Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (05): 1128-1134.doi: 10.3866/PKU.WHXB20110436

• SOFT MATTER • Previous Articles     Next Articles

Effects of Molecular Structure on Surfactin Micellization Activity

LI Yi, ZOU Ai-Hua, YE Ru-Qiang, MU Bo-Zhong   

  1. Institute of Applied Chemistry, East China University of Science and Technology, Shanghai 200237
  • Received:2010-11-15 Revised:2011-01-17 Published:2011-04-28
  • Contact: MU Bo-Zhong
  • Supported by:

    The project was supported by the Research Fund for the New Teacher of the Doctoral Program of Higher Education of China (200802511024) and Shanghai Municipal Science and Technology Commission, China (071607014).


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.

Key words: Surfactin, Micelle, Fluorescence, Dynamic light-scattering, Freeze-fracture transmission electron microscopy