POS5-0978
Fe3O4-Functionalized Ni Aerogel/Polymer Composites for Absorption-Enhanced Electromagnetic Interference Shielding Applications
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Hyunju Park (Gwangju Institute of Science and Technology)
Co-Author(s)
Abstract
Electromagnetic interference (EMI) shielding materials are critical to the reliable operation of electronic devices, wearable systems, soft robotics, and sensor platforms. However, conventional polymer-based shielding composites generally require high filler loadings, while the random distribution of fillers limits the formation of effective conductive networks and the rational control of shielding mechanisms. In this work, Ni aerogel/polymer composites are investigated as three-dimensional conductive frameworks for EMI shielding. Porous Ni aerogel networks were constructed via magnetic-field-assisted synthesis and subsequently processed to modulate their network density and structural stability. The resulting Ni aerogel framework offers continuous conductive pathways and abundant interfaces for multiple internal reflections. Furthermore, the incorporation of Fe3O4 nanoparticles was explored to introduce additional magnetic loss and interfacial polarization. The dense Ni aerogel framework was stabilized with a polymer matrix, yielding a mechanically resilient conductive aerogel/polymer composite. The enhanced shielding effectiveness is expected to arise from the combined effects of the densified conductive Ni network, multiple internal reflections within the porous framework, and Fe3O4-assisted magnetic loss and interfacial polarization. This study provides a structural design strategy for lightweight, mechanically resilient, and absorption-enhanced polymer-based EMI shielding composites.
