ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 26, 2024
Language: Английский
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
Citations
22
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 10, 2024
Skeletal muscles represent a role model in soft robotics featuring agile locomotion and incredible mechanical robustness. However, existing actuators lack an optimal combination of actuation parameters (including modes, work capacity, strength, damage repair) to rival biological tissues. Here, biomimetic structural design strategy via multilevel relaxations (α/β/γ/δ-relaxation) modulation is proposed for robust healable actuator materials with muscle-like diastole contraction abilities by orientational alignment dendritic polyphenol-modified nano-assembles eutectogels. The anisotropic hierarchical micro-nanostructures assembled supramolecular interaction mimic the relative slippage actin filaments myosin muscles, ensuring bistable through rapid thermal α-relaxation expansion. Furthermore, kinetically active secondary β/γ/δ-relaxation at reconfigurable interfaces can conquer limited self-healing ability fixed-orientation polymeric chains. obtained artificial muscle exhibits high output actuation, properties (tensile strength 33.5 MPa), desired functional, efficiency (89.7%), exceeding typical natural living systems. bionic micro-nano achieves bottom-up cooperative relaxation integrate all-round performance which paves way substantial advancements next-generation intelligent robotics.
Language: Английский
Citations
15
International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: unknown, P. 137123 - 137123
Published: Oct. 1, 2024
Language: Английский
Citations
9
Macromolecular Chemistry and Physics, Journal Year: 2025, Volume and Issue: unknown
Published: March 5, 2025
Abstract This study introduces a novel design for pH‐sensitive bilayer Janus hydrogels with bidirectional bending capabilities, achieved through the layer‐by‐layer polymerization of two distinct hydrogel layers. The upper layer, composed P(HEMA ‐co‐ 4VP), swells in acidic environments due to protonation pyridine groups, inducing toward one side. Conversely, lower made AA), expands alkaline conditions by deprotonation, causing opposite direction. demonstrates significant shape deformations, influenced variations layer thickness and pH conditions. Detailed analyses swelling behaviors, compressive toughness, rheological properties reveal that unique composition ensures tunable mechanical responses. Furthermore, fabricated into complex geometries, such as flower‐ starfish‐shaped structures, showcase practical applications soft robotics biomimetic devices. versatility is further confirmed substituting 4VP) DMAEMA), which maintained responses under both research theoretical understanding stimulus‐responsive offers an innovative platform designing intelligent actuators adaptable diverse dynamic environments.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 26, 2025
Abstract Zwitterionic hydrogels have attracted intensive attentions for their exceptional hydration and anti‐fouling properties, while the exploration rational structural designs to achieve multi‐function superior anti‐freezing capability remains an ongoing mission. Herein, a new multi‐functional zwitterionic monomer (ACHPES) is designed developed from which novel are fabricated. The pyridinium‐sulfonate motif endows hydrogel with discoloration in both visible light fluorescence response pH stimulus, enabling unique multi‐channel information encryption highly sensitive Cu 2+ detection threshold of 0.64 ppm. design carbamate group fulfils high bonding capacity water, leading capability. As such, exhibit extremely low water freezing point −47.3 °C breaking elongation ≈500% at −20 °C. outstanding enables sensors electrolytes excellent operational performance temperatures. This innovative strategy offers avenue functionalization application icy temperature.
Language: Английский
Citations
1
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 11, 2024
Abstract Reprogrammable shape morphing is ubiquitous in living beings and highly crucial for them to move normal situations, even survive under dangerous conditions. There increasing interest using asymmetric hydrogel structures understand mimic beings’ upon an external trigger a controlled way. However, these or heterogeneous configurations cannot be further modified once the polymer hydrogels are prepared. Therefore, it great challenge achieve reprogrammable existing hydrogels. Inspired by marine amoebae, which transform into several different morphologies according various salt concentrations, new strategy developed salting reconfigure their anisotropy toward morphing. Polyampholyte with equal stoichiometric COO − N + (CH 3 ) groups were first swollen HCl/NaCl solution. After being then transferred water, they again water uptake driven osmotic pressure, spontaneously deswollen due increase internal pH dialysis of ions leading deprotonation COOH regeneration /N electrostatic attraction. This work provides novel soft actuators open up avenue
Language: Английский
Citations
5
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)
Published: Aug. 13, 2024
Abstract Smart actuators hold great potential in soft robotics and sensors, but their movement at the fluid interface is less understood controlled, hindering performances applications complicated fluids. Here an ethanol‐containing polyelectrolyte actuator prepared that demonstrates excellent actuating performance via Marangoni effect. These exhibit enduring (17 min), repeatable (50 cycles), autonomous motion on water surface. More importantly, of are dependent shapes. Polygonal with more edges round attached to walls containers, while few move randomly. On basis this property, circular can pass through pipe bends S‐shaped complex geometry. unique advantages lend successful wireless sensing (standard 0–5 V level signals) for locating obstructions inside invisible pipes continuous energy harvesting (7700 nC per cycle) micro mechanical energy.
Language: Английский
Citations
4
Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 2, 2025
Language: Английский
Citations
0
Chinese Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 10, 2025
Language: Английский
Citations
0
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 5, 2025
Abstract Hydrogels in water or aqueous solutions swell shrink unidirectionally until reaching an equilibrium state, which has been extensively studied through both experimental analysis and theoretical prediction. In this work, unexpected concurrent swelling deswelling behavior of hydrogels is reported, manipulates the state polymer networks. The osmotic pressure‐driven rapid ionic electrostatic repulsion‐driven slow occur simultaneously, affording double‐layered polyacrylamide (PAM) hydrogels, rigid inner layer does not contains free water, while soft outer comprises bound water. PAM show uniaxial tensile fracture strengths Young's moduli up to 104.2 MPa 2.4 GPa, respectively, outperforming various polymeric biological structural materials. This strategy applicable general molding three‐dimensional (3D) printing techniques, providing wide possibilities for engineering applications. Such strong can simultaneously serve as materials load‐bearing act functional super‐stress (25 6000 N) highly adaptable tactile sensing. These findings enrich hydrogel swell/deswelling theory broaden applications
Language: Английский
Citations
0