Nickel-containing nanocomposite film materials on a hydrogel matrix and a fabrication process for these materials to shield against electromagnetic interference.

Abstract

The invention relates to a nickel-containing nanocomposite film material on a hydrogel matrix and a process for fabricating this material for electromagnetic interference shielding. The process includes: synthesis of nickel-containing nanoparticles from nickel(II) nitrate hexahydrate in ethylene glycol using hydrazine hydrate; synthesis of interconnected porous poly(acrylic acid) hydrogel; mixing of nickel-containing nanoparticles with hydrogel at a concentration of 30-40% by weight; high-speed homogenization and film formation. The resulting material has nickel-containing nanoparticles distributed in and / or on the porous network of the hydrogel, shielding against electromagnetic interference by a predominantly absorption mechanism, achieving an efficiency of approximately 30-64 dB in the X-band, where the 40% N / H sample has an absorption component of approximately 61.7 dB, a reflection component of approximately 2-3 dB, and thermal stability up to approximately 595 °C.