Highly Thermally Conductive Liquid Crystalline Epoxy Resin Vitrimers with Reconfigurable, Shape‐Memory, Photo‐Thermal, and Closed‐Loop Recycling Performance

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 22, 2024

Abstract The low thermal conductivity, poor toughness, and non‐reprocessability of thermosetting epoxy resins severely restrict their applications sustainable development in flexible electronics. Herein, liquid crystalline (LCE) dynamic ester disulfide bonds are introduced into the cured network bisphenol A resin (E‐51) to construct highly thermally conductive (LCER) vitrimers. LCER vitrimers demonstrate adjustable mechanical properties by varying ratio LCE E‐51, allowing it transition from soft strong. Typically, a 75 mol% 25 E‐51 results an in‐plane conductivity ( λ ) 1.27 W m −1 K , over double that pure vitrimer (0.61 ). tensile strength toughness increase 2.88 folds 14.1 MPa 2.45 20.1 MJ −3 respectively. Besides, phase covalent enable triple shape memory three‐dimensional reconstruction. After four reprocessing cycles, remain at 94% 72%, Integrating carbon nanotubes (CNTs) imparts photo‐thermal effect enables “on” “off” switch under near‐infrared light vitrimer. Furthermore, CNTs/LCER displays light‐induced actuation, self‐repairing, self‐welding besides closed‐loop recycling rapid degradation performance.

Язык: Английский

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Biomimetic artificial neuromuscular fiber bundles with built-in adaptive feedback

Matter, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Язык: Английский

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Research Progress of Bioinspired Structural Color in Camouflage

Materials, Год журнала: 2024, Номер 17(11), С. 2564 - 2564

Опубликована: Май 27, 2024

Bioinspired structural color represents a burgeoning field that draws upon principles, strategies, and concepts derived from biological systems to inspire the design of novel technologies or products featuring reversible changing mechanisms, with significant potential applications for camouflage, sensors, anticounterfeiting, etc. This mini-review focuses specifically on research progress bioinspired in realm camouflage. Firstly, it discusses fundamental mechanisms coloration systems, encompassing pigmentation, coloration, fluorescence, bioluminescence. Subsequently, delineates three modulation strategies—namely, photonic crystals, film interference, plasmonic modulation—that contribute development materials devices. Moreover, review critically assesses integration environmental contexts, particular emphasis their application Finally, paper outlines persisting challenges suggests future trends camouflage via color.

Язык: Английский

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Untethered Soft Robots Based on 1D and 2D Nanomaterials

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 21, 2025

Abstract Biological structures exhibit autonomous and intelligent behaviors, such as movement, perception, responses to environmental changes, through dynamic interactions with their surroundings. Inspired by natural organisms, future soft robots are also advancing toward autonomy, sustainability, interactivity. This review summarizes the latest achievements in untethered based on 1D 2D nanomaterials. First, performance of actuators designed different is compared. Then, development basic locomotion forms, including crawling, jumping, swimming, rolling, gripping, multimodal, mimicking biological motion mechanisms under stimuli, discussed. Subsequently, various self‐sustained movements imbalance static stimuli introduced, light tracking, self‐oscillating, self‐crawling, self‐rolling, flying. Following that, progress integrated additional functionalities sensing, energy harvesting, storage summarized. Finally, challenges faced this field prospects for

Язык: Английский

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Achieving rapid actuation in liquid crystal elastomers

National Science Open, Год журнала: 2024, Номер unknown, С. 20240013 - 20240013

Опубликована: Июнь 1, 2024

Liquid crystal elastomer (LCE) is a soft actuating material capable of producing large and reversible actuation strain, versatile modes, high work density, which can be exploited for next-generation robots. However, the slow response speed low power density in LCE-based actuators remain challenge, limiting their practical applications. Researchers have been considering how to improve these performances. In this review, we discuss fundamentals LCEs emphasize fast strategies developed recent years. Firstly, introduce conventional preparation strategies. Then, describe mechanisms LCEs, discussing features limitations. third part, summarize several possible approaches as case studies enhance performance including reducing physical sizes, introducing active heating cooling mechanisms, utilizing mechanical instability, developing dielectric LCEs. Finally, future research opportunities challenges rapid

Язык: Английский

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Bimodal Photothermal-driven Self-sustained Oscillator Based on MXene Structure

Carbon, Год журнала: 2024, Номер unknown, С. 119878 - 119878

Опубликована: Дек. 1, 2024

Язык: Английский

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Advanced Materials Research at CUHK: From Biomedicine to Electronics and Beyond

Advanced Materials, Год журнала: 2025, Номер 37(2)

Опубликована: Янв. 1, 2025

This special issue spans a diverse array of topics, including nanomedicine, tissue engineering, regenerative medicine, organs-on-chips, biosensing, soft robotics, smart devices, nanofabrication, energy saving and storage, catalysis, spintronics, electronics, neuromorphic computing. It showcases the breadth depth advanced materials research at Chinese University Hong Kong (CUHK), highlighting innovation, collaboration, excellence CUHK's scientists.

Язык: Английский

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Renewable Fluorescent Liquid Crystal Elastomers for Potential Use in Temperature Indicator During Short-time Vaccine Transportation

Chinese Journal of Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Язык: Английский

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Continuous Porous Aromatic Framework Membrane with Acid/Base-induced Reversible Isomerization for Switchable Ion Conductivity

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Continuous porous aromatic framework membranes were designed and constructed to achieve the first example of ion conductive frameworks continuous that dynamically respond chemical acid/base stimulus.

Язык: Английский

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Artificial synapse‐based intelligent light‐controlled liquid crystal network actuators

InfoMat, Год журнала: 2025, Номер unknown

Опубликована: Март 12, 2025

Abstract Various forms of intelligent light‐controlled soft actuators and robots rely on advanced material architectures bionic systems to enable programmable remote actuation multifunctionality. Despite advancements, significant challenges remain in developing that can effectively mimic the low‐intensity, wide‐wavelength light signal sensing processing functions observed living organisms. Herein, we report a design strategy integrates light‐responsive artificial synapses (AS) with liquid crystal networks (LCNs) create LCN (AS‐LCNs). Remarkably, AS‐LCNs be controlled intensities as low 0.68 mW cm −2 , value comparable intensity perceivable by human eye. These perform sensing, learning, memory within wide wavelength range from 365 nm 808 nm. Additionally, our system demonstrates time‐related proofs concept for tachycardia alarm porcupine defense behavior simulation. Overall, this work addresses limitations traditional reception processing, paving way development emulate cognitive abilities image

Язык: Английский

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