Strong and Tough Physical Eutectogels Regulated by the Spatiotemporal Expression of Non‐Covalent Interactions

Advanced Functional Materials, Год журнала: 2022, Номер 32(41)

Опубликована: Авг. 5, 2022

Abstract Physical eutectogels are appealing materials for technological devices due to their superior ionic conductivity, thermal and electrochemical stability, non‐volatility, low cost. Nevertheless, current physical suffering from weak mechanical strength toughness. Here, taking advantage of the distribution difference polyvinyl alcohol (PVA) in water deep eutectic solvents (DESs), a simple universal solvent‐replacement approach is proposed regulate spatiotemporal expression intra/interpolymer interactions prepare strong tough eutectogels. The exchange DESs with can restrengthen weakened between PVA chains water, enabling crystallize construct uniform robust polymer network. Consequently, resultant eutectogel exhibits record‐high (20.2 MPa), toughness (62.7 MJ m –3 ), tear‐resistance (tearing energy Σ42.4 kJ –2 while possessing excellent stretchability (Σ550% strain), repairability, adhesive performance. Furthermore, this strategy proven be universally applicable various species polymers, even utilized fabricate continuous conductive fibers, demonstrating potential as engineering wearable sensors.

Язык: Английский

---

Peptide-enhanced tough, resilient and adhesive eutectogels for highly reliable strain/pressure sensing under extreme conditions

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Ноя. 5, 2022

Abstract Natural gels and biomimetic hydrogel materials have been able to achieve outstanding integrated mechanical properties due the gain of natural biological structures. However, nearly every structure relies on water as solvents or carriers, which limits possibility in extreme conditions, such sub-zero temperatures long-term application. Here, peptide-enhanced eutectic were synthesized by introducing α-helical “molecular spring” into deep solvent. The gel takes full advantage structure, achieving high tensile/compression, good resilience, superior fracture toughness, excellent fatigue resistance strong adhesion, while it also inherits benefits solvent solves problems volatilization freezing. This enables unprecedentedly long stable sensing human motion movement. electrical signal shows almost no drift even after 10,000 deformations for 29 hours −20 °C 80 temperature range.

Язык: Английский

---

Highly stretchable, self-healing, and adhesive polymeric eutectogel enabled by hydrogen-bond networks for wearable strain sensor

Chemical Engineering Journal, Год журнала: 2022, Номер 449, С. 137878 - 137878

Опубликована: Июль 2, 2022

Язык: Английский

---

Evolutionary Reinforcement of Polymer Networks: A Stepwise‐Enhanced Strategy for Ultrarobust Eutectogels

Advanced Materials, Год журнала: 2023, Номер 36(6)

Опубликована: Ноя. 8, 2023

Abstract Gel materials are appealing due to their diverse applications in biomedicine, soft electronics, sensors, and actuators. Nevertheless, the existing synthetic gels often plagued by feeble network structures inherent defects associated with solvents, which compromise mechanical load‐bearing capacity cast persistent doubts about reliability. Herein, combined attractive deep eutectic solvent (DES), a stepwise‐enhanced strategy is presented fabricate ultrarobust eutectogels. It focuses on continuous modulation optimization of polymer networks through complementary annealing exchange processes, drives progressive increase both quantity mass interconnected chains at microscopic scale, hence contributing evolutionary enhancement structure. The resultant eutectogel exhibits superb properties, including record‐breaking strength (31.8 MPa), toughness (76.0 MJ m −3 ), Young's modulus (25.6 together exceptional resistance ability tear crack propagation. Moreover, this able be further programmed photolithography situ create patterned for imparting specific functionalities. Enhanced its broad applicability various DES combinations, poised serve as crucial template methodology future development robust gels.

Язык: Английский

---

Deep eutectic solvents as an emerging green platform for the synthesis of functional materials

Green Chemistry, Год журнала: 2024, Номер 26(7), С. 3627 - 3669

Опубликована: Янв. 1, 2024

Deep eutectic solvents (DESs) enable many processes to be environmentally friendly. This Tutorial Review aims showcase the roles of DESs in synthesis functional materials from a green chemistry perspective.

Язык: Английский

---

Conductive Hyaluronic Acid/Deep Eutectic Solvent Composite Hydrogel as a Wound Dressing for Promoting Skin Burn Healing Under Electrical Stimulation

Advanced Healthcare Materials, Год журнала: 2024, Номер 13(17)

Опубликована: Апрель 3, 2024

Abstract Burns can cause severe damage to the skin due bacterial infection and inflammation. Although conductive hydrogels as electroactive burn‐wound dressings achieve remarkable effects on accelerating wound healing, issues such imbalance between their high conductivity mechanical properties, easy dehydration, low transparency must be addressed. Herein, a double‐network eutectogel is fabricated by integrating polymerizable deep eutectic solvents (PDESs)including acrylamide/choline chloride/glycerol (acrylamide‐polymerization crosslink) thiolated hyaluronic acid (disulfide‐bonding crosslink). The introduction of PDESs provides with (up 0.25 S·m −1 ) strength (tensile strain 59–77%) simulating those natural human skin, well satisfactory tissue adhesiveness, self‐healing ability, antibacterial properties. When combined exogenous electrical stimulation, exhibits ability reduce inflammation, stimulate cell proliferation migration, promote collagen deposition angiogenesis, facilitate remodeling. This shows great potential dressing for healing major burn wounds.

Язык: Английский

---

High tensile properties, wide temperature tolerance, and DLP-printable eutectogels for microarrays wearable strain sensors

Chemical Engineering Journal, Год журнала: 2024, Номер 481, С. 149004 - 149004

Опубликована: Янв. 23, 2024

Язык: Английский

---

Zwitterionic Eutectogels with High Ionic Conductivity for Environmentally Tolerant and Self-Healing Triboelectric Nanogenerators

ACS Nano, Год журнала: 2024, Номер 18(29), С. 18980 - 18991

Опубликована: Июль 8, 2024

Eutectogels have garnered considerable attention for the development of wearable devices, owing to their inherent mechanical elasticity, ionic conductivity, affordability, and environmental compatibility. However, low conductivity existing eutectogels has impeded progression in electronic applications. Here, we report a zwitterionic eutectogel with an impressive up 15.7 mS cm–1. The incorporation groups into creates ample mobile charges by dissociating cation anion solvents, thereby yielding exceptional conductivity. Moreover, abundant electrostatic hydrogen bonding interactions within endow it prominent self-healing adhesive properties. By integrating roughly patterned polydimethylsiloxane film, successfully constructed triboelectric nanogenerator (TENG) maximum output power density 112 mW m–2. This TENG is capable generating stable electrical signals even extreme temperature conditions ranging from −80 100 °C effectively powering devices. Furthermore, assembled displays high sensitivity as self-powered sensor, enabling real-time precise monitoring derived human motions. study establishes promising approach sustainable multifunctional flexible electronics that are resilient environments.

Язык: Английский

---

Versatile Quasi‐Solid Ionic Conductive Elastomer Inspired by Desertification Control Strategy for Soft Iontronics

Advanced Functional Materials, Год журнала: 2023, Номер 33(43)

Опубликована: Июнь 21, 2023

Abstract Ionic conductors, such as hydrogels, ionogels, and eutectogels, have attained considerable research interest in various advanced application scenarios. However, ionic conductors still suffer from the restriction of inherent liquid compositions, which may leak or evaporate. Herein, inspired by control strategy desertification caused soil erosion, a novel internal‐external dual enhancement design strategy, i.e., increasing interaction between filler itself its matrix, is proposed to firmly embed deep eutectic solvent (DES) into polyurethane (PU) prevent leakage, that prepared conductive elastomers (PU‐DESs) are quasi‐solid. The PU‐DESs exhibit marvelous versatility including high stretchability, tensile strength, toughness, self‐healing efficiency, antibacterial ability, conductivity, excellent freezing tolerance. More intriguingly, benefiting their quasi‐solid feature, endowed with long‐term environmental stability. Thanks these superb versatile features, further successfully applied wearable sensor triboelectric nanogenerator (TENG) for monitoring human motions converting mechanical energy electrical energy, breaking away limitations previous most soft iontronics leakage evaporation weak strength. Hence, this study establishes an effective material demanding stability durability.

Язык: Английский

---

Highly stretchable, repeatable, and easy-to-prepare ionogel based on polyvinyl chloride for wearable strain sensors

Nano Energy, Год журнала: 2023, Номер 113, С. 108535 - 108535

Опубликована: Май 17, 2023

Язык: Английский

---