exchange process obtaining polyvinyl alcohol (PVA) dissipative layer situ photocuring technology entangling quaternary ammonium‐functionalized poly(acrylic acid)‐based (PAAc‐N with the surface PVA layer. Benefitting from ionic crosslinking between ammonium ions carboxylate PAAc‐N well crystallinity induced by abundant hydrogen bonds layer, has unique ultralow property (0.29) without sacrificing adhesion strength (63.1 kPa). The structure facilitates mechanical interlock at interface tough leading to ultrahigh up 493 mm Hg effective repair porcine heart rupture; can prevent postoperative adhesion. By integrating swelling, tolerance, anti‐postoperative properties, shows appealing prospect
Язык: Английский
Процитировано
55
Advanced Functional Materials, Год журнала: 2023, Номер 33(33)
Опубликована: Апрель 25, 2023
Abstract Continuous temperature monitoring by flexible hydrogel‐based electronics achieves rapid advances, overcoming the drawbacks of rigid and unportable thermocouples. However, an open question is whether how thermosensitive hydrogel designing can prevent mechanical mismatching between devices skin‐tissues reduces interfacial failure. Herein, a versatile thermistor epidermal sensor (HTES) paradigm engineered consisting self‐adhesive function layer (PEST) in tandem with surface spraying Ag interdigital electrode. Leveraging advantage catechol chemistry inspired tannic acid‐coated cellulose nanocrystals, resultant PEST adhesion‐cohesion equilibrium along superior thermosensitivity. The assembled HTES thereby yields unprecedented features thermosensitivity (TCR = 1.43% °C −1 ), exceptional integrity (hammering 200 cycles, current variation <9%), impressive compatibility (adhesion strength, 25 kPa), environmental stability (thermosensation retention 98% over 5 days). By in‐situ microstructure observation, unique geometrical synchronization arbitrary curvilinear surfaces (e.g., sphere, cone, saddle) stemming from elastic dissipation discrete rupture adhesive fibrillar bridges validated, affording competitive advantages than that state‐of‐the‐art for alleviating deterioration, which dramatically inspires advanced design strategies paves way commercialization attachable electronics.
Язык: Английский
Процитировано
51
Progress in Materials Science, Год журнала: 2024, Номер unknown, С. 101378 - 101378
Опубликована: Сен. 1, 2024
Язык: Английский
Процитировано
34
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Май 11, 2024
Abstract The continuously growing utilization of wound healing materials and skin bioelectronics urges the development flexible hydrogels for personal therapy health management. Versatile conductive prepared from natural biomass are ideal candidates as one promising solutions chronic Here, study proposes a kind robust (strain: 1560.8%), adhesive, self‐healing, injectable, antibacterial (sterilization rate: 99%), near‐infrared (NIR) photothermal responsive, biocompatible, hydrogel (CPPFe@TA) composed carboxymethyl cellulose tannic acid/iron ion complex (TA@Fe 3+ ), featuring rapid self‐assembly tunable crosslinking time. TA@Fe facilitated self‐catalysis polymerization reaction, time could be controlled by adjusting Fe concentration. Under NIR irradiation, exhibited remarkable performance. In full‐thickness defect repair experiment on mice, dressing significantly enhanced healing. After 14 days, rate (95.49%) CPPFe@TA3 + treatment greatly exceeded that commercial dressings. Meanwhile, has good electrical conductivity thermo‐responsiveness, making them in physiological signal monitoring rehabilitation exercise This work therefore offers strategy developing versatile biomass‐based hydrogels, which is expected to applicable integrated regenerative bioelectronics.
Язык: Английский
Процитировано
31
Advanced Functional Materials, Год журнала: 2024, Номер 34(33)
Опубликована: Март 29, 2024
Abstract Reliable interfacial bonding is an essential guarantee that flexible electronics can output realistic signals, especially for underwater scenes. However, conventional self‐adhesive materials usually suffer from adhesion failure, conflict between and cohesion, as well adverse effects of isotropous residue, greatly limiting their applications in electronics. Herein, a Janus hydrophobic structural gel (HSG) with asymmetric fabricated by “grafting one twig on another” approach (in situ constructing anti‐adhesive the top gel). The layer long C18 aliphatic chains achieves reliable (interfacial toughness exceeds 80 J m −2 ) assistance high mobility polymer chains, multiple interactions, effective removal liquid. anti‐adhesion containing poly(ionic liquid) more robust due to electrostatic ion‐dipole ensuring mechanical strength integral HSG. Such heterostructure avoids common nonessential facilitating operation. intrinsic hydrophobicity HSG also prevents water erosion, achieving sensing. As result, assembled sensor based stably monitor human motions wirelessly transmit information, exhibiting enormous potential wearable
Язык: Английский
Процитировано
29
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
Процитировано
24
Energy & Environmental Science, Год журнала: 2024, Номер 17(12), С. 4126 - 4136
Опубликована: Янв. 1, 2024
A pioneering achievement is made in developing integrated Janus hydrogel electrolytes featuring gradient pores cross-section and varying hydrophilicities on surfaces. This novel enables Zn-ion batteries to exhibit excellent performance.
Язык: Английский
Процитировано
23
Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155195 - 155195
Опубликована: Авг. 27, 2024
Язык: Английский
Процитировано
20
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 29, 2025
Abstract With the increasing demand in fields such as wearable sensors, soft robotics, tissue engineering, and wound dressings, development of hydrogels with strong adhesion wet environments has become a critical focus research. However, most existing adhesive materials lack ability to transition rapidly reversibly between nonadhesive states, their is often limited single environment. In this study, smart interfacial hydrogel tunable properties across diverse liquid presented. By tailoring interchain interactions leveraging electrostatically induced traction hydrophilic hydrophobic chain segments, achieves reversible modulation response temperature changes while maintaining adhesion. Notably, its strength at elevated temperatures (45 °C) approximately three times greater than lower (5 °C). The exhibits an 227 kPa aqueous 213 oil‐containing environments. This innovative design strategy enables exhibit broad switchable, dynamic capabilities, unlocking significant potential for wide range applications.
Язык: Английский
Процитировано
3