Construction of cellulose nanofiber-Ti3C2Tx MXene/silver nanowire nanocomposite papers with gradient structure for efficient electromagnetic interference shielding

Zhao, Yao; Miao, Baoji; Nawaz, Muhammad Asif; Zhu, Qingsong; Chen, Qiuling; Reina, Tomas Ramirez; Bai, Jinbo; He, Delong; Al-Tahan, Mohammed A.; Arsalan, Muhammad

doi:10.1007/s42114-024-00839-0

Cited by 14 publications

(1 citation statement)

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“…On the other hand, the optimization of polymer binders by improving compatibility with MXene is also effective in achieving the highly oriented and dense stacking in layered structures. By virtue of their outstanding compatibility with MXene, water-soluble polymers (e.g., poly(vinyl alcohol) PVA, − cellulose nanofibers CNF, , CNC, etc.) have been widely used as matrix materials.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine Aramid Nanofiber-Assisted Large-Area Dense Stacking of MXene Films for Electromagnetic Interference Shielding and Multisource Thermal Conversion

Liu,

Jiang,

Shen

et al. 2024

ACS Appl. Mater. Interfaces

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Polymers are often used as adhesives to improve the mechanical properties of flexible electromagnetic interference (EMI) shielding layered films, but the introduction of these insulating adhesives inevitably reduces the EMI performance. Herein, ultrafine aramid nanofibers (UANF) with a diameter of only 2.44 nm were used as the binder to effectively infiltrate and minimize the insulating gaps in MXene films, for balancing the EMI shielding and mechanical properties. Combining the evaporation-induced scalable assembly assisted by blade coating, flexible large-scale MXene/UANF films with highly aligned and compact MXene stacking are successfully fabricated. Compared with the conventional ANF with a larger diameter of 7.05 nm, the UANF-reinforced MXene film exhibits a “brick-mortar” structure with higher orientation and compacter stacking MXene nanosheets, thus showing the higher mechanical properties, electrical conductivity, and EMI shielding performance. By optimizing MXene content, the MXene/UANF film can achieve the optimal tensile strength of 156.9 MPa, a toughness of 2.9 MJ m−3, satisfactory EMI shielding effectiveness (EMI SE) of 40.7 dB, and specific EMI SE (SSE/t) of 22782.4 dB cm2/g). Moreover, the composite film exhibits multisource thermal conversion functions including Joule heating and photothermal conversion. Therefore, the multifunctional MXene/UANF EMI shielding film with flexibility, foldability, and robust mechanical properties shows the practical potential in complex application environments.

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