A Study of the Properties of Aqueous Systems of Mixed Derivatives of 10-Undecenoic Acid

The surface activity and aggregate behavior of the mixed systems of N,N-[2-(10-undecenoylmethyltaurine)]sodium(UDMTS) and trimethyl [2-(10-undecenoyloxylethyl)] ammonium iodide were investigated. According to the regular solution theory, the molecular interaction parameters and the composition of the surface adsorption layer and micelle have been calculated. It was revealed that double bond at the end of hydrophobic chain, ester-bond and amido-bond near the hydrophilic group of the surfactant molecule reduce the molecular interaction between cationic and anionic surfactant molecules. Furthermore, tiny amount of fatty alcohol is effective to a transition from micelle to vesicle.EI022902