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Transparent and Corrosion-Resistant PDMS/ITO/Ag/ITO Multilayer Film for Efficient EMI Shielding in a Marine
Xinhua Yang1, Dingyu Shi1, Lechun Deng1
1State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shanxi 710072, China.
Abstract:
The issue of increased electromagnetic pollution has sparked widespread demands for electromagnetic interference (EMI) shielding technology in specialized applications such as optical windows and periscopes. More importantly, the materials maintaining a high transmittance and excellent EMI shielding stability in harsh environments still remain an urgent challenge. In this work, a multilayered PDMS/ITO/Ag/ITO (PIAI) film is constructed by magnetron sputtering and spin-coating techniques. The PIAI film with a sandwiched structure design exhibited an efficient shielding effectiveness of 35 dB in the X-band while boasting an impressive transmittance of 89% at 550 nm ascribed to refractive index matching of the PDMS layer and phase cancellation interference between ITO layers. It also represented satisfying corrosion resistance and chemical stability, with a slight shielding effectiveness decrease of 5% after immersing for 24 h in 5 wt % NaCl solution. Therefore, the as-obtained multilayered film integrates the multifunctionality of efficient EMI shielding, high light transmission, and excellent corrosion resistance, offering a promising avenue for transparent EMI shielding films applied to visible windows in a harsh environment.
