Conductive polyacrylate coatings filled with bimetal Cu–Ni, Zn–Cu, or Zn–Ni powders and graphene nanoplatelets

Abstract

AbstractConductive coatings on a glass substrate are widely used in electronics and automotive, ship, aircraft, and optical industries. The method for obtaining electroconductive polyacrylate coatings filled with bimetal Cu–Ni, Zn–Cu, or Zn–Ni particles and graphene nanoplatelets (GNPs) is developed in this work. At the ratio GNPs:bimetal powder:polymer of (33–35):(17–35):(30–50) (wt%) and the coating thickness 50 μm specific volume resistance is 0.12–0.26 Ω·cm owing to the percolation effect. Bimetal particles are synthesized by nickel or copper ions reduction from aqueous solutions on copper or zinc particles. Their composition is regulated by the duration of metal ions reduction. Bimetal particles have a structure of copper or zinc core with a loose shell of nickel or copper nanoparticles, they ensure the contact between GNPs forming a continuous network in polymer matrix. GNPs are obtained by thermal exfoliation of natural flake graphite treated in liquid ammonia containing metal sodium. Polymer composite is prepared using the solution of methyl‐ and n‐butylmethacrylate copolymer. Coatings have adequate adhesion to the glass, and owing to their high conductivity, absence of noble metals, simplicity and cheapness of fabrication can be used for production of conductive elements on glass and other substrates.Highlights Cu–Ni, Zn–Cu, or Zn–Ni powder and GNPs filled conductive polyacrylate coatings Bimetal core‐shell particles are obtained by Ni(II) or Cu(II) reduction in solutions Bimetal particles and GNPs form a network in polymer with percolation effect Specific volume resistance of coatings 50 μm thick on glass is 0.12–0.26 Ω·cm Coatings conductivity and adhesion to glass open great prospects for application