Effect of water-soluble polymers additive and surface treatment on particle size distribution are shown in this article.
Keywords: electrolytic copper powder, water-soluble polymer, polyvinylpyrrolidone, polyacrilamide, electropolishing, atomic force microscopy
The article presents a comparative analysis of nanopowders of copper obtained by electrolysis with the use of the stabilizer polyvinylpyrrolidone (PVP). It is established that the properties of powders of copper determines PVP polymer film formed on the surface of nanoparticles
Keywords: Nanopowders of copper, stabilization of particles, granulometric composition, differential thermal analysis, water-soluble polymer
The effect of two surface-active substances (SAS) - polyvinylpyrrolidone (PVP) and polyacrilamide (PAA) on formation kinetics of anodic synthesized electrolytes for copper powders production was reviewed, as well as product properties. It was found that the copper powder properties defined by polymer film of PVP and PAA formed on cathode surface. Nanosized particles percentage increasing by dints of copper ions direct discharge from ammonia complex ions provided by polymer film. In the electrolyte containing PAA is possible to obtain copper powder with nanosized (less 100 nm) particles content of 50,2%, average size in nanosized range is 43nm with needle-dendrite particle shape
Keywords: electrolytic copper powder, vibrating cathode, polarization curve, chronopotentiometry, potential dip after current tripping, particle size distribution, water soluble polymer, nanosized particle, ammonia chloride, polyvinylpyrrolidone, polyacrilamide, am
In this article methods of copper ultrafine powders stabilization from agglomeration and aggregation by water soluble polymer in process of production by electrolysis on vibrating cathode, as well as their effect on physical and mechanical properties of polymer composites.
Keywords: ultrafine powders, stabilization, friction coefficient, wear, structure of composite materials
Regularities of copper's Nano powders receiving by an electrolysis method in ammine electrolyte, with the soluble copper anode and the corrugated titanic cathode are investigated. With additional use of polyacrylamide as the stabilizer of particles' growth of Nano powder of polyacrylamide. It is shown that in the polyacrylamide's presence the share of Nano dimensional fraction of copper's powder raises and the contents in the final product of copper`s oxides decreases. To what Nano powders' roentgenograms testify.
Keywords: copper's Nano powder, electrolysis, part of electrolyte, phase structure
Influence of the fluorinated surface-active substances entered info a solution of chemical nickel plating, on operational properties nickel-phosphoric of the coverings besieged from investigated structures (solutions) is considered.
Keywords: nickel-phosphoric of the covering; surface-active substances; operational properties
Information about authors of issue №4 (2011)