The Study of Surface Dilational Properties of Nonionic Surfactant Solutions by Propagation of Electrocapillary Waves

摘要: Abstract An efficient experimental technique for the study of dynamic surface dilational properties through electrocapillary waves has been developed. Surface at air/liquid interface are generated with deflection and detected by specular reflection a focused laser beam. Without contacting surface, capillary wavelengths damping coefficients were measured and, thus, moduli determined in frequency range 50 to 500 Hz various nonionic surfactants. We found that modulus entire submicellar is independent this range. This observation consistent data obtained low frequencies previously published literature. Above CMC, become constant increasing concentration. implies essentially