Phase‐Transition Microcapacitor Network in Organohydrogel for Absorption‐Dominated Electromagnetic Interference Shielding and Multi‐Mode Intelligent Responsiveness

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 8, 2024

Abstract Hydrogels/organohydrogels show promise for flexible, intelligent electromagnetic interference (EMI) shielding, yet simultaneously achieving absorption‐dominated shielding performance, excellent mechanical properties and multi‐mode responsiveness remains challenging. This study presents a microcapacitor network strategy as an alternative to the traditional conductive percolation EMI materials. Paraffin‐nanoclay/MXene core‐shell microspheres are uniformly integrated into hydrogel matrix via in situ polymerization, forming where microsphere shells serve capacitor plates dielectric layers, respectively. Microcurrents interfacial polarization at plates, along with dipole within layer, significantly promote EM wave attenuation (absorption coefficient >0.7). Meanwhile, abundant hydrogen bonds paraffin phase synergistically enhance strength (≈0.64 MPa) stretchability (elongation break > 1000%). Due solid‐liquid transition of microspheres, organohydrogel exhibits unique ability retain high‐temperature performance room temperature. feature enhances room‐temperature effectiveness enables responsiveness. Under same deformation mode, it programmable regulation response different external stimuli, following changes or simulating changes.

Language: Английский

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Multi-Functional Electromagnetic Wave Absorption Hydrogel with Adjustable Absorption Frequency

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120238 - 120238

Published: March 1, 2025

Language: Английский

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SGs‐CNTs/PAM/CCS Triple Network Hydrogel: Neural Architecture Inspired for Broadband EMI Shielding and Environmental Resilience

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 5, 2025

Abstract Improving traditional multi‐network hydrogels by introducing a low‐density rigid filler network to optimize single ionic conductivity and overcome the limited electromagnetic properties produce interference (EMI) shielding is pioneering challenge. Drawing inspiration from neural network, this research introduces novel triple‐network (TN) hydrogel. The single‐layer graphenes (SGs) carbon nanotubes (CNTs) mimic conductive channels similar neurons axons/dendrites, respectively, assist dispersion‐lap‐fixation process of carboxymethyl chitosan (CCS) polyacrylamide (PAM). This collaborative assembly SGs‐CNTs, coupled with presence water molecules, imparts SGs‐CNTs/CCS/PAM (SCCP) hydrogel exceptional EMI effectiveness (SE) across 8.2–26.5 GHz range (X, Ku, K bands), reaching SE 42.31, 50.20, 60.78 dB, respectively. Moreover, photothermal SGs‐CNTs enable CCS/PAM heal sections efficiently recover when exposed near‐infrared (NIR) light. SCCP also boasts significant depression freezing point −43 °C, achieved through hydration LiCl. Boasting diversified manufacturing, self‐healing properties, environmental durability, stands out as an ideal candidate for shows excellent potential multifunctional applications in flexible electronics.

Language: Английский

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MXene Triggered Double Conductive Mechanism Hydrogels for Strain Sensing with Electromagnetic Interference Shielding Performance

Composites Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 111210 - 111210

Published: April 1, 2025

Language: Английский

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Self-Healing Liquid Metal Magnetic Composite Films for Wearable Sensors and Electromagnetic Shielding

ACS Applied Engineering Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Language: Английский

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