The measurements of the surface tension of the aqueous solution of n-octyl-β-d-glucopyranoside (OGP) and sodium dodecylsulfate (SDDS) mixtures were performed. From the obtained results the composition and density of the mixed surface layer, standard Gibbs free energy of adsorption and Gibbs free energy of the OGP and SDDS mixing in the surface layer were determined. These parameters were discussed based on the size of OGP and SDDS molecules as well as their contactable area at perpendicular and parallel orientations. These parameters were also discussed with regard to SDDS-SDDS, OGP-OGP and SDDS-OGP Gibbs free energy of interactions through the water phase. These interactions were determined on the basis of the components and parameters of the hydrophobic and hydrophilic parts of the surfactants molecules. Their values were compared to the parameter of the interactions between the SDDS and OGP molecules in the surface layer at the water-air interface. The negative values of this parameter suggest that there is the synergistic effect in the reduction of water surface tension by the OGP and SDDS mixture.

正辛基-β- d水溶液的表面张力的测定进行了吡喃葡萄糖苷（OGP）和十二烷基硫酸钠（SDDS）的混合物。从获得的结果中，确定混合表面层的组成和密度，在表面层中混合的OGP和SDDS的标准吸附吉布斯自由能和Gibbs自由能。这些参数是基于OGP和SDDS分子的大小以及它们在垂直和平行方向上的可接触区域进行讨论的。还就水相相互作用的SDDS-SDDS，OGP-OGP和SDDS-OGP吉布斯自由能讨论了这些参数。这些相互作用是根据表面活性剂分子的疏水和亲水部分的组成和参数确定的。将它们的值与水-空气界面的表层中SDDS和OGP分子之间相互作用的参数进行比较。该参数的负值表明OGP和SDDS混合物在降低水表面张力方面具有协同作用。