Diffusion coefficients and structure properties in the pluronic F127/n-C4H9OH/H2O system

Diffusion coefficients of different aggregates in aqueous solutions formed by an amphiphilic block copolymer, Pluronic F127 (17127), were determined by cyclic voltammetry, and the critical micelle concentration (CMC, 4.31 x 10(-4) mol L-1) of F 127 was obtained. The added n-butanol facilitates the formation of micelles from the monomers of F127 and makes the critical micelle temperature (CMT) of F127 solutions decrease. The diffusion coefficient of the F127 micelles decreases relatively fast at first with increasing n-butanol and then the decreasing trend slows after the solubilization of n-butanol in micelles reaches maximum.