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Multifunctional Ti3C2T MXene Composite Hydrogels with Strain Sensitivity toward Absorption-Dominated
Yunyi Zhu1, Ji Liu1,2,3, Tong Guo4
1College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China.
ACS Nano
|January 5, 2021
Summary
A novel MXene-based hydrogel offers superior electromagnetic interference (EMI) shielding with high absorption and recyclability. This advanced material provides a flexible, thin, and eco-friendly solution for next-generation shielding applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetics
Background:
- Terahertz technologies require advanced electromagnetic interference (EMI) shielding materials.
- Conventional shielding materials suffer from high reflectivity, poor recyclability, and secondary pollution.
- There is a need for adaptable, eco-friendly, and high-performance EMI shielding solutions.
Purpose of the Study:
- To develop a novel hydrogel-based EMI shielding material.
- To investigate the EMI shielding performance and properties of MXene-poly(acrylic acid) composites.
- To explore the potential of this material as an on-skin sensor.
Main Methods:
- Fabrication of a composite hydrogel using MXene and poly(acrylic acid) via a biomineralization-inspired assembly route.
- Characterization of the hydrogel's mechanical properties (stretchability, self-healing), shape adaptability, and adhesiveness.
- Evaluation of EMI shielding efficiency (SE), reflection loss, and absorption bandwidth in the terahertz range.
Main Results:
- The composite hydrogel exhibited excellent stretchability, recyclability, shape adaptability, and self-healing capabilities.
- Achieved high EMI shielding efficiency of 45.3 dB with an absorption-dominated mechanism.
- Demonstrated a broad effective absorption bandwidth from 0.2 to 2.0 THz with low reflection loss (23.2 dB) in an ultra-thin film (0.13 mm).
- The hydrogel showed sensitive deformation responses, enabling its use as an on-skin sensor.
Conclusions:
- The developed MXene-based hydrogel is a promising next-generation EMI shielding material with superior performance and eco-friendly attributes.
- The material's unique properties offer flexibility, reliability, and adaptability for various applications.
- This work presents an efficient method for fabricating macroscopic MXene composites and highlights their potential beyond EMI shielding, including sensing.
