Lecithin organogels with polar additives: Rheological studies

Viscoelastic properties and dynamic behavior of organogels prepared by the addition of polar substances (water, glycerol, ethylene glycol, and formami de) to lecithin solutions in n-decane were studied using vibrational rheome try. It was shown that the viscosity and static modulus of gel-like phases and the dynamics of polymer-like micelles are dependent to a large extent o n the type of polar additive and its concentration. Based on the analysis o f the dependences of loss versus storage moduli, various types of micelle m otions were revealed: by the reptation and the Rouse mechanisms, as well as the intermediate regime.