The theory of the adsorption monolayer with lateral intermolecular interaction and its application to aqueous alcohol solutions.

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概要

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• A theoretical relation between the fractional adsorption amount, θ, and the concentration, <I>C</I>, taking account of the lateral interaction between the adsorbed molecules is used to integrate the Gibbs equation, and the relation between the surface pressure, <I>F</I>, and the molecular area, <I>A</I>, is derived. Since the equation does not contain the parameter, <I>k</I><SUB>0</SUB>, related to the strength of adsorption, it is concluded that there is no substantial difference between the adsorption monolayers and the insoluble monolayers. The relation between <I>F</I> and <I>C</I> is also derived and compared with the experimental data for normal alcohols. The standard affinity of adsorption, −<I>Δ</I>μ<SUP>0</SUP>, and the energy of lateral interaction, ε, increased linearly with the number of carbon atoms of the alcohols, <I>n</I>. Finally, it has been shown that the experimental data can be explained well with the theoretical equation presented here, but not with Szyszkowski's, the latter being derived for negligible lateral interaction.

• 公益社団法人 日本化学会の論文

著者

• Nakagaki Masayuki

  Faculty of Living Science Osaka City University

• Yamamoto Mihoko

  Faculty of Pharmaceutical Sciences, Kyoto University

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