Direct Determination of the Distribution Coefficient of Tridecyl Dimethyl Phosphine Oxide between Water and Hexane

Colloids and Interfaces

Makievski, Alexander V.¹  Aidarova, Saule B.²  Kovalchuk, Volodymyr I.³  Sharipova, Altynay A.⁴  Aksenenko, Eugene V.⁵  Fainerman, Valentin B.⁶ 

[1] Author to whom correspondence should be addressed;Institute of Biocolloid Chemistry, National Academy of Sciences of Ukraine, Kyiv (Kiev) 03680, Ukraine;Institute of Colloid Chemistry and Chemistry of Water, National Academy of Sciences of Ukraine, Kyiv (Kiev) 03680, Ukraine;Institute of Industrial Engineering, Kazakh National Research Technical University Named after K.I. Satpaev, Almaty 050013, Kazakhstan;MPI Colloids and Interfaces, Potsdam 14424, Germany;SINTERFACE Technologies, Berlin D12489, Germany

关键词: adsorption kinetics;    nonionic surfactant;    diffusion-controlled adsorption;    water-oil interface;    distribution coefficient;    surfactant partitioning;    drop profile analysis tensiometry;   

DOI  :  10.3390/colloids2030028

学科分类：物理化学和理论化学

来源: mdpi

【 摘 要 】

Drop profile analysis tensiometry is applied to determine the distribution coefficient of a nonionic surfactant for a water/hexane system. The basic idea is to measure the interfacial tension isotherm in two configurations: a hexane drop immersed in the surfactant aqueous solutions at different bulk concentrations, and a water drop immersed into a hexane solution of the same surfactant. Both types of experiments lead to an isotherm for the equilibrium interfacial tensions with the same slope but with a concentration shift between them. This shift refers exactly to the value of the distribution coefficient.

【 授权许可】

CC BY