We produced a group of surfactin isoforms using Bacillus subtilis HSO121.The micellization activity properties such as surface and interfacial tensions, micropolarity, micelle size distribution and morphology of this group of surfactin micellar solutions were investigated by surface and interfacial tension, fluorescence, dynamic light-scattering (DLS), and freeze-fracture transmission electron microscopy (FF-TEM) measurements.With an increase in the chain length, we found that the surface and interfacial activities of the surfactins increased and the surfactins tended to form larger micelle aggregates.%采用表面张力、界面张力、荧光、动态光散射(DLS)和冷冻刻蚀电镜(FF-TEM)等方法,研究了由Bacillus subtilis HSO121所产生的一组表面活性素的胶束化行为.通过对表面活性素溶液表面张力、表面活性素对水/正己烷界面张力的影响、表面活性素胶束微极性以及胶束粒径和形态的研究,发现随着表面活性素脂肪链长度的增加,其表界面活性增强,溶液中趋向于形成更大的聚集体.
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