塩化アルキルアンモニウムを吸着したガラス粒子の界面動電位とその熱力学的研究

抄録

Adsorption of ions and molecules on glass particles were studied in primary and quaternary alkylammonium chloride solutions. It was found by the streaming potential method that the amount of adsorption of primary alkylammonium ion increased with increase of alkyl chain length, but the amount of adsorption of quaternary alkylammonium ion was less than that of primary compounds and showed minimum in tetraethylammonium chloride solution. The difference was explained by static electric and hydrophobic characters of alkylammonium ions. The ammount of adsorption of primary alkylammonium ions plotted against reduced concentration c/c₀ showed a single curve for C₆-C₁₄ alkylammonium chloride. From these treatments, the energy of adsorption at glass-solution interface and that of formation of micelles per methylene group of primary alkylammonium ions were determined. The amounts of adsorption of alkylammonium ions, chloride ions, and hydrated alkylamine at Stern layer and diffuse layer were calculated from the values of Γ_σ, Γ_AA, Γ_Cl, and Γ_pH obtained by the experiments.