A Bioinspired Gradient Design Strategy for Cellulose-Based Electromagnetic Wave Absorbing Structural Materials

Liu, Zhao-Xiang; Yang, Huai-Bin; Han, Zi-Meng; Sun, Wen-Bin; Ge, Xing-Xiang; Huang, Jun-Ming; Yang, Kun-Peng; Li, De-Han; Guan, Qing-Fang; Yu, Shu-Hong

doi:10.1021/acs.nanolett.3c03989

Cited by 16 publications

(1 citation statement)

References 46 publications

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“…The potential for practical engineering applications of single MAM is somewhat limited by inherent constraints. Numerous materials with unique structures exhibit MA properties surpassing those of natural materials, especially EAB [ 24 – 26 ]. The honeycomb structure has gained prominence in current research due to its lightweight and high-strength characteristics [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Designing Symmetric Gradient Honeycomb Structures with Carbon-Coated Iron-Based Composites for High-Efficiency Microwave Absorption

Zhang,

Yang,

Xin

et al. 2024

Nano-Micro Lett.

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The impedance matching of absorbers is a vital factor affecting their microwave absorption (MA) properties. In this work, we controllably synthesized Material of Institute Lavoisier 88C (MIL-88C) with varying aspect ratios (AR) as a precursor by regulating oil bath conditions, followed by one-step thermal decomposition to obtain carbon-coated iron-based composites. Modifying the precursor MIL-88C (Fe) preparation conditions, such as the molar ratio between metal ions and organic ligands (M/O), oil bath temperature, and oil bath time, influenced the phases, graphitization degree, and AR of the derivatives, enabling low filler loading, achieving well-matched impedance, and ensuring outstanding MA properties. The MOF-derivatives 2 (MD2)/polyvinylidene Difluoride (PVDF), MD3/PVDF, and MD4/PVDF absorbers all exhibited excellent MA properties with optimal filler loadings below 20 wt% and as low as 5 wt%. The MD2/PVDF (5 wt%) achieved a maximum effective absorption bandwidth (EAB) of 5.52 GHz (1.90 mm). The MD3/PVDF (10 wt%) possessed a minimum reflection loss (RLmin) value of − 67.4 at 12.56 GHz (2.13 mm). A symmetric gradient honeycomb structure (SGHS) was constructed utilizing the high-frequency structure simulator (HFSS) to further extend the EAB, achieving an EAB of 14.6 GHz and a RLmin of − 59.0 dB. This research offers a viable inspiration to creating structures or materials with high-efficiency MA properties.

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Section: Introductionmentioning

confidence: 99%

Designing Symmetric Gradient Honeycomb Structures with Carbon-Coated Iron-Based Composites for High-Efficiency Microwave Absorption

Zhang,

Yang,

Xin

et al. 2024

Nano-Micro Lett.

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Single‐Atom Nanozyme‐Like Lanthanum Moieties for High‐Performance Electromagnetic Energy Absorption

Shi,

Ma,

Zhang

et al. 2024

Adv Funct Materials

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Single‐atom (SA) nanozymes have unprecedented physicochemical performance due to their integrated merits of both atomically dispersed metal atoms and bio‐enzymes. However, the structure‐function relationship between the SA nanozyme‐like structure and its dielectric performance is still unclear. Furthermore, controllable synthesis of SA nanozyme‐like structures remains challenging due to their unique five‐coordinated configurations. Here, a dicyandiamide‐mediated pyrolysis strategy is proposed to anchor five nitrogen‐coordinated lanthanum (La)–N5 moieties on interconnected N‐doped graphene nanocages (La‐N5/ING). Theoretical predictions indicate that the spatially coordinated La–N5 moieties exhibit significantly enhanced conduction loss and polarization loss compared to La–N4 moieties, as evidenced by the experimental results. Moreover, the polydimethylsiloxane‐coated chemically cross‐linked film constructed by the La‐N5/ING and aramid nanofibers has outstanding electromagnetic wave (EMW) absorption performance with an effective absorption bandwidth (EAB10) of 6.24 GHz at a thickness of merely 2.0 mm, outperforming those of most reported carbon‐based films. Importantly, the film also has excellent flexibility, hydrophobicity, mechanical strength, and structural stability, ensuring its application potential in practical environments. These findings provide crucial insights into the microscopic environment of SA on the dielectric properties of their host materials, and a critical method for the preparation of multifunctional films with spatial coordinated SA.

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Emerging Sustainable Structural Materials by Assembling Cellulose Nanofibers

Yang,

Yue,

Liu

et al. 2024

Advanced Materials

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Under the guidance of the carbon peaking and carbon neutrality goals, the urgency for green ecological construction and the depletion of nonrenewable resources highlight the importance of the research and development of sustainable new materials. Cellulose nanofiber (CNF) is the most abundant natural nanoscale building block widely existing on Earth. CNF has unique intrinsic physical properties, such as low density, low coefficient of thermal expansion, high strength, and high modulus, which is an ideal candidate with outstanding potential for constructing sustainable materials. In recent years, CNF‐based structural material has emerged as a sustainable lightweight material with properties very different from traditional structural materials. Here, to comprehensively introduce the assembly of structural materials based on CNF, it starts with an overview of different forms of CNF‐based materials, including fibers, films, hydrogels, aerogels, and structural materials. Next, the challenges that need to be overcome in preparing CNF‐based structural materials are discussed, their assembly methods are introduced, and an in‐depth analysis of the advantages of the CNF‐based hydrogel assembly strategy to fabricate structural materials is conducted. Finally, the unique properties of emerging CNF‐based structural materials are summarized and concluded with an outlook on their design and functionalization, potentially paving the way toward new opportunities.

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A Bioinspired Gradient Design Strategy for Cellulose-Based Electromagnetic Wave Absorbing Structural Materials

Cited by 16 publications

References 46 publications

Designing Symmetric Gradient Honeycomb Structures with Carbon-Coated Iron-Based Composites for High-Efficiency Microwave Absorption

Designing Symmetric Gradient Honeycomb Structures with Carbon-Coated Iron-Based Composites for High-Efficiency Microwave Absorption

Single‐Atom Nanozyme‐Like Lanthanum Moieties for High‐Performance Electromagnetic Energy Absorption

Emerging Sustainable Structural Materials by Assembling Cellulose Nanofibers

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