Recent Progress on Nanocellulose Aerogels: Preparation, Modification, Composite Fabrication, Applications

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(11)

Published: Feb. 3, 2021

The rapid development of modern industry and excessive consumption petroleum-based polymers have triggered a double crisis presenting shortage nonrenewable resources environmental pollution. However, this has provided an opportunity to stimulate researchers harness native biobased materials for novel advanced applications. Nanocellulose-based aerogels, using abundant sustainable cellulose as raw material, present third-generation aerogels that combine traditional with high porosity large specific surface area, well the excellent properties itself. Currently, nanocellulose provide highly attention-catching platform wide range functional applications in various fields, e.g., adsorption, separation, energy storage, thermal insulation, electromagnetic interference shielding, biomedical Here, preparation methods, modification strategies, composite fabrications, further are summarized, additional discussions regarding prospects potential challenges future development.

Language: Английский

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A Review on Graphene‐Based Electromagnetic Functional Materials: Electromagnetic Wave Shielding and Absorption

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(42)

Published: July 1, 2022

Abstract Electromagnetic (EM) functional materials play an increasingly important role in solving EM wave pollution both modern military and civil fields. Graphene‐based are the most promising candidates applications of shielding absorption owing to their remarkable structures enhanced properties. Designing graphene‐based with elaborately controlled microstructures optimized properties can effectively improve energy attenuation conversion. Herein, study begins mechanism, multiscale design strategies outlined, including molecular‐scale, micro/nanoscale structure, macroscale integration assembly strategies. Applications fields reviewed, focusing on latest advances assemblies such as films, fabrics, composites. Finally, current challenges future directions this fast‐growing field predicted.

Language: Английский

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Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(11), P. 5979 - 5994

Published: Jan. 1, 2021

A rapid-cycling continuous solar-driven atmospheric water harvester, enabled by vertically aligned nanocomposite sorbent, was developed for realizing ultrahigh production.

Language: Английский

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Ultralight Magnetic and Dielectric Aerogels Achieved by Metal–Organic Framework Initiated Gelation of Graphene Oxide for Enhanced Microwave Absorption

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: April 19, 2022

Metal-organic frameworks (MOFs) are used to directly initiate the gelation of graphene oxide (GO), producing MOF/rGO aerogels. The ultralight magnetic and dielectric aerogels show remarkable microwave absorption performance with ultralow filling contents. development a convenient methodology for synthesizing hierarchically porous comprising metal-organic (GO) building blocks that exhibit an density uniformly distributed MOFs on GO sheets is important various applications. Herein, we report facile route MOF/reduced (rGO) based GO, which initiated using MOF crystals. Free metal ions exposed surface MIL-88A nanorods act as linkers bind nanosheets three-dimensional network via metal-oxygen covalent or electrostatic interactions. MOF/rGO-derived Fe3O4@C/rGO Ni-doped notable (MA) performance, simultaneously achieving strong broad bandwidth at low thickness 2.5 (- 58.1 dB 6.48 GHz) 2.8 mm 46.2 7.92 contents 0.7 0.6 wt%, respectively. attenuation ability prepared further confirmed radar cross-sectional simulation, attributed synergistic effects their structures heterointerface engineering. This work provides effective pathway fabricating hybrid offers MA.

Language: Английский

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Design of cellular structure of graphene aerogels for electromagnetic wave absorption

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 426, P. 131894 - 131894

Published: Aug. 20, 2021

Language: Английский

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Lightweight, Fire‐Retardant, and Anti‐Compressed Honeycombed‐Like Carbon Aerogels for Thermal Management and High‐Efficiency Electromagnetic Absorbing Properties

Small, Journal Year: 2021, Volume and Issue: 17(33)

Published: July 11, 2021

Abstract Ordered porous carbon materials (PCMs) have potential applications in various fields due to their low mass densities and features. However, it yet remains extremely challenging construct PCMs with multifunctionalization for electromagnetic wave absorption. Herein, the honeycombed‐like aerogels embedded Co@C nanoparticles are fabricated by a directionally freeze‐casting carbonization method. The optimized aerogel possesses density (0.017 g cm −3 ), fire‐retardant, robust mechanical performance (compression moduli reach 1411 420 kPa longitudinal transverse directions at 80% strain, respectively), high thermal management (high insulation capability high‐efficiency electrothermal conversion ability). Notably, exhibits excellent absorption properties broad effective bandwidth (13.12–17.14 GHz) strong (−45.02 dB) thickness of only 1.5 mm. Density functional theory calculations experimental results demonstrate that stem from synergetic effects among electrical conductivity, numerous interfaces dipoles unique ordered structure. Meanwhile, computer simulation technology (CST) confirms multifunctional can attenuate more energy practical environment. This work paves way rational design fabrication next‐generation absorbing materials.

Language: Английский

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3D‐Printed Anisotropic Polymer Materials for Functional Applications

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(5)

Published: Oct. 26, 2021

Anisotropy is the characteristic of a material to exhibit variations in its mechanical, electrical, thermal, optical properties, etc. along different directions. Anisotropic materials have attracted great research interest because their wide applications aerospace, sensing, soft robotics, and tissue engineering. 3D printing provides exceptional advantages achieving controlled compositions complex architecture, thereby enabling manufacture objects with anisotropic functionalities. Here, comprehensive review recent progress on polymer based techniques including extrusion, vat photopolymerization, powder bed fusion, sheet lamination presented. The state-of-the-art strategies implemented manipulating structures are highlighted discussion categories, functionalities, potential applications. This concluded analyzing current challenges providing perspectives for further development this field.

Language: Английский

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A review of 3D printed porous ceramics

Journal of the European Ceramic Society, Journal Year: 2022, Volume and Issue: 42(8), P. 3351 - 3373

Published: Feb. 23, 2022

Language: Английский

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Graphene‐Supported Atomically Dispersed Metals as Bifunctional Catalysts for Next‐Generation Batteries Based on Conversion Reactions

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(5)

Published: Oct. 22, 2021

Next-generation batteries based on conversion reactions, including aqueous metal-air batteries, nonaqueous alkali metal-O2 and -CO2 metal-chalcogen metal-ion have attracted great interest. However, their use is restricted by inefficient reversible of active agents. Developing bifunctional catalysts to accelerate the reaction kinetics in both discharge charge processes urgently needed. Graphene-, or graphene-like carbon-supported atomically dispersed metal (G-ADMCs) been demonstrated show excellent activity various electrocatalytic making them promising candidates. Different from G-ADMCs for catalysis, which only require high one direction, rechargeable should provide discharging charging. This review provides guidance design fabrication next-generation reactions. The key challenges that prevent conversion, origin G-ADMCs, current principles highly analyzed highlighted each conversion-type battery. Finally, a summary outlook development G-ADMC materials with energy density efficiency are given.

Language: Английский

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Ice Templating Soft Matter: Fundamental Principles and Fabrication Approaches to Tailor Pore Structure and Morphology and Their Biomedical Applications

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(34)

Published: July 8, 2021

Abstract Porous scaffolds are widely used in biomedical applications where pore size and morphology influence a range of biological processes, including mass transfer solutes, cellular interactions organization, immune responses, tissue vascularization, as well drug delivery from biomaterials. Ice templating, one the most utilized techniques for fabrication porous materials, allows control over by controlling ice formation suspension solutes. By fine‐tuning freezing solute parameters, templating can be to incorporate pores with tunable morphological features into wide materials using simple, accessible, scalable process. While soft matter is templated includes commercial clinical products, principles underpinning its not reviewed their inorganic counterparts. This review describes critically evaluates fundamental principles, characterization approaches, polymer‐based It utility applications, highlighting mechanisms impacted features, outlines physical thermodynamic common setups, complexities specific polymers, discusses future directions this field.

Language: Английский

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