Surface Activity and Micelle Formation of Anionic Azobenzene-Linked Surfactants

Abstract

The adsorption phenomena and micellization of sodium 4-((4‘-alkylphenyl)azo)benzenesulfonates, C n AzoSO3Na (C n = C2H5, C4H9, C8H17), and sodium 4-((4‘-alkylphenyl)azo)benzoates, C n AzoCOONa (C n = C4H9, C8H17), were studied by means of surface tension and cyclic voltammetric (CV) techniques and compared with the respective parameters of the standard sodium alkanesulfonates, sodium alkylbenzenesulfonates, and sodium alkanecarboxylates. The presence of the azobenzene moiety in the surfactant molecule as a link between the hydrophobic tail and the anionic head group improves the surfactant solubility in water and introduces the hydrophobic character comparable to the effect of 8.4 methylene groups of the main alkyl chain in the assumed standards. The hydrophobic nature of both phenylene groups attached to the azo entity depends upon the position of these groups in the hydrophilic/hydrophobic zones.

Macroporous resin purification of grass carp fish (Ctenopharyngodon idella) scale peptides with in vitro angiotensin-I converting enzyme (ACE) inhibitory ability

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Hempseed protein derived antioxidative peptides: Purification, identification and protection from hydrogen peroxide-induced apoptosis in PC12 cells

“…This phenomenon results from various interactions, including those characterised by hydrophobic and electrostatic forces. Physical properties of resins (surface area, pore radius, pore distribution and porosity) play an important role in determining states and equilibria of adsorption (Koź lecki, Sokolowski, & Wilk, 1997). It is known that the resins with larger surface area have good adsorption capacity.…”

Mechanism and behavior of surfactant adsorption onto resins with different matrices

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