部分混和性溶媒下での中和反応中の対流パターンに及ぼす溶質モル濃度の影響

抄録

In this study, PIV experiments were conducted during neutralized chemical reaction in partially miscible solvents using Hele-Shaw cell. The acetic acid in iso-butanol (AC) were set on the sodium hydroxide aqueous solution (NaOH) in the cell. Ratio of initial molar concentrations was unity which was defined by R = C₀, _AC/C₀, _NaOH. For C₀ = 0.2 mol/L, the vorticity was initially generated at the liquid-liquid interface due to Marangoni convection while the vorticity was also generated at the iso-butanol layer due to Rayleigh-Taylor instability. The vorticity decreased monotonously with time. On the other hand, for C₀ = 2.0 mol/L, the vorticity was found to increase and decrease for a while and then eventually decay. It was suggested that the increment and decrement of the vorticity could be caused by both the interfacial flow due to Marangoni convection and interface fracture at the liquid-liquid interface.