A5045619595- Advanced Sensor and Energy Harvesting Materials
- Advanced Materials and Mechanics
- Hydrogels: synthesis, properties, applications
- Pain Mechanisms and Treatments
- Micro and Nano Robotics
- Neuropeptides and Animal Physiology
- Neuroscience and Neuropharmacology Research
- Textile materials and evaluations
- Neurotransmitter Receptor Influence on Behavior
- Surgical Sutures and Adhesives
- Electrospun Nanofibers in Biomedical Applications
- Transcranial Magnetic Stimulation Studies
- Polymer composites and self-healing
- Receptor Mechanisms and Signaling
- Ion channel regulation and function
- Polymer Surface Interaction Studies
- Modular Robots and Swarm Intelligence
- Additive Manufacturing and 3D Printing Technologies
- Mechanical Behavior of Composites
- Dielectric materials and actuators
- Tactile and Sensory Interactions
- Characterization and Applications of Magnetic Nanoparticles
- Structural Analysis and Optimization
- Elasticity and Material Modeling
- Mechanisms of cancer metastasis
Xi'an Jiaotong University
2012-2025
Civil Aviation University of China
2021
China XD Group (China)
2019
Harvard University
2015-2017
Dalian University of Technology
2017
Peking University
1995-2016
State Key Laboratory of Turbulence and Complex Systems
2015-2016
China University of Petroleum, East China
2014
National Institute on Drug Abuse
2013
National Institutes of Health
2013
Shape-morphing hydrogels have found a myriad of applications in biomimetics, soft robotics, and biomedical engineering. A magnetic field is favorable for specific hydrogels, since it noncontact biocompatible at high strengths. However, most magnetosensitive shape-morphing structures are made elastomers rather than because the magnetization usually too low to be actuated under static field. Here, we propose strategy achieve shape morphing hydrogels. We actuate magnetothermal sensitive by an...
Abstract Many recently demonstrated devices require the integration of hydrogels and hydrophobic elastomers. Extrusion print is a promising method for rapid prototyping but existing approaches do not fulfill basic requirement: integrated structures hydrogel an elastomer, in arbitrary sequence, with strong adhesion. This paper demonstrates approach to this requirement. During print, ink each material flows through nozzle under pressure gradient retains shape against gravity capillarity. cure,...
Hydrogels of numerous chemical compositions have achieved high fracture toughness on the basis one physical principle. As a crack advances in such hydrogel, polymer network strong bonds ruptures at front and elicits energy dissipation bulk hydrogel. The constituent that dissipates hydrogel is called toughener. A hypothesis has emerged recently tougheners increase greatly but contribute little to fatigue threshold. Here we ascertain this by studying hydrogels two kinds, identical all aspects...
Recently developed high-speed ionic devices require adherent laminates of stretchable and dissimilar materials, such as gels elastomers. Adhesion between materials also plays important roles in medicine, electronics, soft robots. Here we develop a method to characterize adhesion capable large, elastic deformation. We apply the measure debond energy elastomer-hydrogel bilayers. The an acrylic elastomer polyacrylamide hydrogel is found be about 0.5 J m(-2), independent thickness crosslink...
Soft 2D structures based on tough magnetic hydrogels can be remotely triggered to evolve into 3D shapes in a field.
A mechanically strong, ion-resistant and magnetoactive double network hydrogel has been developed used for biomedical applications.
Magnetically driven small‐scale soft robots are promising for applications in biomedicine, due to their fast, programmable deformation, and remote, untethered actuation accomplish complicated tasks. Although diverse materials designs have been proposed magnetic with shape transformation, it is still challenging produce strong by a small field. Inspired arthropod species, millirobots joint structures 3D printing hydrogels developed. The joints can turn the bending deformation into folding...
A stretchable hydrogel sensor has been developed with a high fatigue threshold, low hysteresis, and resolution of strain sensing capability.
Transparent heaters (THs) are widely used for various applications, such as in smart windows, deicers, defoggers, displays, and thermotherapy pads. The rapid development of flexible electronics has led to a demand even stretchable THs. At present, most THs designed using combination electronically conductive networks polymer materials. Electronic still face common challenges, transparency-conductance trade-off, non-uniform heating, poor interfacial adhesion. In this work, an ionic TH is...
Bovine pericardium (BP) has been used as leaflets of prosthetic heart valves. The are sutured on metallic stents and can survive 400 million flaps (~10-year life span), unaffected by the suture holes. This flaw-insensitive fatigue resistance is unmatched synthetic leaflets. We show that endurance strength BP under cyclic stretch insensitive to cuts long 1 centimeter, about two orders magnitude longer than a thermoplastic polyurethane (TPU). results from high collagen fibers soft matrix...
Adhesives potentially offer convenient means to close wounds, but existing adhesives do not fulfill many common requirements. Here we demonstrate an approach develop hydrogel that are strong initially, remain soft when adhered tissues, and degrade over time. We the by using a dissipates large amount of energy during separation, forms interlinks with degrades breaking cross-links. The achieves initial adhesion energies 300-700 J/m2 different can bear huge pressure, completely in 5 weeks under...
Many stretchable electronic devices require hermetic seals. However, stretchability and permeability are inextricably linked at the molecular level: stretchable, low-permeability materials do not exist. We collect data for permeation of water oxygen in many describe scaling relations both flat wrinkled Whereas seals struggle to fulfill simultaneous requirements stretchability, low stiffness, transmissibility, can them readily. further explore behavior under cyclic stretch using aluminum,...
Abstract Stiffness and fatigue threshold are important material parameters in load-carrying applications. However, it is impossible to achieve both high stiffness for single-network elastomers hydrogels. As the polymer chain length increases, reduces, but increases. Here, we show that this stiffness-threshold conflict resolved double-network hydrogels, where depends on short-chain network, long-chain network. Experimental data literature have shown of hydrogels inversely proportional In...
A microgel-reinforced magnetic hydrogel embedded with hard particles has been prepared for fast and complex shape changing.
Magnetoactive soft millirobots have made significant advances in programmable deformation, multimodal locomotion, and untethered manipulation unreachable regions. However, the inherent limitations are manifested solid-phase millirobot as limited deformability liquid-phase low stiffness. Herein, we propose a ternary-state magnetoactive based on phase transitional polymer embedded with magnetic nanoparticles. The can reversibly transit among liquid, solid, viscous-fluid phases through heating...