Abstract:
The adsorption behaviour of sorbiton monolaurate, a nonionic surfactant, was investigated at benzene/water toluene/water, paraffin oil/water and carbon tetrachloride/water interfaces by employing a ring detachment method (Du Nuoy tensiometer) at 20°C. In this report surface tension vs concentration curves, adsorption vs concentration isotherms and graphs of film pressure vs area per molecule of adsorbed surfactant were computed. From these data the extent of adsorption, the orientation and the packing of adsorbed molecules at the interfaces were derived. The extent of adsorption of sorbitan monolaurate at different oil/water interfaces were considered to be due to hydrophobic/hydrophilic ratio of the adsorbed molecule with respect to each oil.
Page(s):
35-45
DOI:
DOI not available
Published:
Journal: Physical chemistry, Volume: 11, Issue: , Year: 1992