With the popularization of 5G technology, the problem of electromagnetic interference (EMI) has become increasingly prominent. Through filler modification and structural design, silicone rubber has become an ideal choice for flexible electromagnetic shielding materials.

1. Synergistic Enhancement of Conductive Fillers

Adopting a composite filler system of "metal nanowires + carbon nanotubes" to construct a three-dimensional conductive network in silicone rubber. When the total filler content is 15 wt%, the electromagnetic shielding effectiveness (SE) of the composite material can reach 50 dB, while maintaining an elongation at break of 300%. This material has been applied to the shielding layer of flexible circuit boards, effectively suppressing high-frequency signal interference.

2. Design of Frequency-selective Shielding

By controlling the shape and arrangement direction of the fillers, the shielding effect for specific frequency bands can be achieved. For example, arranging graphene sheets perpendicular to the electric field direction can achieve an SE of 45 dB in the X-band (8-12 GHz), while remaining transparent to signals in other frequency bands. This frequency-selective silicone rubber can be used for the electromagnetic shielding function of smart windows.

3. Transparent Electromagnetic Shielding Materials

Using a composite coating technology of silver nanowires/polydopamine to prepare a transparent conductive film on the surface of silicone rubber. When the content of silver nanowires is 0.3 wt%, the light transmittance reaches 85%, and the SE is 30 dB, making it suitable for the electromagnetic protection of flexible display devices.


General Purpose Fumed Extrusion Silicone Rubber