固-液界面上的吸附膜

The Surface Films on the Solid-Liquid Interfaces

利用Gibbs吸附公式处理了硅胶自四氯化碳和环己烷中吸附脂肪醇、环己醇、苯甲醛、苯甲醚、乙酸丙酯的实验结果,得到吸附膜的表面压(π)和分子面积(A)的关系曲线,这些曲线均可用描述不溶物液态扩张膜的Smith方程描述.文中对所得结果给出了初步的解释.

The surface pressure (π) and the area occupied per adsorbed molecule (A) on the silica gel/carbon tetrachloride (or cyclohexane) interface have been calculated by the Gibbs adsorption equation from the adsorption isotherms of aliphatic alcohol, cyclohexanol, anisole, benzaldehyde and propyl acetate. The resulting π-A curves were similar to the liquid expanded state on water. All the curves can be represented by the Smith's equation. The equation is where A_o is the limiting area per moleoule at adsorption on the solid/liquid interface.