Recent Advances in Shape Memory Polymers: Multifunctional Materials, Multiscale Structures, and Applications

Advanced Functional Materials, Год журнала: 2023, Номер 34(14)

Опубликована: Дек. 24, 2023

Abstract Shape memory polymers (SMPs) are one of the primary directions in development modern high‐tech new materials, which integrated with sensing, actuation, information processing, and autonomous deformation. Here, multifunctional shape focused a detailed introduction to characteristics self‐deformation, self‐sensing, self‐healing, self‐learning is provided. Integrating other functional materials form polymer composites (SMPC), designing controlling material structure organization at microscale, thereby achieving more precise controllable effects expanding potential applications. Ultimately, it shown that SMPs their have wide range fascinating applications fields robotics, smart clothing, textiles, biomedical devices, wearable technology. will thus continue play significant role future deeper exploration.

Язык: Английский

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Experimental characterization and numerical investigation on different conformal lattice structures for specific energy absorption under quasi-static and dynamic loading

International Journal of Protective Structures, Год журнала: 2025, Номер unknown

Опубликована: Фев. 18, 2025

Lattice structures exhibit significant potential for superior energy absorption under both static and dynamic loading conditions when compared to solid infill designs. This advantage arises from their distinctive properties, including low relative density, high flexibility, enhanced compressibility. In this study, a novel type of lattice structure, termed the Different Conformal Structure (DCLS), was developed. DCLS is constructed through tessellation Simple Cubic (SC), Body-Centered (BCC), Face-Centered (FCC) configurations. The were designed using Fusion360, incorporating optimized geometries characterized by constant variable densities achieved varying strut diameters individual lattices. Fabrication performed Stereolithography (SLA) process, subjected quasi-static compression testing on universal machine. Additionally, characterization conducted Split Hopkinson Pressure Bar (SHPB) apparatus, results with finite element simulations. Experimental findings revealed that specific configurations, particularly EVT-BFS-2.5, demonstrated exceptional performance, achieving highest (SEA) values, exceeding 28 MPa loading. represents an impressive 1866.97% increase testing. Finite analysis corroborated these experimental results, showing excellent agreement validating accuracy study underscores patterns significantly enhance capabilities. These position as promising solution applications demanding lightweight, high-performance energy-dissipative materials.

Язык: Английский

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Photothermal-responsive lignin-based polyurethane with mechanically robust, fast self-healing, solid-state plasticity and shape-memory performance

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 271, С. 132499 - 132499

Опубликована: Май 20, 2024

Язык: Английский

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3D printing of active mechanical metamaterials: A critical review

Materials & Design, Год журнала: 2024, Номер unknown, С. 113305 - 113305

Опубликована: Сен. 1, 2024

Язык: Английский

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Highly sensitive split ring resonator-based sensor for quality monitoring of edible oils

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 17, 2025

This research presents the design and analysis of a compact metamaterial (MTM)-based star-shaped split-ring resonator (SRR) enclosed in square, constructed on cost-effective substrate for liquid chemical sensing applications. The designed structure has dimensions 10 × mm2 is optimized detecting adulteration edible oils. When sample holder filled with different percentages oil samples, resonance frequency MTM-based SRR sensor shift significantly. measured results demonstrate that proposed superior terms sensitivity quality factor compared to studies literature. shows performance (Q-factor) existing sensors It exhibits remarkable 0.92 760 MHz detection, which higher than shifts ranging from 140 600 reported previous studies. Additionally, high Q-factor 149, indicating its efficiency determining error rate minimal at 3.1%, significant improvement over prior sensors, have rates as 8%. These enhancements highlight sensor's potential applications requiring precise, efficient, detection adulteration, thus offering advancement both practical utility traditional methods.

Язык: Английский

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Electrospun Cellulose Nanocrystals Reinforced Flexible Sensing Paper for Triboelectric Energy Harvesting and Dynamic Self‐Powered Tactile Perception

Small, Год журнала: 2023, Номер 20(17)

Опубликована: Дек. 5, 2023

Abstract The technical synergy between flexible sensing paper and triboelectric nanogenerator (TENG) in the next stage of artificial intelligence Internet Things engineering makes development intelligent with function very attractive. Therefore, it is extremely urgent to explore functional papers that are more suitable for sensing. Here, a cellulose nanocrystals (CNCs) reinforced PVDF hybrid (CPHP) developed by electrospinning technology. Benefitting from unique effects CNCs, CPHP forms solid cross‐linked network among fibers obtains high‐strength (25 MPa) paper‐like state high surface roughness. Meanwhile, CNCs also improve triboelectrification effect assisting matrix form electroactive phases (96% share) higher relative permittivity (17.9). CPHP‐based TENG single electrode configuration demonstrates good output performance (open‐circuit voltage 116 V, short‐circuit current 2.2 µA power density 91 mW m −2 ) ultrahigh pressure‐sensitivity response (3.95 mV Pa −1 ), which endows reliable supply capability. More importantly, self‐powered tactile sensor array exhibits multifunctional applications imitation Morse code compilation, track recognition, game character control, showing great prospects inductive device human–machine interaction.

Язык: Английский

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Structurally Transformable and Reconfigurable Hydrogel-Based Mechanical Metamaterials and Their Application in Biomedical Stents

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 2, 2025

Mechanical metamaterials exhibit several unusual mechanical properties, such as a negative Poisson's ratio, which impart additional capabilities to materials. Recently, hydrogels have emerged exceptional candidates for fabricating that offer enhanced functionality and expanded applications due their unique responsive characteristics. However, the adaptability of these remains constrained underutilized, they lack integration hydrogels' soft characteristics with metamaterial design. Here, we propose structurally transformable reconfigurable hydrogel-based through three-dimensional (3D) printing lattice structures composed multishape-memory poly(acrylic acid)-chitosan hydrogels. By incorporating reversible shape-memory mechanisms control structural arrangements lattice, can under various environmental conditions, including auxetic behavior, ratios switchable from zero or positive. These adaptable responses across different states arise changes in surpassing gradual observed conventional stimuli-responsive The application multimode biomedical stents demonstrates practical settings, allowing them transition between expandable, nonexpandable, shrinkable states, corresponding ratios. integrating materials design, significantly enhance functionality, advancing development smart biomaterials.

Язык: Английский

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Construction of mechanical metamaterials and their extraordinary functions

Composite Structures, Год журнала: 2025, Номер unknown, С. 118872 - 118872

Опубликована: Янв. 1, 2025

Язык: Английский

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3D-printed thermoplastic polyurethane/polyvinylidene fluoride gradient stiffness and hierarchical cellular structures with tailored energy absorption behavior

Additive manufacturing, Год журнала: 2024, Номер 83, С. 104062 - 104062

Опубликована: Фев. 28, 2024

Язык: Английский

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Origami metamaterial biomimetic bouquets expand floriography to spatiotemporal 4D

Cell Reports Physical Science, Год журнала: 2024, Номер 5(4), С. 101921 - 101921

Опубликована: Апрель 1, 2024

Mechanical metamaterials have demonstrated their potential as programmable structural materials with tailorable deformative responses. The existing mechanical exhibited to mimic certain flowers; however, it is of interest expand the mimicry from morphological imitation in spatial dimension (i.e., unchangeable over time) multifunctional biomimicry spatiotemporal dimension. Here, we report origami metamaterial biomimetic bouquets that combine information processing time for floriography 4D. not only key characteristics lily's growing process bud and bloom) but, more innovatively, also traditional time-independent expression species, color, quantity) fourth changeable status through binary digital abstraction. This research opens a horizon bio-inspired intelligent devices systems rationally designing assembling new-generation metamaterials.

Язык: Английский

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