Photoswitchable and Reversible Fluorescent Eutectogels for Conformal Information Encryption

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(46)

Published: Oct. 4, 2023

Smart fluorescent materials that can respond to environmental stimuli are of great importance in the fields information encryption and anti-counterfeiting. However, traditional usually face problems such as lack tunable fluorescence insufficient surface-adaptive adhesion, hindering their practical applications. Herein, inspired by glowing sucker octopus, we present a novel strategy fabricate reversible eutectogel with high transparency, adhesive self-healing performance for conformal Using anthracene luminescent unit, exhibits photoswitchable therefore be reversibly written/erased patterns non-contact stimulation. Additionally, different from mechanically irreversible adhesion via glue, adhere various irregular substrates over wide temperature range (-20 65 °C) conformally deform more than 1000 times without peeling off. Furthermore, exploiting transparency good stretchability eutectogel, dual achieved under UV stretching conditions further improve security level. This study should provide promising future development advanced intelligent anti-counterfeiting materials.

Language: Английский

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Supramolecular metallic foams with ultrahigh specific strength and sustainable recyclability

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: May 29, 2024

Language: Английский

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Core–Shell Nanostructured Assemblies Enable Ultrarobust, Notch‐Resistant and Self‐Healing Materials

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

Published: July 20, 2024

Abstract Actuators based on stimulus‐responsive soft materials have attracted widespread attention due to their significant advantages in flexibility and structural adaptability over traditional rigid actuators. However, the development of fast‐actuating, mechanical robust self‐healing actuators without compromising remains an ongoing challenge. Here, this study presents a photo‐responsive flexible actuator by incorporating core–shell liquid metal nano‐assemblies into polyurethane matrix construct dynamic supramolecular interface. The are endowed with adaptive characteristics external loading, being expected dissipate energy via reversible reconstruction hydrogen bonding deformation nano‐assemblies. obtained composites exhibit excellent strength (31 MPa), low modulus (2.02 high stretchability (1563.95%), autonomous (92.5%), NIR‐responsive actuation properties. Furthermore, combination cohesive but fluxible nano‐liquid core, strong interface not only achieves balance tensile also endows outstanding notch‐resistant performance (fracture energy≈58.8 kJ m −2 ) through multiphase dissipation. This work provides promising strategy for developing yet tough fields robotics artificial muscles.

Language: Английский

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Recent Advances in Polymer Nanocomposites: Unveiling the Frontier of Shape Memory and Self-Healing Properties—A Comprehensive Review

Molecules, Journal Year: 2024, Volume and Issue: 29(6), P. 1267 - 1267

Published: March 13, 2024

Shape memory and self-healing polymer nanocomposites have attracted considerable attention due to their modifiable properties promising applications. The incorporation of nanomaterials (polypyrrole, carboxyl methyl cellulose, carbon nanotubes, titania graphene, graphene oxide, mesoporous silica) into these polymers has significantly enhanced performance, opening up new avenues for diverse capability in depends on several factors, including heat, quadruple hydrogen bonding, π–π stacking, Diels–Alder reactions, metal–ligand coordination, which collectively govern the interactions within composite materials. Among possible interactions, only bonding between constituents been shown be effective facilitating at approximately room temperature. Conversely, thermo-responsive shape require elevated temperatures initiate healing recovery processes. Thermo-responsive (TRSMPs), light-actuated, magnetically actuated, Electrically actuated Memory Polymer Nanocomposite are discussed. This paper provides a comprehensive overview different types involved SMP SHP examines behavior both temperature conditions, along with biomedical many applications SMPs, special given (drug delivery, orthodontics, tissue engineering, orthopedics, endovascular surgery), aerospace (hinges, space deployable structures, morphing aircrafts), textile (breathable fabrics, reinforced electromagnetic interference shielding fabrics), sensor, electrical (triboelectric nanogenerators, information energy storage devices), electronic, paint coating, construction material (polymer cement composites)

Language: Английский

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Strong, healable materials with bio‐like ordered architectures and versatile functionality

SusMat, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Abstract The capacity of biological tissues to undergo self‐healing is crucial for the performance functions and continuation life. Conventional intrinsic materials demonstrate analogous functionality depending on dissociation‐recombination reversible bonds with no need extra repair agents. However, trade‐off relationship between mechanical strength kinetics in systems, coupled lack additional functionality, restricts their service life practical applications. Diversified highly ordered structures organisms significantly affect energy dissipation mechanism, signal transmission efficiency, molecular network reconstruction capability due multi‐dimensional differentiated macroscopic composite constructions, microscopic orientation textures, topologies/bonding types at level. These architectures exhibit distinctive strengthening mechanisms functionalities, which provide valuable references. This review aims providing current status advanced biomimetic internal micro/nanostructures. Through highlighting specific examples, classifications, design inspirations, fabrication strategies these newly developed based integrating dynamic interactions nano/microstructures are outlined. Furthermore, balance mechanisms, structure–functionalization relationships, potential application values discussed. concludes a perspective challenges, opportunities, prospects development, application, promotion self‐healable bio‐like architectures.

Language: Английский

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Chitinous Bioplastic Enabled by Noncovalent Assembly

ACS Nano, Journal Year: 2024, Volume and Issue: 18(12), P. 8906 - 8918

Published: March 14, 2024

Natural polymeric-based bioplastics usually lack good mechanical or processing performance. It is still challenging to achieve simultaneous improvement for these two usual trade-off features. Here, we demonstrate a full noncovalent mediated self-assembly design simultaneously improving the chitinous bioplastic and properties via plane hot-pressing. Tannic acid (TA) chosen as mediator (i) increase cross-link intensity obtaining tough network (ii) afford dynamic cross-links enable mobility of chitin molecular chains benefiting nanostructure rearrangement during shaping procedure. The multiple (chitin–TA chitin–chitin cross-links) pressure-induced orientation nanofibers structure endow with robust properties. relatively weak chitin–TA interactions serve water mediation switches enhance endowing chitin/TA hydroplastic properties, rendering them readily programmable into versatile 2D/3D shapes. Moreover, fully natural resourced exhibits superior weld, solvent resistance, biodegradability, enabling potential diverse applications. physical cross-linking mechanism highlights an effective concept balancing processability polymeric materials.

Language: Английский

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Programmable and Shape–Color Synchronous Dual-Response Wood with Thermal Stimulus

ACS Nano, Journal Year: 2024, Volume and Issue: 18(8), P. 6718 - 6730

Published: Jan. 26, 2024

Stimuli-responsive materials exhibit huge potential in sensors, actuators, and electronics; however, their further development for reinforcement, visualization, biomass-incorporation remains challenging. Herein, based on the impregnation of thermochromic microcapsule (TCM)-doped dynamic covalent vitrimers, a programmable shape-color dual-responsive wood (SRW-TC) was demonstrated with robust anisotropic structures exchangeable adaptable networks. Under mild conditions, resultant SRW-TC displays feasible shape memorability programmability, resulting from rigidity–flexibility shift induced by glass-transition temperature (34.99 °C) transesterification reaction triggered topology freezing transition (149.62 °C). Furthermore, obtained possesses satisfactory mechanical performance (tensile strength 45.70 MPa), thermal insulation (thermal conductivity 0.27 W/m K), light management, benign optical properties (transmittance 51.73% haze 99.67% at 800 nm). Importantly, incorporation compatible TCM enables to visualize memory feasibility rigidity/flexibility switching respond external stimulus through thermal-induced shape–color synchronous dual-responsiveness, which successfully demonstrates applications sensing temperature, grasping objects, encrypting/decoding icon messages, so on. The proposed facile highly effective strategy could serve as guideline developing high-performance multifunctional composite promising intelligent environmental sensing, interactivity, information dual-encryption, local precision color regulation, etc.

Language: Английский

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A transparent epoxy vitrimer with outstanding flame retardancy, toughness, and recyclability enabled by a hyperbranched P/N-derived polyester

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 470, P. 140673 - 140673

Published: March 6, 2025

Language: Английский

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High Toughness, Multi-dynamic Self-Healing Polyurethane for Outstanding Energy Harvesting and Sensing

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(50), P. 58806 - 58814

Published: Dec. 6, 2023

Triboelectric nanogenerators (TENGs) are an emerging class of energy harvesting devices with considerable potential across diverse applications, including wearable electronic and self-powered sensors. However, sustained contact, friction, incidental scratches during operation can lead to a deterioration in the electrical output performance TENG, thereby reducing its overall service life. To address this issue, we developed self-healing elastomer by incorporating disulfide bonds metal coordination into polyurethane (PU) chain. The resulting demonstrated exceptional toughness, high value 85 kJ m–3 impressive efficiency 85.5%. Specifically, TENG based on that PU generated short circuit current 12 μA, open voltage 120 V, transfer charge 38.5 nC within 2 cm × area, operating contact-separation mode. With external resistance 20 MΩ, achieved power density 2.1 W m–2. Notably, even after self-healing, was maintained at 95% undamaged device. Finally, employed construct noncontact sensing system be applied monitor human motion accurately. This research may expand application prospects materials future human–computer interaction fields.

Language: Английский

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Low-Cost, Scalable Fabrication of All-Fabric Piezoresistive Sensors via Binder-Free, In-Situ Welding of Carbon Nanotubes on Bicomponent Nonwovens

Advanced Fiber Materials, Journal Year: 2023, Volume and Issue: 6(1), P. 120 - 132

Published: Nov. 3, 2023

Language: Английский

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