Strong and Ultratough Ionogel Enabled by Ingenious Combined Ionic Liquids Induced Microphase Separation

Advanced Functional Materials, Год журнала: 2023, Номер 33(52)

Опубликована: Сен. 12, 2023

Abstract Ionogels have become a popular material in flexible electronics and soft robotics based on their excellent ionic conductivity, environmental tolerance, electrochemical stability. However, it remains challenge to develop an ionogel integrated with high strength, toughness, self‐healing, adhesion. Herein, novel strategy is established design high‐strength (0.97 MPa) tensile (980%), crack insensitivity, self‐healing the cosolvent method. By virtue of differential interactions between specific polymer various liquids gradient polarity, systems are employed achieve high‐performance ionogels by simple one‐step polymerization. Gel permeation chromatography, atomic force microscopy, time‐domain nuclear magnetism, density functional theoretical calculation used analyze reasons. Microphase separation can be induced hydrone or stretching enhance strength ionogel. Therefore, assembled as strain temperature sensors monitor human movement person's body low detection threshold (0.1 °C) extreme environments. This concept creates new path materials performance, provide prospective regulate situ microphase change performance resulting via

Язык: Английский

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Amphibious Polymer Materials with High Strength and Superb Toughness in Various Aquatic and Atmospheric Environments

Advanced Materials, Год журнала: 2023, Номер 36(2)

Опубликована: Сен. 8, 2023

Herein, the fabrication of amphibious polymer materials with outstanding mechanical performances, both underwater and in air is reported. A polyvinyl alcohol/poly(2-methoxyethylacrylate) (PVA/PMEA) composite multiscale nanostructures prepared by combining solvent exchange thermal annealing strategies, which contributes to nanophase separation rigid PVA-rich soft PMEA-rich phases high-density crystalline domains PVA chains, respectively. Benefiting from nanostructure, PVA/PMEA hydrogel demonstrates excellent stability harsh (such as acidic, alkaline, saline) aqueous solutions, well superior behavior a breaking strength up 34.8 MPa toughness 214.2 MJ m

Язык: Английский

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Healable Ionic Conductors with Extremely Low‐Hysteresis and High Mechanical Strength Enabled by Hydrophobic Domain‐Locked Reversible Interactions

Advanced Materials, Год журнала: 2023, Номер 35(51)

Опубликована: Окт. 11, 2023

Extremely low hysteresis, high mechanical strength, superior toughness, and excellent healability are essential for stretchable ionic conductors to enhance their reliability meet cutting-edge applications. However, the fabrication of with such mutually exclusive properties remains challenging. Herein, extremely low-hysteresis healable a tensile strength ≈8.9 MPa toughness ≈23.2 MJ m-3 fabricated through complexation 4-carboxybenzaldehyde (CBA) grafted poly(vinyl alcohol) (PVA) (denoted as PVA-CBA) poly (allylamine hydrochloride) (PAH) followed by acidification ion-loading steps. The step generates PVA-CBA/PAH in situ formed dynamic hydrophobic domains that lock stabilize noncovalent interactions. This significantly minimizes energy dissipation during cyclic loading (≤200% strain), resulting hysteresis (≈5%). fractured can be healed at 60 °C restore original properties. Because show highly stable reproducible electrical response over 5000 uninterrupted loading-unloading cycles strain 200%. conductor based sensors exhibit sensitivity wide range strains (1-500%).

Язык: Английский

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Ion Clusters‐Driven Strong and Acid/Alkali/ Freezing‐Tolerant Conductive Hydrogels for Flexible Sensors in Extreme Environments

Advanced Functional Materials, Год журнала: 2023, Номер 33(50)

Опубликована: Сен. 8, 2023

Abstract Supramolecular polymer hydrogels, exhibiting wide applications in flexible sensing, wearable electronics, artificial skin, etc., often require complex molecule and component design to adapt extreme environments. Most supramolecular hydrogels currently, however, are unable satisfy the harsh demands ascribed their poor mechanical properties chemical stability. Herein, this study demonstrates a novel strategy fabricate superstrong polyvinyl alcohol (PVA) with densely networks (SPNs) complexation, induced by simple deprotonation reconfiguration of ion clusters (ICs). Such enables PVA high strength (9.64 ± 0.5 MPa), compressibility, recoverability (load objects over ≈10000 times more than its weight), resistance various solvents, freezing tolerance (keep conductive even at −50 °C) many other performances. Notably, resultant surpass majority reported, tackling long‐standing dilemma both stability for hydrogels. A proof‐of‐concept spider robot is assembled 3D printed model, which achieves successfully signal acquisition different conditions. In multifunctional envisioned as universal sensors conditions, significant exploration environments that not easily accessible humans, such North South Poles solvent leakage area.

Язык: Английский

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A renewable hydrogel electrolyte membrane prepared by carboxylated chitosan and polyacrylamide for solid-state supercapacitors with wide working temperature range

Journal of Power Sources, Год журнала: 2023, Номер 560, С. 232704 - 232704

Опубликована: Янв. 24, 2023

Язык: Английский

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Bimetallic (AuAg, AuPd and AgPd) nanoparticles supported on cellulose-based hydrogel for reusable catalysis

Carbohydrate Polymers, Год журнала: 2023, Номер 310, С. 120726 - 120726

Опубликована: Фев. 24, 2023

Язык: Английский

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Multifunctional polylactic acid biocomposite film for active food packaging with UV resistance, antioxidant and antibacterial properties

International Journal of Biological Macromolecules, Год журнала: 2023, Номер 253, С. 126494 - 126494

Опубликована: Авг. 23, 2023

Язык: Английский

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Ultra-tough and stress-free two-way shape memory polyurethane induced by polymer segment “spring”

Chemical Engineering Journal, Год журнала: 2023, Номер 470, С. 144212 - 144212

Опубликована: Июнь 17, 2023

Язык: Английский

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Photocuring 3D Printing of Hydrogels: Techniques, Materials, and Applications in Tissue Engineering and Flexible Devices

Macromolecular Rapid Communications, Год журнала: 2024, Номер 45(7)

Опубликована: Янв. 25, 2024

Photocuring 3D printing of hydrogels, with sophisticated, delicate structures and biocompatibility, attracts significant attention by researchers possesses promising application in the fields tissue engineering flexible devices. After years development, photocuring technologies hydrogel inks make great progress. Herein, techniques including direct ink writing (DIW), stereolithography (SLA), digital light processing (DLP), continuous liquid interface production (CLIP), volumetric additive manufacturing (VAM), two photon polymerization (TPP) are reviewed. Further, raw materials for (photocurable polymers, monomers, photoinitiators, additives) applications devices also At last, current challenges future perspectives hydrogels discussed.

Язык: Английский

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Mechanically Robust Hemostatic Hydrogel Membranes with Programmable Strain-Adaptive Microdomain Entanglement for Wound Treatment in Dynamic Tissues

ACS Nano, Год журнала: 2024, Номер 18(11), С. 8360 - 8382

Опубликована: Март 8, 2024

Supramolecular hydrogels emerge as a promising paradigm for sutureless wound management. However, their translation is still challenged by the insufficient mechanical robustness in context of complex wounds dynamic tissues. Herein, we report tissue-adhesive supramolecular hydrogel membrane based on biocompatible precursors dressing highly tissues, featuring robust resilience through programmable strain-adaptive entanglement among microdomains. Specifically, are synthesized incorporating long-chain polyurethane segment into Schiff base-ligated short-chain oxidized cellulose/quaternized chitosan network via acylhydrazone bonding, which readily establishes interpenetrating entangled microdomains cross-linked matrices to enhance tear and fatigue resistance against extreme stresses. After being placed onto could efficiently absorb blood achieve rapid hemostasis. Moreover, metal ions released from ruptured erythrocytes be scavenged base linkers form additional ionic bonds, would trigger cross-linking components establish abundant crystalline microdomains, eventually leading situ stiffening endure heavy loads. Benefiting its hemostatic capacity strain adaptable performance, this shows promise clinical management various traumatic wounds.

Язык: Английский

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