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KMID : 1024520000090050403
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Journal of the Environmental Sciences
2000 Volume.9 No. 5 p.403 ~ p.408
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Partial Charge and CMC Characteristics of Hydrophilic and Hydrophobic Group of Surfactants (Cationic and Amphoteric Surfactant)
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Ha Youn-Shick
Seo Moo-Lyong
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Abstract
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On the basis of theory of Bratsch’s electronegativity equalization the electronegativity equalization the group electronegativities and the group partial charges for cationic and amphoteric surface and amphoteric surfactants could be calculated using Pauling’s electronegativity parameters. From calculated output we have investigated relationships between CMC(critical micelle concentration) and partial charge and group electronegativity of hydrophilic and hydrophobic groups structural stability of micelle for cationic and amphoteric surfactants. As a result CMC depends upon partial charge and electronegativity of hydrophilic group is decreased. With increasing the carbon number of hydrophilic group for cationic surfactant its partial charge is increased but CMC and its electronegativity are decreased. With increasing the carbon number of hydrophobic group for cationic and amphoteric surfactant its partial charge is increased but CMC andits electronegativity are decreased.
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KEYWORD
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cationic surfactant, amphoteric surfacant, critical micelle concentration, partial charge, electonegativity
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