Asymmetric and mechanically enhanced MOF derived magnetic carbon-MXene/cellulose nanofiber films for electromagnetic interference shielding and electrothermal/photothermal conversion

Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 155707 - 155707

Опубликована: Сен. 11, 2024

Язык: Английский

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Cellulose Nanofiber-Based Nanocomposite Films with Efficient Electromagnetic Interference Shielding and Fire-Resistant Performance

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(32), С. 42674 - 42686

Опубликована: Авг. 1, 2024

Cellulose nanofiber (CNF) has been widely used as a flexible and lightweight polymer matrix for electromagnetic shielding thermally conductive composite films because of its excellent mechanical strength, environmental performance, low cost. However, the lack flame retardancy seriously hinders further application. Herein, renewable biomass-sourced l-arginine (AR) was to surface-modify ammonium polyphosphate (APP) an environmentally friendly biobased retardant synthesized by coordination zinc sulfate heptahydrate (ZnSO4·7H2O), which named AAZ. AAZ deposited on surface CNF electrostatic adsorption Zn2+ complexation. The compatibilizer Triton X-100 employed assist exfoliation graphene nanoplatelets (GNPs) their dispersion in matrix. Due formation dense lamellar layer resembling shell structure, CNF/GNPs with tensile strength 52 MPa were obtained via vacuum-assisted filtration. Because phosphorus-containing group produces protective PxOy compound promotes carbon combustion releases ammonia gas, fire-resistant performance greatly improved. Compared pure film, film exhibits 33% reduction PHRR value 40% THR. In addition, 20 wt % GNPs possessed high conductivity (2079.2 S/m) interference (EMI) effectiveness (37 dB). ultrathin have potential use efficient EMI materials.

Язык: Английский

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3D printed PEEK/CF nanocomposites metamaterial for enhanced resonances toward microwave absorption and compatible camouflage

Materials Today Nano, Год журнала: 2024, Номер 28, С. 100530 - 100530

Опубликована: Окт. 9, 2024

Язык: Английский

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Lightweight and Mechanically Strong MXene-Based Microcellular Nanocomposite Foams for Integrated Electromagnetic Interference Shielding and Thermal Management

Composites Science and Technology, Год журнала: 2024, Номер unknown, С. 110988 - 110988

Опубликована: Ноя. 1, 2024

Язык: Английский

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Flexible and Lightweight Nanocomposite Film with a Cocoa-tree-like Structure for Electromagnetic Interference Shielding, Strain Sensing, and Thermal Management

ACS Applied Nano Materials, Год журнала: 2025, Номер 8(4), С. 1912 - 1924

Опубликована: Янв. 21, 2025

Modern intelligent electronic devices require electromagnetic interference (EMI) shielding composite films with outstanding effectiveness and multifunctionality to adapt increasingly complex application environments. In this work, inspired by the morphology of cocoa trees, SiO2 is conceived as fruit one-dimensional nanomaterial silver nanowires (AgNWs) branches. Utilizing metal chelating properties polydopamine (PDA), SiO2@PDA@AgNWs were formed subsequently interwoven cellulose nanofibers (CNFs) create a nanocomposite film cocoa-tree-like structure, denoted CNFs-AgNWs-SiO2@PDA (C-A-SP). Conductive AgNWs induce conductivity losses, while contribute multiple scattering interfacial polarization losses. Therefore, C-A-SP thickness 59 μm demonstrates an impressive EMI (EMI SE) 76.91 dB exhibits specific SE (SSE/t) 15304.88 dB·cm2·g–1. Meanwhile, thermal conductivities in-plane out-plane reached 4.15 0.15 W/(m·K), respectively. Additionally, also excellent strain-sensing capability. This study provides valuable insights for designing fabricating lightweight, flexible, multifunctional efficient composites.

Язык: Английский

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Ag-doped PDA interface strategy for selective electron transition integrating EMI shielding and anti-corrosion performance

Journal of Material Science and Technology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 1, 2024

Язык: Английский

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Schottky Interface Engineering in Ti₃C₂T_x/ZnS Organic Hydrogels for High‐Performance Multifunctional Flexible Absorbers

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 17, 2024

Abstract With the rapid advancement of wearable electronics, soft robotics, and camouflage technologies, there is an urgent demand for flexible, multifunctional electromagnetic wave absorbing materials. Traditional absorbers, including metal‐ carbon‐based materials, often lack flexibility required such applications. In this work, a novel strategy proposed developing flexible absorber by combining conductive filler with Schottky heterogeneous interface polymer network framework. Ti 3 C 2 T x MXene modified ZnS via low‐temperature hydrothermal method, forming /ZnS composite. This composite subsequently embedded in copolymer matrix polyvinyl alcohol (PVA) acrylamide (AAm), dispersed binary water‐glycerol solution. The between enhances electron transfer at heterophase boundary, significantly improving polarisation. Simultaneously, interactions water glycerol restrict rotation polar molecules under external fields, optimising polarisation loss within gel. Experimental results demonstrate that gel achieves minimum reflection (RL min ) −43.76 dB 8.79 GHz, effective absorption bandwidth (EAB) covering entire X‐band. Additionally, exhibit exceptional stretchability, frost resistance, shape adaptability, photothermal conversion properties.

Язык: Английский

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All-in-One layer-structured multi-functional conductive polypyrrole coated polyimide aerogel

Composites Part B Engineering, Год журнала: 2025, Номер 295, С. 112201 - 112201

Опубликована: Янв. 31, 2025

Язык: Английский

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Facile fabrication of a multi-functional bifacial membrane with simultaneously enhanced electromagnetic interference shielding and infrared stealth performance

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер unknown, С. 136403 - 136403

Опубликована: Фев. 1, 2025

Язык: Английский

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Nano- and Microscale Design of Electrically Conductive Bacterial Cellulose/PEDOT Cryogels for Electromagnetic Interference Shielding

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Фев. 18, 2025

Exploiting conductive biobased polymer nanocomposites for electromagnetic interference (EMI) shielding is a rapidly evolving research area. In this study, we systematically fine-tune the nano- and microstructural features of bacterial cellulose (BC) modified with poly(3,4-ethylenedioxythiophene) (PEDOT) EMI applications. First, to investigate effect nanostructure, PEDOT incorporated into BC matrix using two methods: chemical vapor polymerization (CVP) in situ polymerization. The CVP method produces more uniform denser BC-PEDOT nanocomposites, resulting cryogels higher electrical conductivity total effectiveness (SET) (52 ± 2 S/m, 37 dB) compared those polymerized (7 1.5 27 dB). cryogels' microstructure then adjusted control mechanisms by applying different drying freeze-drying, air-drying, hybrid freeze- air-drying. Our results indicate that energy-efficient air-drying enhances reflection-dominant mechanism, slight increase effectiveness. conditions also affect final mechanical properties samples. Overall, study demonstrates are excellent candidates

Язык: Английский

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