Properties of Anionic–Cationic Adsorption Films in the Presence of Inorganic Electrolytes

✍ Scribed by Danuta Góralczyk

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 164 KB
• Volume: 184
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0604

✦ Synopsis

their mixture, respectively, required to produce a definite The composition and mutual interaction of the components in value of the surface tension, and b is a parameter characanionic-cationic adsorption films have been determined by using terizing mutual interactions of the adsorbed components. to the mixed monolayers a regular solution model. The effect of This parameter assumes positive values in the case of the inorganic electrolyte concentration and kind on the properties repulsive interactions and negative in the case of attractive of monolayers adsorbed from solutions containing decylpyridininteractions. Equation [1] makes it possible to calculate ium chloride and sodium decylsulfonate in concentration ratios also the mixed monolayer composition, which is usually varying over a wide range has been investigated. The calculations different from the solution composition. This equation is have been performed both neglecting and taking into consideration based upon the assumption that molar areas of the compothe effect of surface interactions on the partial molar areas of surfactants in the mixed monolayer. It has been found that al-nents are the same in the mixed monolayer and in the though calculation results are very different, all conclusions consingle-component monolayers, i.e., A i Å A Њ i . This assumpcerning the effect of the solution composition are almost the same tion is valid only in the case of weak interactions of adin both cases.