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Journal articles on the topic 'Ultra-Soft Hydrogels'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Xie, Beixin, Peidong Xu, Liqun Tang, et al. "Dynamic Mechanical Properties of Polyvinyl Alcohol Hydrogels Measured by Double-Striker Electromagnetic Driving SHPB System." International Journal of Applied Mechanics 11, no. 02 (2019): 1950018. http://dx.doi.org/10.1142/s1758825119500182.

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As an ultra-soft material (elastic modulus in magnitude of kPa), polyvinyl alcohol (PVA) hydrogels have the potential to substitute articular cartilage, but the measurement of the dynamic stress–strain relations of ultra-soft materials is still challenging. In this paper, a double-striker electromagnetic driving split-Hopkinson pressure bar (SHPB) system was developed, in which all the bars were made of polycarbonate, and the polycarbonate striker was pushed by a metal striker driven electromagnetically to ensure the precise control of impact velocity. With the new SHPB system, well design of

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Xu, Zhenyu, Yongsen Zhou, Baoping Zhang, Chao Zhang, Jianfeng Wang, and Zuankai Wang. "Recent Progress on Plant-Inspired Soft Robotics with Hydrogel Building Blocks: Fabrication, Actuation and Application." Micromachines 12, no. 6 (2021): 608. http://dx.doi.org/10.3390/mi12060608.

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Millions of years’ evolution has imparted life on earth with excellent environment adaptability. Of particular interest to scientists are some plants capable of macroscopically and reversibly altering their morphological and mechanical properties in response to external stimuli from the surrounding environment. These intriguing natural phenomena and underlying actuation mechanisms have provided important design guidance and principles for man-made soft robotic systems. Constructing bio-inspired soft robotic systems with effective actuation requires the efficient supply of mechanical energy gen

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3

Strachota, Beata, Adam Strachota, Leana Vratović, et al. "Exceptionally Fast Temperature-Responsive, Mechanically Strong and Extensible Monolithic Non-Porous Hydrogels: Poly(N-isopropylacrylamide) Intercalated with Hydroxypropyl Methylcellulose." Gels 9, no. 12 (2023): 926. http://dx.doi.org/10.3390/gels9120926.

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Exceptionally fast temperature-responsive, mechanically strong, tough and extensible monolithic non-porous hydrogels were synthesized. They are based on divinyl-crosslinked poly(N-isopropyl-acrylamide) (PNIPAm) intercalated by hydroxypropyl methylcellulose (HPMC). HPMC was largely extracted after polymerization, thus yielding a ‘template-modified’ PNIPAm network intercalated with a modest residue of HPMC. High contents of divinyl crosslinker and of HPMC caused a varying degree of micro-phase-separation in some products, but without detriment to mechanical or tensile properties. After extractio

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4

Juliar, Benjamin A., Jeffrey A. Beamish, Megan E. Busch, David S. Cleveland, Likitha Nimmagadda, and Andrew J. Putnam. "Cell-mediated matrix stiffening accompanies capillary morphogenesis in ultra-soft amorphous hydrogels." Biomaterials 230 (February 2020): 119634. http://dx.doi.org/10.1016/j.biomaterials.2019.119634.

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5

Zhang, Aoxiang, Huiying Zhou, Yanhui Guo, and Yu Fu. "Marangoni Flow-Driven Self-Assembly of Biomimetic Jellyfish-like Hydrogels for Spatially Controlled Enzyme Catalysis." Surfaces 8, no. 2 (2025): 28. https://doi.org/10.3390/surfaces8020028.

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Enzymatic catalysis has gained significant attention in green chemistry due to its high specificity and efficiency under mild conditions. However, challenges related to enzyme immobilization and spatial control often limit its practical applications. In this work, we report a Marangoni flow-driven strategy to fabricate a biomimetic jellyfish-like hydrogel with tunable tentacle-like structures. The formation process occurs entirely in an aqueous system without organic solvents or post-treatment, enabling the construction of ultra-thin, free-standing hydrogels through spontaneous interfacial sel

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Huang, Shan, Weibin Wang, Chao Yang, et al. "Highly Stretchable Conductive Hydrogel-Based Flexible Triboelectric Nanogenerators for Ultrasensitive Tactile Sensing." Polymers 17, no. 3 (2025): 342. https://doi.org/10.3390/polym17030342.

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Wearable electronic devices have shown great application prospects in the fields of tactile sensing, electronic skin, and soft robots. However, the existing wearable electronic devices face limitations such as power supply challenges, lack of portability, and discomfort, which restrict their applications. The invention of triboelectric nanogenerators (TENGs) with dual functions of energy harvesting and sensing provides an innovative solution to address these issues. This study prepared a highly stretchable conductive hydrogel using doped conducting polymer poly(3,4-ethylenedioxythiophene):poly

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7

Sanjuan-Alberte, Paola, Jayasheelan Vaithilingam, Jonathan C. Moore, et al. "Development of Conductive Gelatine-Methacrylate Inks for Two-Photon Polymerisation." Polymers 13, no. 7 (2021): 1038. http://dx.doi.org/10.3390/polym13071038.

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Conductive hydrogel-based materials are attracting considerable interest for bioelectronic applications due to their ability to act as more compatible soft interfaces between biological and electrical systems. Despite significant advances that are being achieved in the manufacture of hydrogels, precise control over the topographies and architectures remains challenging. In this work, we present for the first time a strategy to manufacture structures with resolutions in the micro-/nanoscale based on hydrogels with enhanced electrical properties. Gelatine methacrylate (GelMa)-based inks were for

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Gori, M., S. M. Giannitelli, G. Vadalà, et al. "A POLY(SBMA) ZWITTERIONIC HYDROGEL COATING OF POLYIMIDE SURFACES TO REDUCE THE FOREIGN BODY REACTION TO INVASIVE NEURAL INTERFACES." Orthopaedic Proceedings 105-B, SUPP_7 (2023): 20. http://dx.doi.org/10.1302/1358-992x.2023.7.020.

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Intraneural electrodes can be harnessed to control neural prosthetic devices in human amputees. However, in chronic implants we witness a gradual loss of device functionality and electrode isolation due to a nonspecific inflammatory response to the implanted material, called foreign body reaction (FBR). FBR may eventually lead to a fibrous encapsulation of the electrode surface. Poly(ethylene glycol) (PEG) is one of the most common low-fouling materials used to coat and protect electrode surfaces. Yet, PEG can easily undergo encapsulation and oxidative damage in long-term in vivo applications.

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9

Wu, Meng, Jingsi Chen, Yuhao Ma, et al. "Ultra elastic, stretchable, self-healing conductive hydrogels with tunable optical properties for highly sensitive soft electronic sensors." Journal of Materials Chemistry A 8, no. 46 (2020): 24718–33. http://dx.doi.org/10.1039/d0ta09735g.

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A self-healing hydrogel ionic conductor has been developed by combining dynamic covalent chemistry with nanofiller reinforcement and micelle crosslinking, and used for sensing of diverse human activities.

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Liu, Yunsong, and Xiong Zheng. "Bio-Inspired Double-Layered Hydrogel Robot with Fast Response via Thermo-Responsive Effect." Materials 17, no. 15 (2024): 3679. http://dx.doi.org/10.3390/ma17153679.

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Bio-inspired hydrogel robots have become promising due to their advantage of the interaction safety and comfort between robots and humans, while current hydrogel robots mainly focus on underwater movement due to the hydration–dehydration process of thermo-responsive hydrogels, which greatly limits their practical applications. To expand the motion of the thermo-responsive hydrogel robot to the ground, we constructed a hydrogel robot inspired by a caterpillar, which has an anisotropic double-layered structure by the interfacial diffusion polymerization method. Adding PVA and SA to PNIPAm will c

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Musgrave, Christopher, Lorcan O’Toole, Tianyu Mao, Qing Li, Min Lai, and Fengzhou Fang. "Manufacturing of Soft Contact Lenses Using Reusable and Reliable Cyclic Olefin Copolymer Moulds." Polymers 14, no. 21 (2022): 4681. http://dx.doi.org/10.3390/polym14214681.

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We present experimental evidence of reusable, reliable cyclic olefin copolymer (COC) moulds in soft contact lens manufacturing. The moulds showed high performance surface roughness characteristics despite >20 kW exposure to 365 nm ultraviolet (UV) light from repeated use. Ultra-precision manufacturing techniques were used to fabricate transparent COC mould inserts and to produce soft contact lenses from liquid monomer compositions. Both polymer and silicone hydrogels were fabricated with more than 60 individual uses of the moulds. White light interferometry measured the surface roughness (S

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12

Francis, Lydia, Karin V. Greco, Aldo R. Boccaccini, et al. "Development of a novel hybrid bioactive hydrogel for future clinical applications." Journal of Biomaterials Applications 33, no. 3 (2018): 447–65. http://dx.doi.org/10.1177/0885328218794163.

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Three-dimensional hydrogels are ideal for tissue engineering applications due to their structural integrity and similarity to native soft tissues; however, they can lack mechanical stability. Our objective was to develop a bioactive and mechanically stable hydrogel for clinical application. Auricular cartilage was decellularised using a combination of hypertonic and hypotonic solutions with and without enzymes to produce acellular tissue. Methacryloyl groups were crosslinked with alginate and PVA main chains via 2-aminoethylmathacrylate and the entire macromonomer further crosslinked with the

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Rosa, Elisabetta, Enrico Gallo, Teresa Sibillano, et al. "Incorporation of PEG Diacrylates (PEGDA) Generates Hybrid Fmoc-FF Hydrogel Matrices." Gels 8, no. 12 (2022): 831. http://dx.doi.org/10.3390/gels8120831.

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Generated by a hierarchical and multiscale self-assembling phenomenon, peptide-based hydrogels (HGs) are soft materials useful for a variety of applications. Short and ultra-short peptides are intriguing building blocks for hydrogel fabrication. These matrices can also be obtained by mixing low-molecular-weight peptides with other chemical entities (e.g., polymers, other peptides). The combination of two or more constituents opens the door to the development of hybrid systems with tunable mechanical properties and unexpected biofunctionalities or morphologies. For this scope, the formulation,

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Haraguchi, Kazutoshi. "Extraordinary Properties and New Functions of Nanocomposite Gels and Soft Nanocomposites with Unique Organic/Inorganic Network Structures." Advanced Materials Research 680 (April 2013): 65–69. http://dx.doi.org/10.4028/www.scientific.net/amr.680.65.

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New types of polymer hydrogels and nanocomposites, i.e., nanocomposite gels (NC gels) and soft, polymer nanocomposites (M-NCs), with novel organic/inorganic network structures have been fabricated. Both NC gels and M-NCs were synthesized by in-situ free-radical polymerization in the presence of exfoliated clay platelets in aqueous systems and were obtained in various forms and sizes with a wide range of clay contents. Here, disk-like inorganic clay nanoparticles act as multi-functional crosslinkers to form new types of network systems. NC gels have extraordinary optical, mechanical, and swelli

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15

Li, Shengnan, Hailong Yang, Nannan Zhu, et al. "Biotissue‐Inspired Anisotropic Carbon Fiber Composite Hydrogels for Logic Gates, Integrated Soft Actuators, and Sensors with Ultra‐High Sensitivity (Adv. Funct. Mater. 11/2023)." Advanced Functional Materials 33, no. 11 (2023): 2370065. http://dx.doi.org/10.1002/adfm.202370065.

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Nishizawa, Matsuhiko. "(Keynote) Soft Wet Iontronic Devices with Affinity to Biosystems." ECS Meeting Abstracts MA2024-02, no. 54 (2024): 3710. https://doi.org/10.1149/ma2024-02543710mtgabs.

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A super-aging society, frequent natural disasters, and coronavirus pandemics are accelerating the transition to a highly efficient DX society. There is also an urgent need to build a DX medical system with online integrated management of self-care (diagnosis and treatment performed by each individual) and self-medication. One of the technological cornerstones of such self-medicine lies in the innovation in "bioaffinity" of wearable and implantable devices that connect between medical systems and living body. Over the past decades, device engineering has pursued bioaffinity through the process

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17

Molchanov, V. S., M. A. Efremova, T. Yu Kiseleva, and O. E. Philippova. "Injectable ultra-soft hydrogel with natural nanoclay." Nanosystems: Physics, Chemistry, Mathematics 10, no. 1 (2019): 76–85. http://dx.doi.org/10.17586/2220-8054-2019-10-1-76-85.

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18

Guo, Meiling, Yuanpeng Wu, Shishan Xue, et al. "A highly stretchable, ultra-tough, remarkably tolerant, and robust self-healing glycerol-hydrogel for a dual-responsive soft actuator." Journal of Materials Chemistry A 7, no. 45 (2019): 25969–77. http://dx.doi.org/10.1039/c9ta10183g.

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A novel strategy to synthesize a glycerol-hydrogel with high stretchability, ultra-toughness, remarkable tolerance, and outstanding self-healing capability has been developed. A soft actuator has been fabricated based on the glycerol-hydrogel.

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19

Wang, Yueyang, Qiao Wang, Xiaosai Hu, Dan He, Juan Zhao, and Guoxing Sun. "A multi-functional zwitterionic hydrogel with unique micro-structure, high elasticity and low modulus." RSC Advances 12, no. 43 (2022): 27907–11. http://dx.doi.org/10.1039/d2ra04915e.

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In this article, the authors have developed an ultra-soft and tough dual-crosslinking zwitterionic hydrogel, which possesses a unique spike-like microstructure, low modulus, excellent stretchability and compressibility with self-healing properties.

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Hu, Xuxu, Yu Zhao, Shuai Cheng, Jinming Zhen, Zhengfeng Jia, and Ran Zhang. "Biomimetic Layered Hydrogel Coating for Enhanced Lubrication and Load-Bearing Capacity." Coatings 14, no. 9 (2024): 1229. http://dx.doi.org/10.3390/coatings14091229.

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Biomimetic hydrogel lubrication coatings with high wettability and low friction show great promise in tissue engineering, wound dressing, drug delivery, and intelligent sensing. Inspired by the hierarchical structure of natural cartilage, a layered hydrogel coating was constructed to functionalize rigid polyetheretherketone (PEEK). The layered hydrogel coating features a structural design comprising a top soft layer and a middle robust layer. The porous structure of the top soft hydrogel layer stores water molecules, providing surface lubrication, while the dense structure of the middle robust

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Liu, Zhimo, Binfan Zhao, Liucheng Zhang, et al. "Modulated integrin signaling receptors of stem cells via ultra-soft hydrogel for promoting angiogenesis." Composites Part B: Engineering 234 (April 2022): 109747. http://dx.doi.org/10.1016/j.compositesb.2022.109747.

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22

Lepo, Kelly, and Marten van Kerkwijk. "Ultra-soft Sources as Type Ia Supernovae Progenitors." Proceedings of the International Astronomical Union 7, S281 (2011): 136–39. http://dx.doi.org/10.1017/s1743921312014871.

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AbstractMissing from the usual considerations of nuclear burning white dwarfs as Type Ia supernovae progenitors are systems with very higher mass transfer rates, where more material than is needed for steady burning accretes on the white dwarf. This will expand the photosphere of the white dwarf, causing it to emit at longer wavelengths. Thus, we propose the name ultra-soft source (USS) for these objects.We present a VLT/FLAMES survey looking for USSs in the SMC, selected to be bright in the far UV and with blue far UV-V colors. While we find some unusual objects, and recover known planetary n

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23

Gori, Manuele, Sara Maria Giannitelli, Gianluca Vadalà, et al. "A Soft Zwitterionic Hydrogel as Potential Coating on a Polyimide Surface to Reduce Foreign Body Reaction to Intraneural Electrodes." Molecules 27, no. 10 (2022): 3126. http://dx.doi.org/10.3390/molecules27103126.

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Invasive intraneural electrodes can control advanced neural-interfaced prostheses in human amputees. Nevertheless, in chronic implants, the progressive formation of a fibrotic capsule can gradually isolate the electrode surface from the surrounding tissue leading to loss of functionality. This is due to a nonspecific inflammatory response called foreign-body reaction (FBR). The commonly used poly(ethylene glycol) (PEG)-based low-fouling coatings of implantable devices can be easily encapsulated and are susceptible to oxidative damage in long-term in vivo applications. Recently, sulfobetaine-ba

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24

Rosenstock, D., T. Gerber, C. Castro Müller, S. Stille, and J. Banik. "Process Stability and Application of 1900 MPa Grade Press Hardening Steel with reduced Hydrogen Susceptibility." IOP Conference Series: Materials Science and Engineering 1238, no. 1 (2022): 012013. http://dx.doi.org/10.1088/1757-899x/1238/1/012013.

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Abstract While 22MnB5 with aluminium silicon (AS) coating was established as the quasi-standard in press hardening many years ago, the need for steels that offer even higher strength is growing. These needs include corrosion protection of the automotive component and scale prevention during processing in hot forming lines. However, the processing of AS coated ultra-high strength steels involves demands for the furnace atmosphere. Reducing the hydrogen susceptibility and increasing the material strength at the same time was the driving force for the development of MBW 1900 + AS Pro. The paper f

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Yurakov, Yury A., Yaroslav A. Peshkov, Evelina P. Domashevskaya, et al. "A study of multilayer nanostructures [(Co45Fe45Zr10)35(Al2O3)65/a-Si:H]100 and [(Co45Fe45Zr10)35(Al2O3)65/a-Si]120 by means of XRD, XRR, IR spectroscopy, and USXES." European Physical Journal Applied Physics 87, no. 2 (2019): 21301. http://dx.doi.org/10.1051/epjap/2019190131.

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Interatomic interactions and superstructures of multilayer nanostructures (MLNS) consisting of ferromagnetic composite layers and silicon interlayers with or without hydrogen are studied here by means of X-ray diffraction (XRD), X-ray reflectivity (XRR), IR spectroscopy, and ultra-soft X-ray emission spectroscopy (USXES). The MLNS [(Co45Fe45Zr10)35(Al2O3)65/a-Si:H]100 and [(Co45Fe45Zr10)35(Al2O3)65/a-Si]120 were deposited on the substrate Si(100) by ion-beam sputtering of two targets, where the first target was a plate of Co45Fe45Zr10 alloy with Al2O3 inserts, and the second target was a singl

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Feng, Jiaquan. "Multi-Layered Crack-Like Flexible Strain Sensor with Gradient Concentration Structure Based on Mxene-Ta-Pva." Theoretical and Natural Science 122, no. 1 (2025): 19–25. https://doi.org/10.54254/2753-8818/2025.gl25315.

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This study presents an innovative flexible strain sensor with high sensitivity, robust mechanical properties and rapid response through the novel design of a Janus gradient concentration structure combined with laser-thermocompression synergistic processing. The sensor employs MXene as the conductive unit, with polyvinyl alcohol (PVA) and tannic acid (TA) serving as the flexible substrate and interfacial reinforcement agent, respectively, achieving high sensitivity through gradient concentration distribution. Laser etching pre-engineered periodic primary cracks in the high-concentration MXene

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27

Zhigerbayeva, Guldana, Nurxat Nuraje, Amanzhol Turlybekuly, and Salimgerey Adilov. "Pure 3D Conducting Polymer Network for an Ultra-Sensitive and Flexible Hydrogen Gas Sensor at Room Temperature." ECS Meeting Abstracts MA2024-01, no. 50 (2024): 2707. http://dx.doi.org/10.1149/ma2024-01502707mtgabs.

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Hydrogen (H2) is considered a next-generation energy source with diverse applications across valuable social, economic, and industrial sectors, including transportation, biomedical, power generation, and space exploration. Due to its low ignition energy and wide flammable range, there is an urgent global demand for ultrasensitive, lightweight, portable, wearable, and flexible hydrogen sensors to identify early gas leaks and prevent environmental and economic implications. In this study, we present a flexible hydrogen gas sensor based on conducting polymers, namely polypyrrole (PPY) with graphe

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28

Yamada, Hajime, Shiho Takahashi, Kana Yamashita, Hisashi Miyafuji, Hiroyuki Ohno, and Tatsuhiko Yamada. "High-throughput analysis of softwood lignin using tetra-n-butylphosphonium hydroxide (TBPH)." BioResources 12, no. 4 (2017): 9396–406. http://dx.doi.org/10.15376/biores.12.4.9396-9406.

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The authors developed a high-throughput method for analyzing softwood lignin using tetra-n-butylphosphonium hydroxide (TBPH). Wood meal, TBPH, and hydrogen peroxide (H2O2) were introduced into a screw-capped glass test tube and allowed to react in a pressure cooker at 121 °C for 3 h to solubilize the wood meal. The solubilized polysaccharide was precipitated by the addition of a poor solvent such as methanol. After removal of the polysaccharide, the lignin concentration was measured via ultra-violet (UV) absorption spectroscopy. The series of operations performed was summarized as the TBPH met

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Rao, C. N. R., Ved Varun Agrawal, Kanishka Biswas, et al. "Soft chemical approaches to inorganic nanostructures." Pure and Applied Chemistry 78, no. 9 (2006): 1619–50. http://dx.doi.org/10.1351/pac200678091619.

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Chemical approaches have emerged as the preferred means to synthesize nanostructures of various inorganic materials due to superior control over size, shape, and surface functionality. This article provides an overview of the contributions made in the authors' laboratory toward the synthesis of nanocrystals, nanowires, nanotubes, nanowalls, and other nanostructures of several inorganic materials. Thus, thiolized monodisperse metal nanocrystals have been obtained by a ligand exchange process and the stability of their 2D assemblies studied. Nanocrystals of pure CoO and ReO3 have been synthesize

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Lomonaco, Quentin, Karine Abadie, Jean-Michel Hartmann, et al. "Soft Surface Activated Bonding of Hydrophobic Silicon Substrates." ECS Meeting Abstracts MA2023-02, no. 33 (2023): 1601. http://dx.doi.org/10.1149/ma2023-02331601mtgabs.

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Surface Activated Bonding (SAB) is interesting for strong silicon to silicon bonding at room temperature without any annealing needed, afterwards (1). Although it is a well-known technique, the activation step, in particular, is scarcely documented. This paper offers insights about the impact of soft activation parameters on the amorphous region at the bonding interface. In addition, the adherence energy of hydrophobic silicon bonding with SAB is quantified to better understand bonding mechanisms. With very low dose and acceleration activation parameters, the surface preparation prior to bondi

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Savić Gajić, Ivana M. Savić, Ivan M. Savić, Aleksandra M. Ivanovska, Jovana D. Vunduk, Ivana S. Mihalj, and Zorica B. Svirčev. "Improvement of Alginate Extraction from Brown Seaweed (Laminaria digitata L.) and Valorization of Its Remaining Ethanolic Fraction." Marine Drugs 22, no. 6 (2024): 280. http://dx.doi.org/10.3390/md22060280.

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This study aimed to improve the conventional procedure of alginate isolation from the brown seaweed (Laminaria digitata L.) biomass and investigate the possibility of further valorization of the ethanolic fraction representing the byproduct after the degreasing and depigmentation of biomass. The acid treatment of biomass supported by ultrasound was modeled and optimized regarding the alginate yield using a response surface methodology based on the Box–Behnken design. A treatment time of 30 min, a liquid-to-solid ratio of 30 mL/g, and a treatment temperature of 47 °C were proposed as optimal co

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Wang, Zhuang, Xiaoyun Xu, Renjie Tan, Shuai Zhang, Ke Zhang, and Jinlian Hu. "Hierarchically Structured Hydrogel Composites with Ultra‐High Conductivity for Soft Electronics." Advanced Functional Materials, December 31, 2023. http://dx.doi.org/10.1002/adfm.202312667.

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AbstractConductive hydrogels possessing high conductivity, stretchability, and biocompatibility are promising materials for underwater devices and bioelectronics. However, typical hydrogels often exhibit low electrical conductivity, which is insufficient for applications requiring high electronic communication. A common approach to increase hydrogel conductivity is to introduce conductive fillers; however, this usually implies a partial sacrifice of stretchability, biocompatibility, and water content. In addition, the electrical properties of hydrogels tend to be unstable due to rehydration in

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Jaspers, Maarten, Matthew Dennison, Mathijs F. J. Mabesoone, Frederick C. MacKintosh, Alan E. Rowan, and Paul H. J. Kouwer. "Ultra-responsive soft matter from strain-stiffening hydrogels." Nature Communications 5, no. 1 (2014). http://dx.doi.org/10.1038/ncomms6808.

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Zhu, Shipei, Huanqing Cui, Yi Pan, et al. "Responsive‐Hydrogel Aquabots." Advanced Science, July 29, 2024. http://dx.doi.org/10.1002/advs.202401215.

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AbstractIt remains a challenge to produce soft robots that can mimic the responsive adaptability of living organisms. Rather than fabricating soft robots from bulk hydrogels,hydrogels are integrated into the interfacial assembly of aqueous two‐phase systems to generate ultra‐soft and elastic all‐aqueous aquabots that exhibit responsive adaptability, that can shrink on demand and have electrically conductive functions. The adaptive functions of the aquabots provide a new platform to develop minimally invasive surgical devices, targeted drug delivery systems, and flexible electronic sensors and

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Ye, Yuhang, Zhangmin Wan, P. D. S. H. Gunawardane, et al. "Ultra‐Stretchable and Environmentally Resilient Hydrogels Via Sugaring‐Out Strategy for Soft Robotics Sensing." Advanced Functional Materials, February 27, 2024. http://dx.doi.org/10.1002/adfm.202315184.

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AbstractThe adoption of hydrogels in most applications is hampered by their high free water content, which limits their mechanical performance and environmental resilience. Herein, this issue is simultaneously addressed by modulating the state of water and the intermolecular interactions in polyacrylamide (PAM) hydrogels. Specifically, PAM hydrogels are toughened by sugaring‐out using a monosaccharide (glucose, G). Glucose is found to facilitate PAM hydrogen bonding and interchain interactions. Meanwhile, the high hygroscopicity of glucose converts some of the free water to bound state, endowi

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Gonzalez-Rico, Jorge, Sara Garzon-Hernandez, Chad M. Landis, and Daniel Garcia-Gonzalez. "Magneto-mechanically derived diffusion processes in ultra-soft biological hydrogels." Journal of the Mechanics and Physics of Solids, July 2024, 105791. http://dx.doi.org/10.1016/j.jmps.2024.105791.

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Guo, Ping, Zhaoxin Zhang, Chengnan Qian, et al. "Programming Hydrogen Bonds for Reversible Elastic‐Plastic Phase Transition in a Conductive Stretchable Hydrogel Actuator with Rapid Ultra‐High‐Density Energy Conversion and Multiple Sensory Properties." Advanced Materials, September 23, 2024. http://dx.doi.org/10.1002/adma.202410324.

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AbstractSmart hydrogels have recently garnered significant attention in the fields of actuators, human‐machine interaction, and soft robotics. However, when constructing large‐scale actuated systems, they usually exhibit limited actuation forces (≈2 kPa) and actuation speeds. Drawing inspiration from hairspring energy conversion mechanism, an elasticity‐plasticity‐controllable composite hydrogel (PCTA) with robust contraction capabilities is developed. By precisely manipulating intermolecular and intramolecular hydrogen‐bonding interactions, the material's elasticity and plasticity can be prog

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Zhang, Qingtian, Hongda Lu, Guolin Yun, et al. "A Laminated Gravity‐Driven Liquid Metal‐Doped Hydrogel of Unparalleled Toughness and Conductivity." Advanced Functional Materials, October 6, 2023. http://dx.doi.org/10.1002/adfm.202308113.

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AbstractConductive hydrogels have been promising candidates for wearable and flexible electronics due to their high flexibility and biocompatibility. However, the previously reported hydrogels with conductivity over 1000 S m−1 usually have poor mechanical properties including low tensile stress (<5 MPa) and toughness (<2 MJ m−3). Here, a liquid metal‐doped polyvinyl alcohol (PVA‐LM) hydrogel is presented, which simultaneously combines ultra‐high conductivity (maximum of 217 895 S m−1) with excellent mechanical properties, including high tensile stress (15.44 MPa), large tensile strain (7

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Zhang, Jianhua, Jiahe Liao, Zemin Liu, Rongjing Zhang, and Metin Sitti. "Liquid Metal Microdroplet‐Initiated Ultra‐Fast Polymerization of a Stimuli‐Responsive Hydrogel Composite." Advanced Functional Materials, November 12, 2023. http://dx.doi.org/10.1002/adfm.202308238.

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AbstractRecent advances in composite hydrogels achieve material enhancement or specialized stimuli‐responsive functionalities by pairing with a functional filler. Liquid metals (LM) offer a unique combination of chemical, electrical, and mechanical properties that show great potential in hydrogel composites. Polymerization of hydrogels with LM microdroplets as initiators is a particularly interesting phenomenon that remains in its early stage of development. In this work, an LM‐hydrogel composite is introduced, in which LM microdroplets dispersed inside the hydrogel matrix have dual functions

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Li, Zhikang, Bin Wang, Jijian Lu, et al. "Highly Stretchable, Self‐Healable, and Conductive Gelatin Methacryloyl Hydrogel for Long‐Lasting Wearable Tactile Sensors." Advanced Science, May 29, 2025. https://doi.org/10.1002/advs.202502678.

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AbstractConstructing hydrogels with both remarkable mechanical and self‐healing properties is highly desirable for soft electronics, yet remains challenging due to conflicting demands on chemical bonds and polymer chain mobility. Herein, a highly stretchable, self‐healing, and conductive gelatin methacryloyl (GelMA) hydrogel is developed by incorporating polyvinyl alcohol, N‐(2‐amino‐2‐oxoethyl)‐2‐propenamide, sodium tetraborate, and sodium chloride into GelMA, followed by a two‐step polymerization process. The introduced novel interpenetrating networks, hierarchical hydrogen bonds (weak and s

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Zhang, Jipeng, Yang Hu, Lina Zhang, Jinping Zhou, and Ang Lu. "Transparent, Ultra-Stretching, Tough, Adhesive Carboxyethyl Chitin/Polyacrylamide Hydrogel Toward High-Performance Soft Electronics." Nano-Micro Letters 15, no. 1 (2022). http://dx.doi.org/10.1007/s40820-022-00980-9.

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AbstractTo date, hydrogels have gained increasing attentions as a flexible conductive material in fabricating soft electronics. However, it remains a big challenge to integrate multiple functions into one gel that can be used widely under various conditions. Herein, a kind of multifunctional hydrogel with a combination of desirable characteristics, including remarkable transparency, high conductivity, ultra-stretchability, toughness, good fatigue resistance, and strong adhesive ability is presented, which was facilely fabricated through multiple noncovalent crosslinking strategy. The resultant

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Ding, Baofu, Pengyuan Zeng, Ziyang Huang, et al. "A 2D material–based transparent hydrogel with engineerable interference colours." Nature Communications 13, no. 1 (2022). http://dx.doi.org/10.1038/s41467-021-26587-z.

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AbstractTransparent hydrogels are key materials for many applications, such as contact lens, imperceptible soft robotics and invisible wearable devices. Introducing large and engineerable optical anisotropy offers great prospect for endowing them with extra birefringence-based functions and exploiting their applications in see-through flexible polarization optics. However, existing transparent hydrogels suffer from limitation of low and/or non-fine engineerable birefringence. Here, we invent a transparent magneto-birefringence hydrogel with large and finely engineerable optical anisotropy. The

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Tian, Han, Yanyu Hu, Jiajie Wu, et al. "Crystal Transduction 3D Printing of Bio‐Hydrogels with High Fidelity and Order Micro Pores." Advanced Functional Materials, November 6, 2024. http://dx.doi.org/10.1002/adfm.202415799.

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Abstract3D printing of bio‐hydrogel scaffolds are widely used in tissue regeneration. However, due to the ultra‐soft properties of bio‐hydrogels, it is hard to print them precisely. Here, crystal transduction 3D printing with high fidelity is proposed to address this challenge. A phase‐transition bio‐inks system with beeswax is developed for crystal transduction, which can accelerate energy consumption and induce soft bio‐inks to quickly harden during printing. Interestingly, an interconnected porous hydrogel scaffold can be obtained after washing the crystal beeswax. The porous hydrogel scaff

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Zhang, Ran, Fangdong Ning, Xuxu Hu, Jinming Zhen, Bo Ge, and Zhengfeng Jia. "Bionic layered hydrogel with high strength for excellent lubrication and load capacity." Journal of Applied Polymer Science, June 6, 2024. http://dx.doi.org/10.1002/app.55845.

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AbstractTraditional hydrogels with soft and wet features often show poor mechanical properties due to their single cross‐linked network and amorphous structure. Hence, there are still great challenges in the preparation of strong and elastic hydrogels with superior lubrication performance for broader applications. Inspired by the biphasic structure of natural cartilage, the tough layered P(AM‐AA)‐Fe3+ (poly(acrylamide‐co‐acrylic acid)‐Fe3+) hydrogels are prepared via a sodium citrate treatment‐induced surface dissociation approach. The top lubricating layer with porous structure and high water

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Chong, Jooyeun, Changhoon Sung, Kum Seok Nam, et al. "Highly conductive tissue-like hydrogel interface through template-directed assembly." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-37948-1.

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AbstractOver the past decade, conductive hydrogels have received great attention as tissue-interfacing electrodes due to their soft and tissue-like mechanical properties. However, a trade-off between robust tissue-like mechanical properties and good electrical properties has prevented the fabrication of a tough, highly conductive hydrogel and limited its use in bioelectronics. Here, we report a synthetic method for the realization of highly conductive and mechanically tough hydrogels with tissue-like modulus. We employed a template-directed assembly method, enabling the arrangement of a disord

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Pitenis, Angela A., Juan Manuel Urueña, Ryan M. Nixon, et al. "Lubricity from Entangled Polymer Networks on Hydrogels." Journal of Tribology 138, no. 4 (2016). http://dx.doi.org/10.1115/1.4032889.

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Structural hydrogel materials are being considered and investigated for a wide variety of biotribological applications. Unfortunately, most of the mechanical strength and rigidity of these materials comes from high polymer concentrations and correspondingly low polymer mesh size, which results in high friction coefficients in aqueous environments. Recent measurements have revealed that soft, flexible, and large mesh size hydrogels can provide ultra low friction, but this comes at the expense of mechanical strength. In this paper, we have prepared a low friction structural hydrogel sample of po

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Cafiso, Diana, Federico Bernabei, Matteo Lo Preti, et al. "DLP‐Printable Porous Cryogels for 3D Soft Tactile Sensing." Advanced Materials Technologies, February 14, 2024. http://dx.doi.org/10.1002/admt.202302041.

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AbstractThree‐Dimensional (3D) printed porous materials hold the potential for various soft sensing applications due to their remarkable flexibility, low density, and customizable geometries. However, developing versatile and efficient fabrication methods is crucial to unlock their full potential. A novel approach is introduced by combining Digital Light Processing (DLP) 3D printing and freeze‐drying to manufacture deformable cryogels featuring intricate morphologies. Photocurable hydrogels based on Poly(3,4‐ethylenedioxythiophene)Polystyrene sulfonate (PEDOT:PSS), Polyethylene glycol Diacryla

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Yang, Kai, Bolong Li, Zhihao Ma, et al. "Ion‐Selective Mobility Differential Amplifier: Enhancing Pressure‐Induced Voltage Response in Hydrogels." Angewandte Chemie, November 15, 2024. http://dx.doi.org/10.1002/ange.202415000.

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Piezoionics is an emerging mechanical‐electrical energy conversion paradigm that enables self‐powered sensing systems for next‐generation intelligent wearable electronics. However, there are currently no rational design approaches to enhance the stimulus response of piezoionic devices. Here, we present a strategy using crown ether as ion‐selective mobility differential amplifiers for enhancing the pressured‐induced voltage response in ionic polyvinyl alcohol (PVA) hydrogels. The crown ether grafted PVA (PVA‐CE) hydrogel prototype achieves a 30‐fold amplified piezoionic coefficient of 1490 nV P

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Yang, Kai, Bolong Li, Zhihao Ma, et al. "Ion‐Selective Mobility Differential Amplifier: Enhancing Pressure‐Induced Voltage Response in Hydrogels." Angewandte Chemie International Edition, November 15, 2024. http://dx.doi.org/10.1002/anie.202415000.

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Piezoionics is an emerging mechanical‐electrical energy conversion paradigm that enables self‐powered sensing systems for next‐generation intelligent wearable electronics. However, there are currently no rational design approaches to enhance the stimulus response of piezoionic devices. Here, we present a strategy using crown ether as ion‐selective mobility differential amplifiers for enhancing the pressured‐induced voltage response in ionic polyvinyl alcohol (PVA) hydrogels. The crown ether grafted PVA (PVA‐CE) hydrogel prototype achieves a 30‐fold amplified piezoionic coefficient of 1490 nV P

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Chu, Zhaoyang, Kaining He, Siqi Huang, Wenhua Zhang, Xueyu Li, and Kunpeng Cui. "Investigating Temperature‐Dependent Microscopic Deformation in Tough and Self‐healing Hydrogel Using Time‐Resolved USAXS." Macromolecular Rapid Communications, June 4, 2024. http://dx.doi.org/10.1002/marc.202400327.

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AbstractTough and self‐healing hydrogels are typically sensitive to loading rates or temperatures due to the dynamic nature of non‐covalent bonds. Understanding the structure evolution under varying loading conditions can provide valuable insights for developing new tough soft materials. In this study, polyampholyte hydrogel with a hierarchical structure is used as a model system. The evolution of the microscopic structure during loading is investigated under varied loading temperatures. By combining ultra‐small angle X‐ray scattering and Mooney–Rivlin analysis, it is elucidated that the defor

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