Interaction between two double layers for FeCl3 types electrolytes at y 0 > y d > 01

摘要

Interaction between two double layers for FeCl3 type electrolytes at y _0 > y _d > 0 were investigated with the aid of λ parameter methods and the accurate numeral results were given. When y d increases, the interaction energies increase at constant y 0 and ξ _d. The maximum of the interaction energies between two double layers for A_(v+) B_(v-) type electrolytes at y _0 > y _d > 0 is independent of y 0, but increases with the augment of y d. The interaction energies between two double layers for NaCl, CaCl2, FeCl3 and Na2SO4 type electrolytes at y _0 = 5 and y _d = 2 were compared. If the negative or positive ions for {ie39-2} type electrolytes have the same charge number, the maximum of their interaction energies increases with the augment of the charge number of the ions with opposite charge. For a pairs conjugate type electrolytes like CaCl_2 and Na_2SO_4 or FeCl_3 and Na_3PO_4, the larger the charge number of the negative ions is, the larger the maximum of the interaction energies is. The results for FeCl3 type electrolytes at y _0 > y _d > 0 can also be applied to Na_3PO_4 type electrolytes at y _0 < y _d < 0.