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Published on: February 20, 2019
MXene/Polylactic Acid Fabric-Based Resonant Cavity for Realizing Simultaneous High-Performance Electromagnetic
Ziran Du1, Gaoyan Zhang1, Kun Chen1
1Key Laboratory of Materials Processing & Mold (Zhengzhou University), Ministry of Education; National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450000, China.
A novel double-layered MXene/polylactic acid fabric resonance cavity (D-MPF-RC) offers superior electromagnetic interference (EMI) shielding and self-powered capabilities. This material efficiently converts mechanical energy into electricity, enabling self-powered electronic devices.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetics
Background:
- Growing demand for electromagnetic interference (EMI) shielding in telecommunications and intelligent devices.
- Need for versatile EMI shielding materials with integrated self-powered functionalities.
Purpose of the Study:
- To develop a novel double-layered MXene/polylactic acid fabric resonance cavity (D-MPF-RC) for enhanced EMI shielding.
- To integrate self-powered capabilities into the EMI shielding material using triboelectric nanogenerator (TENG) principles.
Main Methods:
- Fabrication of a double-layered structure using MXene/polylactic acid (PLA) fabrics separated by a poly(tetrafluoroethylene) (PTFE) frame.
- Characterization of EMI shielding performance (SET, SEA, SER) and optimization of resonance cavity (RC) distance.
- Evaluation of the material's triboelectric nanogenerator (TENG) performance for energy harvesting.
Main Results:
- Achieved significant improvements in total (SET) and aperture (SEA) shielding effectiveness, and a reduction in reflected shielding effectiveness (SER).
- Obtained a high shielding efficiency (SE) of 92.3 dB at a 6 mm RC distance due to synergistic effects.
- Demonstrated effective energy harvesting with an open-circuit voltage of 88 V and a peak power density of 35.4 mW m-2, enabling capacitor charging and tactile sensing.
Conclusions:
- The D-MPF-RC design enhances EMI shielding performance and integrates self-powered capabilities.
- The material's tribopolarity and RC structure facilitate efficient triboelectric energy generation.
- This work presents a promising pathway for developing advanced, self-powered EMI shielding solutions.
