Deuterium nuclear magnetic resonance study of lipophilic chains in the C12E3/decane/water ternary system

The order parameters of lipophilic chains in the liquid crystalline phases of the C12E3/decane/water ternary system have been studied by deuterium NMR spectroscopy. The order parameters derived indicate that the decane molecu les added to the C12E3/water system penetrate into the lipophilic alkyl lay er of the surfactant and make the structure of the lipophilic layer disorde red. The lipophilic layers in the reversed hexagonal phase are more disorde red than those in the lamellar phase.