Small-angle neutron scattering of mixed ionic perfluoropolyether micellar solutions

The small-angle neutron scattering method is used to investigate the aqueous mixed micellar solutions of perflouropolyether carboxylic salts with ammonium counterions, as their shapes and dimensions are highly affected by the presence of the n3 surfactant. The analysis reveals that a close packing of the tails leads to a decrease in the micellar curvature and repulsions between the polar heads, which ultimately leads to a micellar growth in the ellipsoids with greater axial ratios.