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3D-Printed Gradient-Porous MXene@mRGO@SiO2 Microspheres/SiC Hybrid Elastomer for Broadband Electromagnetic Wave
Mingwei Yang1,2, Junrui Tan1,2, Eun-Seong Kim3,4
1State Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Small Methods
|December 3, 2025
Summary
Researchers developed a 3D printable elastomer using novel microspheres for advanced electromagnetic wave absorption. This material offers superior performance and mechanical properties for flexible electronics.
Area of Science:
- Materials Science
- Electromagnetics
- Additive Manufacturing
Background:
- Direct ink writing (DIW) allows precise 3D printing of electromagnetic wave absorption elastomers (EMWAEs).
- Developing printable inks with combined electromagnetic and mechanical properties is challenging.
- Existing EMWAEs often struggle with printability and performance trade-offs.
Purpose of the Study:
- To present a scalable fabrication strategy for high-performance EMWAEs using 3D printing.
- To enhance the printability and electromagnetic absorption capabilities of silicone elastomers.
- To create multifunctional materials for flexible and wearable electronic applications.
Main Methods:
- Synthesized MXene@modified-RGO@SiO2 microspheres via continuous spheroidization.
- Incorporated SiO2 nanoparticles to improve microsphere dispersion and rheological properties for DIW.
- Designed and 3D printed three-layer gradient-porous structures based on electromagnetic simulations.
Main Results:
- Achieved excellent printability and stable DIW extrusion of the elastomer ink.
- Demonstrated a minimum reflection loss (RLmin) of -44 dB and an effective absorption bandwidth of 7.2 GHz at 3 mm thickness.
- Observed enhanced thermal conductivity and tensile strength in the printed elastomers.
Conclusions:
- The developed MXene@modified-RGO@SiO2 microsphere-based elastomer is a promising material for 3D-printed EMWAEs.
- The gradient-porous structure design effectively maximizes electromagnetic absorption.
- This approach offers a versatile platform for next-generation tunable, robust, and high-performance EMWAEs.
