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Shear‐Rheological‐Assisted MXene Dispersion in Epoxy Resin for Efficient Electromagnetic Absorption.

Authors :
Liu, Zonglin
Zhao, Xu
Xue, Fuhua
Xu, Liangliang
Chen, He
Chen, Zhong
Yan, Qian
Xiong, Jinhua
Zheng, Haowen
Li, Pengyang
Lian, Huanxin
Chen, Yunxiang
Peng, Qingyu
He, Xiaodong
Source :
Advanced Functional Materials. Jul2024, p1. 10p. 6 Illustrations.
Publication Year :
2024

Abstract

MXenes, a burgeoning family of 2D materials with high conductivity and large specific surface area, are ideal electromagnetic absorbing materials. However, the ample polar functional groups lead to poor dispersion in the non‐polar matrix, limiting its application in non‐polar‐polymer‐based composites. With the help of the shear rheological properties of SiO2, the conflict is resolved here by directly dispersing MXene aqueous dispersion into the non‐polar resin. Water is locked dynamically through SiO2 nanoparticles among the MXene@SiO2 nanosheets, suppressing MXene's self‐restacking and aggregation in the resin matrix. Therefore, the fabrication of uniform MXene/non‐polar polymer composites is achieved. Meanwhile, this method allows different nanoparticles (Fe3O4, etc.) to be evenly dispersed among the MXene nanosheets to further improve the composites' electromagnetic parameters. The as‐prepared composites achieve remarkable absorbing performance with a low MXene concentration (≤5 wt.‰). The SMEP‐h achieves the maximum reflection loss value of over 60 dB at 12 GHz (at the thickness of 2.15 mm), and the SMEP‐F possesses a broad effective absorbing bandwidth of over 6.18 GHz (at the thickness of 1.75 mm). The shear‐rheological‐assisted MXene dispersion method in the non‐polar matrix paves an avenue for the design of outstanding MXene‐based electromagnetic absorbing composites. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1616301X
Database :
Academic Search Index
Journal :
Advanced Functional Materials
Publication Type :
Academic Journal
Accession number :
178520688
Full Text :
https://doi.org/10.1002/adfm.202409069