The Rising Aerogel Fibers: Status, Challenges, and Opportunities

Advanced Science, Год журнала: 2023, Номер 10(9)

Опубликована: Янв. 19, 2023

Aerogel fibers garner tremendous scientific interest due to their unique properties such as ultrahigh porosity, large specific surface area, and ultralow thermal conductivity, enabling diverse potential applications in textile, environment, energy conversion storage, high-tech areas. Here, the fabrication methodologies construct aerogel starting from nanoscale building blocks are overviewed, spinning thermodynamics kinetics associated with each technology revealed. The huge pool of material choices that can be assembled into is discussed. Furthermore, fascinating fibers, including mechanical, thermal, sorptive, optical, fire-retardant elaborated on. Next, nano-confining functionalization strategy for particularly highlighted, touching upon driving force liquid encapsulation, solid-liquid interface adhesion, interfacial stability. In addition, emerging management, smart wearable fabrics, water harvest, shielding, heat transfer devices, artificial muscles, information Last, existing challenges development pointed out light shed on opportunities this burgeoning field.

Язык: Английский

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Engineering the pore environment of antiparallel stacked covalent organic frameworks for capture of iodine pollutants

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 26, 2024

Abstract Radioiodine capture from nuclear fuel waste and contaminated water sources is of enormous environmental importance, but remains technically challenging. Herein, we demonstrate robust covalent organic frameworks (COFs) with antiparallel stacked structures, excellent radiation resistance, high binding affinities toward I 2 , CH 3 I, − under various conditions. A neutral framework (ACOF-1) achieves a affinity through the cooperative functions pyridine-N hydrazine groups stacking layers, resulting in capacity ~2.16 g/g for ~0.74 at 25 °C dynamic adsorption Subsequently, post-synthetic methylation ACOF-1 converted sites to cationic pyridinium moieties, yielding (namely ACOF-1R) enhanced triiodide ion water. ACOF-1R can rapidly decontaminate iodine polluted groundwater drinking levels uptake ~4.46 established column breakthrough tests. The specific moieties make promising adsorbents radioiodine pollutants treatment practical

Язык: Английский

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Emerging Hydrogen-Bond Design for High-Performance Dynamic Polymeric Materials

ACS Materials Letters, Год журнала: 2023, Номер 5(2), С. 480 - 490

Опубликована: Янв. 13, 2023

The hydrogen bond, one of the simplest and most versatile noncovalent interactions, is essential for many dynamic functions in living systems. After long-term fundamental development, H-bond chemistry has been well established, with a large family molecular moieties tunable binding affinities available. In past several years, growing interest polymeric materials aroused series emerging applications material design. This Perspective aims at discussing design principles H-bond-based by summarizing state art recently emerged materials. Opportunities challenges are proposed to provide an overview this research topic, possible future directions, potential applications.

Язык: Английский

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Supramolecular metallic foams with ultrahigh specific strength and sustainable recyclability

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Май 29, 2024

Язык: Английский

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Mechanically Interlocked Polymers with Dense Mechanical Bonds

Accounts of Chemical Research, Год журнала: 2024, Номер 57(6), С. 992 - 1006

Опубликована: Фев. 28, 2024

ConspectusMechanically interlocked polymers (MIPs) such as polyrotaxanes and polycatenanes are polymer architectures that incorporate mechanical bonds, which represent a compelling frontier in science. MIPs with cross-linked structures known mechanically networks (MINs) widely utilized materials Leveraging the motion of MINs hold potential for achieving combination robustness dynamicity. Currently, reported predominantly consist discrete bonds cross-linking points, exemplified by well-known slide-ring rotaxane/catenane polymers. The these points facilitates redistribution tension throughout network, effectively preventing stress concentration thereby enhancing material toughness. In instances, impact can be likened to adage "small things make big difference", whereby limited number substantially elevate performance conventional addition there is another type MIN their principal parts chains composed dense bonds. Within MINs, generally serve repeating units, unique properties stem from integrating amplifying function large amount Consequently, tend reflect intrinsic polymers, making exploration critical comprehensive understanding MIPs. Nevertheless, investigations into featuring remain relatively scarce.This Account presents overview our investigation insights First, we delve synthetic strategies employed prepare while critically evaluating advantages limitations. Through meticulous control core interlocking step, three distinct have emerged: followed polymerization, supramolecular polymerization interlocking, dynamic interlocking. Furthermore, underscore structure–property relationships macroscopic originate countless microscopic motions phenomenon define an integration amplification mechanism. Our has revealed detailed characteristics bulk materials, encompassing quantification activation energy, discrimination varying distances, elucidation recovery process. Additionally, elucidated influence on respective materials. Moreover, explored applications leveraging exceptional These include toughness engineering adaptive multifunctional aerogels, mitigating Li protrusion interfacial layers lithium-ion batteries. Finally, offer personal perspectives promises, opportunities, key challenges future development underscoring transformative advancements this burgeoning field.

Язык: Английский

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Amplification of integrated microscopic motions of high-density [2]rotaxanes in mechanically interlocked networks

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

Опубликована: Ноя. 4, 2022

Abstract Integrating individual microscopic motion to perform tasks in macroscopic sale is common living organisms. However, developing artificial materials which molecular-level motions could be amplified behave macroscopically still challenging. Herein, we present a class of mechanically interlocked networks (MINs) carrying densely rotaxanated backbones as model system understand mechanical properties stemmed from the integration and amplification intramolecular embedded [2]rotaxane motifs. On one hand, bonds introduces original dangling chains into network, synergy numerous such leads an expansion entire imparting good stretchability puncture resistance MINs. other dissociation host−guest recognition subsequent sliding represent peculiar energy dissipation pathway, whose result bulk with favorable toughness damping capacity. Thereinto, develop continuous stress-relaxation method elucidate units, contributes understanding relationship between cumulative performance.

Язык: Английский

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Durable Lithium Metal Anodes Enabled by Interfacial Layers Based on Mechanically Interlocked Networks Capable of Energy Dissipation

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(52)

Опубликована: Ноя. 4, 2022

Solid electrolyte interphase (SEI) has received considerable attention due to its vital role in stabilizing Li anode. However, native and many artificial SEIs often suffer from cracking fragmentation under dendrite impact or long-term repeated volume variation, causing capacity decay. Herein, a mechanically interlocked network (MIN) was innovatively designed as interfacial layer protect anode by incorporating the unique energy dissipation capability, which helps survive variation during cycling. As result, symmetric cell with MIN-coated (MIN@Li) exhibited prolonged cycling life of 1500 hours at 1 mA cm-2 . The full using LFP cathode (13.5 mg ) cycled stably for 500 cycles retention over 88 % (1 C). Our results highlight creative application MIN anode, capability promises future success other battery fields suffering variations.

Язык: Английский

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Novel conductive metallo-supramolecular polymer AIE gel for multi-channel highly sensitive detection of hydrazine hydrate

Chinese Chemical Letters, Год журнала: 2022, Номер 34(8), С. 108082 - 108082

Опубликована: Дек. 17, 2022

Язык: Английский

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Oligo[2]catenane That Is Robust at Both the Microscopic and Macroscopic Scales

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(16), С. 9011 - 9020

Опубликована: Апрель 13, 2023

Polycatenanes are extremely attractive topological architectures on account of their high degrees conformational freedom and multiple motion patterns the mechanically interlocked macrocycles. However, exploitation these peculiar structural dynamic characteristics to develop robust catenane materials is still a challenging goal. Herein, we synthesize an oligo[2]catenane that showcases properties at both microscopic macroscopic scales. The key feature design controlling force-bearing points metal-coordinated core [2]catenane moiety able maximize energy dissipation via dissociation metal-coordination bonds then activation sequential intramolecular motions circumrotation, translation, elongation under external force. As such, level, single-molecule force spectroscopy measurement exhibits rupture in reaches record 588 ± 233 pN. At our manifests itself as toughest material ever reported (15.2 vs 2.43 MJ/m3). These fundamental findings not only deepen understanding structure-property relationship poly[2]catenanes with full set features but also provide guiding principle fabricate high-performance materials.

Язык: Английский

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Enhancing the Toughness and Strength of Polymers Using Mechanically Interlocked Hydrogen Bonds

Journal of the American Chemical Society, Год журнала: 2023, Номер 146(1), С. 1109 - 1121

Опубликована: Дек. 23, 2023

The energy dissipative features of hydrogen bonds under conditions mechanical strain have provided an ongoing incentive to explore bonding units for the purpose controlling and customizing properties polymeric materials. However, there remains a need bond that (1) possess directionality, (2) provide selectivity, (3) dissipate effectively, (4) can be incorporated readily into materials regulate their properties. Here, we report mechanically interlocked incorporate multiple within [2]catenane structure. conformational flexibility associated spatial folding characteristics allow molecular scale motion external stress, while structure serves as pivot maintains directionality selectivity resultant units. When polymers, these motifs serve strengthen toughen resulting This study not only presents novel unit creating with improved but also underscores unique opportunities structures may across diverse range applications.

Язык: Английский

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