Nanocellulose‐MXene Biomimetic Aerogels with Orientation‐Tunable Electromagnetic Interference Shielding Performance

Zeng, Zhihui; Wang, Changxian; Siqueira, Gilberto; Han, Daxin; Huch, Anja; Abdolhosseinzadeh, Sina; Heier, Jakob; Nüesch, Frank; Zhang, Chuanfang; Nyström, Gustav

doi:10.1002/advs.202000979

Cited by 345 publications

(272 citation statements)

References 59 publications

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“…utilized the TEMPO‐oxidized CNFs with a high aspect ratio to stabilize the large MXene monolayers because of electrostatic repulsions of abundantly available negatively charged carboxyl groups ( Figure a). [ 99 ] The uniform MXene/CNF aqueous dispersions could be obtained (Figure 15b) because of noncovalent interactions formed between the CNFs and MXene nanosheets with similar hydrophilicity and surface hydroxyl‐containing groups (Figure 15c), facilitating the subsequent assembly of the intact pore wall of the aerogel. Liu et al.…”

Section: Modification Of Nanocellulose Aerogels and Composite Fabricamentioning

confidence: 99%

“…a–c) Reproduced under the terms of the CC‐BY Creative Commons Attribution 4.0 International license ( https://creativecommons.org/licenses/by/4.0). [ 99 ] Copyright 2020, The Authors, published by Wiley‐VCH. d–f) Photographic images of the SiO 2 aerogel, CNF aerogel, and CNF/SiO 2 composite aerogel after drying.…”

Section: Modification Of Nanocellulose Aerogels and Composite Fabricamentioning

confidence: 99%

“…For mobile charge carriers to interact with the incoming EM field and for the porous structure to promote the multiple reflections, adsorption of EM waves plays an important role. Compared with other 1D or 2D conducting composites, nanocellulose composite aerogels exhibited promising properties for EMI shielding by introducing novel conductive fillers (e.g., silver nanowires (AgNWs), [ 53a ] MXene [ 99,180 ] ), as they can combine advantages of nanocellulose, conductive fillers, and aerogels including i) biocompatibility, biodegradability, and chemical stability, ii) excellent electrical conductivity, and iii) ultralow density, large open pores, and ultrahigh SSA.…”

Section: Applications Of Nanocellulose Aerogelsmentioning

confidence: 99%

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

et al. 2021

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

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Section: Modification Of Nanocellulose Aerogels and Composite Fabricamentioning

confidence: 99%

Section: Modification Of Nanocellulose Aerogels and Composite Fabricamentioning

confidence: 99%

Section: Applications Of Nanocellulose Aerogelsmentioning

confidence: 99%

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

et al. 2021

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“…Although densely packed MXene can exhibit a high EMI SE at a low thickness [20][21][22][23][24][25], dense MXene films may not satisfy the requirements of flexibility and low density owing to the weak interlayer interactions between MXene nanosheets [26,27]. Combining carbon nanomaterials with MXene is a promising strategy for balancing the mechanical properties and SE [1,9,[28][29][30]. Recently, A reported flexible CNT/ MXene/cellulose nanofibril hybrid film exhibited a high conductivity of 2506.6 S m −1 and an SE of 38.4 dB in the X-band at a thickness of 38 μm [31].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin, Lightweight, and Flexible CNT Buckypaper Enhanced Using MXenes for Electromagnetic Interference Shielding

et al. 2021

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Lightweight, flexibility, and low thickness are urgent requirements for next-generation high-performance electromagnetic interference (EMI) shielding materials for catering to the demand for smart and wearable electronic devices. Although several efforts have focused on constructing porous and flexible conductive films or aerogels, few studies have achieved a balance in terms of density, thickness, flexibility, and EMI shielding effectiveness (SE). Herein, an ultrathin, lightweight, and flexible carbon nanotube (CNT) buckypaper enhanced using MXenes (Ti3C2Tx) for high-performance EMI shielding is synthesized through a facile electrophoretic deposition process. The obtained Ti3C2Tx@CNT hybrid buckypaper exhibits an outstanding EMI SE of 60.5 dB in the X-band at 100 μm. The hybrid buckypaper with an MXene content of 49.4 wt% exhibits an EMI SE of 50.4 dB in the X-band with a thickness of only 15 μm, which is 105% higher than that of pristine CNT buckypaper. Furthermore, an average specific SE value of 5.7 × 104 dB cm2 g−1 is exhibited in the 5-μm hybrid buckypaper. Thus, this assembly process proves promising for the construction of ultrathin, flexible, and high-performance EMI shielding films for application in electronic devices and wireless communications.

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“…In recent years, development of efficient electromagnetic (EM) wave absorbing materials to eliminate excessive EM wave interfere has caused great research attention. [1][2][3][4][5][6][7][8][9] Co-based spinel structured metal oxides are regarded as prospective candidates as effective EM wave absorbing materials. To date, a series of DOI: 10.1002/advs.202004640 MCo 2 O 4 (M = Fe, Ni, Mn, etc.)…”

Section: Introductionmentioning

confidence: 99%

Defect Induced Polarization Loss in Multi‐Shelled Spinel Hollow Spheres for Electromagnetic Wave Absorption Application

2021

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Defect engineering is an effective approach to manipulate electromagnetic (EM) parameters and enhance absorption ability, but defect induced dielectric loss dominant mechanism has not been completely clarified. Here the defect induced dielectric loss dominant mechanism in virtue of multi-shelled spinel hollow sphere for the first time is demonstrated. The unique but identical morphology design as well as suitable composition modulation for serial spinels can exclude the disturbance of EM wave dissipation from dipolar/interfacial polarization and conduction loss. In temperature-regulated defect in NiCo 2 O 4 serial materials, two kinds of defects, defect in spinel structure and oxygen vacancy are detected. Defect in spinel structure played more profound role on determining materials' EM wave dissipation than that of oxygen vacancy. When evaluated serial Co-based materials as absorbers, defect induced polarization loss is responsible for the superior absorption performance of NiCo 2 O 4 -based material due to its more defect sites in spinel structure. It is discovered that electron spin resonance test may be adopted as a novel approach to directly probe EM wave absorption capacities of materials. This work not only provides a strategy to prepare lightweight, efficient EM wave absorber but also illustrates the importance of defect engineering on regulation of materials' dielectric loss capacity.

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Nanocellulose‐MXene Biomimetic Aerogels with Orientation‐Tunable Electromagnetic Interference Shielding Performance

Cited by 345 publications

References 59 publications

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

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

Ultrathin, Lightweight, and Flexible CNT Buckypaper Enhanced Using MXenes for Electromagnetic Interference Shielding

Defect Induced Polarization Loss in Multi‐Shelled Spinel Hollow Spheres for Electromagnetic Wave Absorption Application

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