Ultra‐Tough and Recyclable Ionogels Constructed by Coordinated Supramolecular Solvents

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(50)

Published: Oct. 20, 2022

The mechanical properties of most hydrogels (ionogels) are considerably affected by covalently cross-linked networks. However, the interactions between solvent/solvent molecules and solvent/polymer chains usually ignored. Herein, a series ultra-tough ionogels were prepared via supramolecular solvent, halometallate ionic liquid, in which cations coordinating anions form 3D network. linear polymer physically with solvents synergistically enhancing strength (14.3 MPa), toughness (78 MJ m-3 ), Young's modulus (55 MPa) ionogels, effectively dispersing stress concentration under load, obtaining better fatigue resistance higher fracture energy (198 kJ m-2 ). Furthermore, reversible cross-linking enables green recovery recycling simply water. This strategy shows broad applicability based on variety coordinatable polymers.

Language: Английский

---

Self‐Adhesive Self‐Healing Thermochromic Ionogels for Smart Windows with Excellent Environmental and Mechanical Stability, Solar Modulation, and Antifogging Capabilities

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(20)

Published: Feb. 27, 2023

Current thermochromic materials used in smart windows still face challenges, such as poor mechanical and environmental stability, unsatisfactory solar modulation capacity, low transparency. Herein, the first self-adhesive self-healing ionogels with excellent antifogging capability, transparency, capability by loading binary ionic liquids (ILs) into rational-designed poly(urethaneurea) acylsemicarbazide (ASCZ) moieties that have reversible multiple hydrogen bonds are reported their feasibility reliability long service life is demonstrated. The can switch between transparent opaque without leakage or shrinkage, constrained phase separation of ILs within ionogels. highest transparency among be well maintained after undergoing 1000 transitions, stretches, bends, storage at -30 °C, 60 90% RH, vacuum environment for 2 months. formation high-density ASCZ contributes to strength allows spontaneously heal damages fully recycled room temperature loss capabilities.

Language: Английский

---

Water‐Resistant Conductive Gels toward Underwater Wearable Sensing

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(42)

Published: March 1, 2023

Abstract Conductive gels are developing vigorously as superior wearable sensing materials due to their intrinsic conductivity, softness, stretchability, and biocompatibility, showing a great potential in many aspects of lives. However, compared wide application on land, it is significant yet rather challenging for traditional conductive realize under water. The swelling the loss components aqueous environment, resulted from diffusion across interface, lead structural instability performance decline. Fortunately, efforts devoted improving water resistance employing them field underwater recent years, some exciting achievements obtained, which significance promoting safety efficiency activities. there no review thoroughly summarize gels. This presents brief overview representative design strategies water‐resistant diversified applications sensors. Finally, ongoing challenges further also discussed along with recommendations future.

Language: Английский

---

Deep Eutectic Solvents‐Based Ionogels with Ultrafast Gelation and High Adhesion in Harsh Environments

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(9)

Published: Feb. 1, 2023

Adhesive materials have recently drawn intensive attention due to their excellent sealing ability, thereby stimulating advances in science and industrial usage. However, reported adhesives usually exhibit weak adhesion strength, require high pressure for strong bonding, display severe deterioration various harsh environments. In this work, instead of water or organic solvents, a deep eutectic solution (DES) was used as the medium photopolymerization zwitterionic polarized monomers, thus generating novel ionogel with tunable mechanical properties. Multiple hydrogen bonds electrostatic interactions between DES monomers facilitated ultrafast gelation instant bonding without any external pressure, which rarely previously. Furthermore, different environments (e.g., water, acidic basic buffers, saline solutions) onto hydrophilic glass tissues) hydrophobic polymethyl methacrylate, polystyrene, polypropylene) adherends demonstrated. Also, stretchability at extreme temperatures (-80 80 °C) indicated its widespread applications. biocompatible showed burst stomach intestine tissues prevent liquid leakage, highlighting potential an adhesive patch. This provides unprecedented opportunities fields packaging industry, marine engineering, medical adhesives, electronic assembly.

Language: Английский

---

Stretchable on-skin touchless screen sensor enabled by ionic hydrogel

Nano Research, Journal Year: 2023, Volume and Issue: 17(5), P. 4462 - 4470

Published: Dec. 29, 2023

Language: Английский

---