Effect of Na plus on the collision of the dodecane droplet and kinetic energy transfer

Using a high-speed motion acquisition system, the dodecane droplet size and the interface energy of the dodecane-solution interface during the collision between the dodecane droplet and the dodecane layer at different Na+ concentrations were studied. The collision process is divided into three stages: Contact stage, Stretch stage and Attenuation amplitude stage. The size of the dodecane droplet gradually decreases as the Na+ concentration increases, and the stretching time does too. The kinetic energy of the dodecane droplet, the surface energy of the dodecane-solution interface, and the net force of the dodecane droplet all decrease with an increase in Na+ concentration, but the dodecane droplet rate of energy dissipation increases. The effect of Na+ concentration on dodecane-solution interfacial tension is the main reason for the collision difference. The Na+ added to the solution forms a hydration shell around it, weakening the interaction between water molecules at the dodecanesolution interface and within the solution, leading to reduced interfacial tension. The advancement of mineral flotation technology may benefit greatly from these findings.