Interaction energy between magnetic particles in a dispersion system

Abstract The interaction energy between magnetic particles in a dispersion was investigated by calculation. In the calculation of magnetic interaction, the particle was divided into many cells, each of which had an element dipole. The total magnetic interaction was obtained by summing the interactions between these element dipoles. Steric repulsion of an adsorbed polymer layer and van der Waals attraction were also considered. The effects of particle aspect ratio, particle size, the thickness of adsorbed polymer layer, and magnetization on the interaction energy are discussed, based on the results of the calculation. The interaction energy between a particle and a floc is also mentioned.