BNNT/SWCNT/PDMS Composites for Dual Electromagnetic Interference and Neutron Shielding

Abstract A lightweight and thin material that could simultaneously attenuate both electromagnetic interference (EMI) and neutron radiation is urgently required for advanced electronic and aerospace applications. In this study, we report a composite comprising BNNT/SWCNT/PDMS to achieve synergistic EMI and neutron-shielding performance. Resulting in excellent EMI shielding effectiveness, reaching approximately 45 dB at a BNNT: SWCNT ratio of 1:9, while maintaining appreciable performance even at low SWCNT content. In addition, the composite exhibits a neutron attenuation coefficient of 0.282 mm-1. Furthermore, structural characterization confirmed the effective integration of boron nitride nanotubes (BNNTs) and single-walled carbon nanotubes (SWCNTs), with enhanced interlayer stacking observed in the hybrid system. These results present a lightweight and multi-shielding composite for next-generation shielding material.