Ultrathin-flexible multifunctional MXene composite hydrogels with good mechanical properties-high strain sensitivity and ultra-broadband EMI shielding performances

Ouyang, Wenchong; Mei, Lin; Liu, Qi; Ding, Chengbiao; Liu, Yanming; Zhao, Chengwei; Xu, Limin; Lu, Fu; Luo, Dongpeng; Miao, Chunguang; Bai, Yu; Lu, Quanming; Luo, Tianzhi; Wu, Zhengwei

doi:10.1016/j.cej.2024.153068

Chemical Engineering Journal

2024

DOI: 10.1016/j.cej.2024.153068

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Ultrathin-flexible multifunctional MXene composite hydrogels with good mechanical properties-high strain sensitivity and ultra-broadband EMI shielding performances

Wenchong Ouyang,

Lin Mei,

Qi Liu

et al.

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Cited by 6 publications

References 48 publications

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

Fang,

Huang,

Cui

et al. 2024

Adv Funct Materials

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

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

Fang,

Huang,

Cui

et al. 2024

Adv Funct Materials

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Emerging Applications of Smart Hydrogel Nanocomposites in 3D Printing

Heidari,

Shahi,

Afshar

et al. 2024

Polymers for Advanced Techs

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This review provides a comprehensive overview of the emerging applications of stimuli‐responsive hydrogels in 3D printing, emphasizing their transformative potential in creating adaptive and multifunctional structures. Stimuli‐responsive hydrogels, including magneto‐, thermo‐, pH‐, moisture‐, solvent‐, and photo‐responsive varieties, have gained significant attention due to their ability to undergo dynamic changes in response to specific environmental stimuli. The review begins by exploring the fundamental characteristics and fabrication methods of hydrogels used in additive manufacturing, highlighting their exceptional adaptability and programmability. It then delves into various applications across diverse fields, including soft robotics, tissue engineering, drug delivery systems, wearable electronics, food technology, electromagnetic interference shielding, and anti‐counterfeiting technologies. By integrating the latest advancements in 3D printing techniques, this review aims to offer insights into how stimuli‐responsive hydrogels are enabling the development of innovative, intelligent, and environmentally responsive systems. The future perspectives section discusses challenges and opportunities for advancing the use of hydrogels in 3D printing, suggesting directions for future research that could push the boundaries of functional materials and programmable structures.

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Highly Stretchable, Transparent Hydrogel for Electromagnetic Interference Shielding

Lian,

Wang,

Liu

et al. 2024

Small Structures

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The demand for transparent electromagnetic interference (EMI) shielding materials has intensified, driven by the shortcomings of conventional transparent shielding materials, which exhibit limited light transmittance properties and struggle to perform effectively in complex environments. Herein, a conductive, stretchable, and adaptable P(AM‐co‐AA) hydrogel is developed by cross‐linking acrylamide (AM) with acrylic acid (AA). The hydrophilic groups contained in AA and AM endow the hydrogels a light transmission of over 80%. The introduction of carboxyl group and acyl amino group provides a good hydrogen bonding environment, and the rich polymer network structure formed by appropriate monomer ratio is more conducive to the mechanical properties and EMI shielding properties of hydrogels. The P(AM‐co‐AA) hydrogel demonstrates favorable mechanical properties, boasting a maximum strain at break of 1322%. Additionally, the EMI shielding performance of the hydrogel is as high as 37 dB. Even when subjected to external forces, the hydrogel maintains a total shielding effectiveness of 20 dB at a strain level of 150%. In this work, ideas are provided to prepare stretchable and transparent hydrogel with excellent EMI performance for complex application environment.

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Ultrathin-flexible multifunctional MXene composite hydrogels with good mechanical properties-high strain sensitivity and ultra-broadband EMI shielding performances

Cited by 6 publications

References 48 publications

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

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

Emerging Applications of Smart Hydrogel Nanocomposites in 3D Printing

Highly Stretchable, Transparent Hydrogel for Electromagnetic Interference Shielding

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