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Aggregation properties of amphiphilic poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymer studied by cyclic voltammetry

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Journal of Surfactants and Detergents

Abstract

The cyclic voltammetric behaviors at a platinum electrode of an amphiphilic block copolymer [poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (F127)] in aqueous solutions were investigated. The mechanism of the electrochemical reaction of F127 at a platinum electrode was deduced. The diffusion coefficients of different-shaped aggregates formed by F127 were determined on this basis. The first and second critical micelle concentrations, corresponding to the formation of spherical micelles and the transition of the spherical to rod-like micelles, were 3.72×10−4 mol·L−1 and 1.49×10−3 mol·L−1, respectively, which could be confirmed by the fluorescent anisotropy of pyrene in the F127 aggregates and the morphology of F127 micelles observed by freeze-fracture transmission electron microscopy.

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Abbreviations

CMC:

critical micelle concentration

FF-TEM:

freeze-fracture transmission electron microscopy

PEO:

poly(ethylene oxide)

PPO:

poly(propylene oxide)

SCE:

saturated calomel electrode

UV-vis:

ultraviolet-visible

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Authors and Affiliations

  1. School of Chemistry & Chemical Engineering, Yangzhou University, 225002, Yangzhou, People's Republic of China

    Yuanhua Ding, Ying Wang & Rong Guo

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  1. Yuanhua Ding
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  2. Ying Wang
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  3. Rong Guo
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Correspondence to Rong Guo.

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Ding, Y., Wang, Y. & Guo, R. Aggregation properties of amphiphilic poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymer studied by cyclic voltammetry. J Surfact Deterg 7, 379–385 (2004). https://doi.org/10.1007/s11743-004-0322-x

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  • DOI: https://doi.org/10.1007/s11743-004-0322-x

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