Hydrophilic–Hydrophobic Network Hydrogels Achieving Optimal Strength and Hysteresis Balance DOI
Bin Zhang, Jianhui Qiu,

Xuefen Meng

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(42), P. 57769 - 57777

Published: Oct. 9, 2024

The biocompatibility and adaptability of hydrogels make them ideal candidates for use as artificial tendons muscles in clinical applications, where both muscle-like strength low hysteresis are essential. However, achieving a balance between high remains significant challenge. Herein, we demonstrated self-assembly process heterogeneous to meet the dilemma. And composed hydrophilic hydrophobic polymers. network absorbs water, causing phase separation into water-rich water-poor phase, while polymers entanglement arrest separation. Our results that these achieve remarkable mechanical properties, with 848.8 kPa, energy loss 19.6 kJ/m3, minimal (0.046) during loading–unloading cycles. reinforcing mechanisms underlying properties attributed crystallization, molecular entanglement, chain rearrangement induced by stretching. Furthermore, combination networks is exceedingly rare reported hydrogels.

Language: Английский

Fully Polymeric Conductive Hydrogels with Low Hysteresis and High Toughness as Multi‐Responsive and Self‐Powered Wearable Sensors DOI
Weiyi Wang,

Pengshan Guo,

Xin Liu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: April 22, 2024

Abstract High mechanical strength, excellent toughness, low hysteresis, and robust resilience are of great importance for stretchable conductive hydrogels (CHs) to heighten their reliabilities self‐powered sensing applications. However, it still remains challenging simultaneously obtain the mutually exclusive performances. Herein, an intrinsically adhesive hydrogel is fabricated by one‐step radical polymerization acrylamide (AAm), three hydroxy groups together clustered‐N‐[tris(hydroxymethyl)methyl]acrylamide (THMA), cationic 1‐Butyl‐3‐Vinylimidazolium Bromide (ILs) dissolved in core‐shell structurally dispersed PEDOT:PSS (PP) solution. Owing abundant clustered hydrogen bonds, electrostatic interactions between PILs chains anionic PSS shells, polymer chain entanglements, CHs feature superior properties with a high tensile strength (0.25 MPa), fracture strain (1015%), toughness (1.22 MJ m ‐3 ), energy 36.5 kJ ‐2 extremely hysteresis (5%), display fatigue resistance. As result, indicate gauge factor up 10.46, broad range (1‐900%) pressure (0.05‐100 kPa), fast responsive rate, thus qualifying monitoring reliably accurately large tiny human movements daily life. Moreover, hydrogel‐assembled triboelectric nanogenerators (TENGs) exhibit stable electrical output performances, which greatly promising flexible wearable electronics.

Language: Английский

Citations

39
Neural Network‐Inspired Polyurea Ionogel with Mechanical Robustness, Low Hysteresis, and High Transparency for Soft Iontronics DOI
Zhipeng Zhang, Qian Lu,

Jianfeng Cheng

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: March 7, 2024

Abstract Concurrently achieving mechanical robustness, low hysteresis, and high transparency are essential for ionogels to enhance their reliability satisfy the requirements in soft electronics. Fabricating comprising these characteristics presents a considerable challenge. Herein, inspired by structure of neural networks, new strategy situ formation dense urea moieties aggregated domains is proposed achieve topology‐tailoring polyurea ionogels. Initially, leveraging pronounced disparity reactivity isocyanate (─NCO) groups between isophorone diisocyanate (IPDI) NCO‐terminated prepolymer (PPGTD), IPDI preferentially reacts with deblocked trifunctional latent curing agents, resulting domains. Thereafter, interconnected via PPGTD establish polymer networks which ionic liquid uniformly dispersed, forming like Attributed this unique design strategy, ionogel demonstrates remarkable properties, including strength (0.6–2.4 MPa), excellent toughness (0.9–4.3 MJ m −3 ), hysteresis (6.6–11.6%), (>92%), along enhanced fatigue puncture resistance. Furthermore, exhibit outstanding versatility, enabling strain sensors, flexible electroluminescence devices, nanogenerators. This contributes unparalleled combinatory catering diverse demands iontronics.

Language: Английский

Citations

25
Low‐Hysteresis and Tough Ionogels via Low‐Energy‐Dissipating Cross‐Linking DOI
Bin Sun, Kai Liu, Baohu Wu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(44)

Published: Aug. 29, 2024

Low-hysteresis merits can help polymeric gel materials survive from consecutive loading cycles and promote life span in many burgeoning areas. However, it is a big challenge to design low-hysteresis tough materials, especially for ionogels. This be attributed the fact that higher viscosities of ionic liquids (ILs) would increase chain friction gels eventually dissipate large amounts energy under deformation. Herein, chemical ionogels proposed achieve characteristics both mechanical electric aspects via hierarchical aggregates formed by supramolecular self-assembly quadruple H-bonds soft IL-rich matrix. These self-assembled nanoaggregates not only greatly reinforce matrix enhance resilience, but also exhibit low-energy-dissipating features stress conditions, simultaneously benefiting properties. toughness subsequent anti-fatigue properties response external cyclic stimuli. More importantly, these are presented as model system elucidate underlying mechanism low hysteresis fatigue resistance. Based on findings, further demonstrated strategy universal.

Language: Английский

Citations

15
Recent progress in fabrications, properties and applications of multifunctional conductive hydrogels DOI
Jie Liu, Wenbin Wang, Hui Li

et al.

European Polymer Journal, Journal Year: 2024, Volume and Issue: 208, P. 112895 - 112895

Published: March 1, 2024

Language: Английский

Citations

14
Jellyfish‐inspired Polyurea Ionogel with Mechanical Robustness, Self‐Healing, and Fluorescence Enabled by Hyperbranched Cluster Aggregates DOI
Zhipeng Zhang, Qian Lu, Bin Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 23, 2024

Ionogels are promising for soft iontronics, with their network structure playing a pivotal role in determining performance and potential applications. However, simultaneously achieving mechanical toughness, low hysteresis, self-healing, fluorescence using existing structures is challenging. Drawing inspiration from jellyfish, we propose novel hierarchical crosslinking design situ formation of hyperbranched cluster aggregates (HCA) to fabricate polyurea ionogels overcome these challenges. Leveraging the disparate reactivity isocyanate groups, induce HCA through competing reactions, enhancing toughness imparting clustering-triggered emission ionogel. This synergy between supramolecular interactions plasticizing effect ionic liquid leads reduced hysteresis Furthermore, incorporation NCO-terminated prepolymer dynamic oxime-urethane bonds (NPU) enables self-healing enhances stretchability. Our investigations highlight significant influence on ionogel performance, showcasing robustness including high strength (3.5 MPa), exceptional (5.5 MJ m

Language: Английский

Citations

9
Mechanical Regulation of Polymer Gels DOI
Chenggong Xu,

Yi Chen,

Siyang Zhao

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(18), P. 10435 - 10508

Published: Sept. 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.

Language: Английский

Citations

9
Atmospheric moisture-digesting zwitterionic skin for non-drying and self-adhesive multifunctional electronics DOI
Jiqiang Wang,

Yanhao Bi,

Junxuan Liang

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 124, P. 109500 - 109500

Published: March 14, 2024

Language: Английский

Citations

7
Recent development on the design, preparation, and application of stretchable conductors for flexible energy harvest and storage devices DOI Creative Commons

Minhan Cheng,

Ke Tian, Qin Tian

et al.

SusMat, Journal Year: 2024, Volume and Issue: 4(4)

Published: May 30, 2024

Abstract The intensifying energy crisis has made it urgent to develop robust and reliable next‐generation systems. Except for conventional large‐scale sources, the imperceptible randomly distributed embedded in daily life awaits comprehensive exploration utilization. Harnessing latent potential facilitate further evolution of soft Compared with rigid devices, flexible devices are more convenient suitable harvesting storing from dynamic complex structures such as human skin. Stretchable conductors that capable withstanding strain (≫1%) while sustaining stable conductive pathways prerequisites realizing electronic devices. Therefore, understanding characteristics these evaluating feasibility their fabrication strategies particularly critical. In this review, various preparation methods stretchable carefully classified analyzed. Furthermore, recent progress application storage based on is discussed detail. Finally, challenges promising opportunities development integrated highlighted, seeking inspire future research directions.

Language: Английский

Citations

7
Flexible Artificial Tactility with Excellent Robustness and Temperature Tolerance Based on Organohydrogel Sensor Array for Robot Motion Detection and Object Shape Recognition DOI
Guoqi Chen,

Yunting Zhang,

Shengnan Li

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Abstract Hydrogel‐based flexible artificial tactility is equipped to intelligent robots mimic human mechanosensory perception. However, it remains a great challenge for hydrogel sensors maintain flexibility and sensory performances during cyclic loadings at high or low temperatures due water loss freezing. Here, robot developed with robustness based on organohydrogel sensor arrays negligent hysteresis temperature tolerance. Conductive polyaniline chains are interpenetrated through poly(acrylamide‐ co ‐acrylic acid) network glycerin/water mixture interchain electrostatic interactions hydrogen bonds, yielding dissipated energy of 1.58 MJ m −3 , ultralow 1000 loadings. Moreover, the binary solvent provides gels outstanding tolerance from −100 60 °C remain flexible, fatigue resistant, conductive (0.27 S −1 ), highly strain sensitive (GF 3.88) pressure (35.8 MPa ). The manipulator finger dorsa pads simultaneously monitor motions detect distribution exerted by grasped objects. A machine learning model used train system recognize shape objects 100% accuracy. organohydrogels promising novel robots.

Language: Английский

Citations

7
Robust Fiber Strain Sensor by Designing Coaxial Coiling Structure with Mutual Inductance Effect DOI

Yulu Ai,

Zhen Wang, Yue Liu

et al.

Advanced Fiber Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 5, 2024

Language: Английский

Citations

5