Synthesis and Electrophoretic Concentration of Silver Nanoparticles in Water-in-Oil Emulsions of Sodium Bis(2-Ethylhexyl) Sulfosuccinate and Preparation of Conductive from Them Coatings by Selective Laser Sintering

Resumo

Stable silver organosols with a particle diameter of 7 nm containing up to 0.1 M metal have been prepared in water-in-oil dynamic emulsions stabilized with a surfactant, sodium bis(2-ethylhexyl) sulfosuccinate. Liquid-phase concentrates with silver concentrations up to 8 M have been obtained from them by nonaqueous electrophoresis. Thin films and powdered redispersible composites with silver contents up to 75 wt % have been prepared by solvent evaporation. Conductve lines with a width of nearly 70 μm have been formed by selective laser sintering of the thin films of these composites. The specific electrical conductivity of the lines is about 20% of the conductivity of bulk silver. It has been shown that the unsintered composite may be used repeatedly.