Aggregation behavior and complex structure between triblock copolymer and anionic surfactants

作者: Yiming Li , Mutai Bao , Zhining Wang , Haixia Zhang , Guiying Xu

DOI: 10.1016/J.MOLSTRUC.2010.11.028

关键词:

摘要: Abstract The aggregation behavior and complex structure of ABA triblock copolymer EO 76 PO 30 (F68) with sodium dodecyl sulfate (SDS) bis(2-ethylhexyl)sulfonate (AOT) in aqueous solution were investigated by surface tension, fluorescence techniques dynamic light-scattering (DLS) measurements. It is revealed that certain regions binding, surfactant/F68 complexes are formed. Structural informations size evaluated. When F68 present its nonassociated state, F68/micellar SDS formed at concentrations above critical concentration (cac). cac well below the micellar (cmc) pure SDS, a model suggesting how presence described. Experimental results show interacts mainly through hydrophobic forces, polypropylene oxide (PPO) groups solubilized into cores poly(ethylene oxide) (PEO) interact micelles. This interaction mechanism “pearl-necklace” structure. However, different occurs for F68/AOT lower concentrations, as AOT ion–dipole interactions. Complexes “wrapping”

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