Sea Cucumber‐Inspired Polyurethane Demonstrating Record‐Breaking Mechanical Properties in Room‐Temperature Self‐Healing Ionogels

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

Published: Sept. 12, 2024

Abstract Practical applications of existing self‐healing ionogels are often hindered by the trade‐off between their mechanical robustness, ionic conductivity, and temperature requirements for ability. Herein, this challenge is addressed drawing inspiration from sea cucumber. A polyurethane containing multiple hydrogen‐bond donors acceptors synthesized used to fabricate room‐temperature with excellent properties, high puncture resistance, impact resistance. The hard segments polyurethane, driven hydrogen bonds, coalesce into phase regions, which can efficiently dissipate energy through reversible disruption reformation bonds. Consequently, resulting exhibit record‐high tensile strength toughness compared other ionogels. Furthermore, inherent reversibility bonds within regions allows spontaneously self‐heal damaged properties conductivity times at room temperature. To underscore application potential, these employed as electrolytes in fabrication electrochromic devices, stable performance, repeatable healing ability, satisfactory This study presents a novel strategy exceptional capability.

Language: Английский

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Fast-Developing Dynamic Radiative Thermal Management: Full-Scale Fundamentals, Switching Methods, Applications, and Challenges

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 17, 2025

Abstract Rapid population growth in recent decades has intensified both the global energy crisis and challenges posed by climate change, including warming. Currently, increased frequency of extreme weather events large fluctuations ambient temperature disrupt thermal comfort negatively impact health, driving a growing dependence on cooling heating sources. Consequently, efficient management become central focus research. Traditional systems consume substantial energy, further contributing to greenhouse gas emissions. In contrast, emergent radiant technologies that rely renewable have been proposed as sustainable alternatives. However, achieving year-round without additional input remains formidable challenge. Recently, dynamic radiative emerged most promising solution, offering potential for energy-efficient adaptation across seasonal variations. This review systematically presents advancements management, covering fundamental principles, switching mechanisms, primary materials, application areas. Additionally, key hindering broader adoption are discussed. By highlighting their transformative potential, this provides insights into design industrial scalability these innovations, with ultimate aim promoting integration applications.

Language: Английский

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Jellyfish‐inspired Polyurea Ionogel with Mechanical Robustness, Self‐Healing, and Fluorescence Enabled by Hyperbranched Cluster Aggregates

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

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Photochromic ionogel with a wide temperature range and fatigue resistance for high-resolution rewritable information record

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153263 - 153263

Published: June 18, 2024

Language: Английский

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Ionic Gel Electrolytes for Electrochromic Devices

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(37), P. 48927 - 48936

Published: Sept. 6, 2024

Ionic gels are emerging as a promising solution for improving the functionality of electrochromic devices. They increasingly drawing attention in fields electrochemistry and functional materials due to their potential address issues associated with traditional liquid electrolytes, such volatility, toxicity, leakage. In extreme scenarios and/or design flexible devices, ionic gel electrolytes offer unique invaluable advantages. This perspective delves into application exploring various methods enhance performance. After briefly introducing developments trends key points future development discussed detail.

Language: Английский

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Inspired by adipose tissue, mechanically robust and reprocessable LM-based composites for ultra-sensitive flexible pressure sensors

Composites Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 111061 - 111061

Published: Jan. 1, 2025

Language: Английский

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Supramolecular 3D Printing Enabling One‐Step Generation of Healable and Recyclable Structurally Colored Objects

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

Published: July 11, 2024

Abstract Structurally colored objects with 3D geometries are intriguing in optical devices and visual sensors, but their preparation is bottlenecked by complicated procedures limited material choices. Herein, a facile supramolecular printing strategy proposed via direct ink writing (DIW) colloidal inks (SCIs) consisting of polymers colloids based on interactions to construct healable recyclable structurally objects. Optimized balance the rheological requirements for DIW high particle volume fraction one‐step immediate generation structural color. The shear‐thinning thixotropy features SCIs, characterized two‐order‐of‐magnitude decrease viscosity during process 50% storage modulus recovery thereafter, ensure reversible solid–liquid transition extrusion deposition process. short‐range ordered arrangements within matrix give rise angle‐independent Moreover, from SCIs and, more importantly, can be closed‐looped recycled thanks reversibility interactions. Leveraging optimized interactions, various wide range choices meeting extended directly. This study paves way constructing advanced materials strategy.

Language: Английский

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Highly tough, crack‐resistant and self‐healable piezo‐ionic skin enabled by dynamic hard domains with mechanosensitive ionic channel

Smart Molecules, Journal Year: 2024, Volume and Issue: 2(3)

Published: Aug. 19, 2024

Abstract Robust and reliable piezo‐ionic materials that are both crack resistant self‐healable like biological skin hold great promise for applications inflexible electronics intelligent systems with prolonged service lives. However, such a combination of high toughness, superior resistance, autonomous self‐healing effective control ion dynamics is rarely seen in artificial iontronic because these features seemingly incompatible design. Here, we resolve this perennial mismatch through molecularly engineered strategy implanting carboxyl‐functionalized groups into the dynamic hard domain structure synthesized poly(urethane‐urea). This design provides an ultra‐high fracture energy 211.27 kJ m −2 over 123.54 times tough human skin, while maintaining skin‐like stretchability, elasticity, 96.40% healing efficiency. Moreover, carboxyl anion group allows confinement ionic fluids though electrostatic interaction, thereby ensuring remarkable pressure sensitivity 7.03 kPa −1 tactile sensors. As such, successfully demonstrated enormous potential ability sensor biomedical monitoring robotic item identification, which indicates promising future uses flexible human–machine interactions.

Language: Английский

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Thermochromic Hydrogel-based Energy Efficient Smart Windows: Fabrication, Mechanisms, and Advancements

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

Published: Jan. 1, 2024

This review provides a comprehensive summary of recent advancements in hydrogel-based thermochromic smart windows, focusing on fabrication, chromic mechanisms, and improvements responsiveness, stability, energy-saving performance.

Language: Английский

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Ligand Dissociation of Metal-Complex Photocatalysts toward pH-Photomanipulation in Dynamic Covalent Hydrogels for Printing Reprocessable and Recyclable Devices

ACS Macro Letters, Journal Year: 2024, Volume and Issue: 13(6), P. 664 - 672

Published: May 16, 2024

Dynamic covalent hydrogels are gaining attention for their potential in smart materials, soft devices, electronics, and more thanks to impressive mechanical properties, biomimetic structures, dynamic behavior. However, a significant challenge lies designing precise efficient photochemistry preparation, allowing complex structures control over the process. Herein, we propose general straightforward orthogonal strategy preparing high-performance printable hydrogels, thereby broadening advanced applications. This photochemical uses bifunctional photocatalyst initiate radical polymerization release ligands through rapid light-mediated dissociation mechanism. process leads controlled increase system pH from mildly acidic alkaline conditions within one hundred seconds, which turn triggers pH-sensitive model reactions of boronic acid/diol complexation Knoevenagel condensation. The enables formation interpenetrated conjoined networks, significantly enhancing properties hydrogels. reversible bonds formed during process, i.e., ester unsaturated ketone bonds, confer excellent self-healing, reprocessable, recyclable on variations. Furthermore, this rapid, fabrication behavior highly compatible with printing techniques, enabling design adaptive sensors different structures. These advancements promising various material science, medicine, engineering

Language: Английский

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