Influence of Protic Liquids on the Formation of Lyotropic Mesophases in Binary Systems with K‐Laurate

Abstract

Comparing the phase diagrams of three binary soap systems (soap:K-laurate = KClz) KCIZ/glycerol, KClz/ethylene glycol and KClz/butylene glycol we found alterations in the types of phase diagrams that depend on the protic solvents. A different polymorphism in the binary systems were observed which was dependent on the solvent. In the sys-crystalline phase, G = gel phase, H = hexagonal phase, L = lamellar phase, S = isotropic solution), in the binary system KClz/E: C cf G c* L c* S , in the binary system KCI2/B: C cf G cf L cf S . The differences in number, position, extension and sequence of occurring mesophases are a function of the composition in the binary systems and of the temperatures. We came to the conclusion that the influence, which the solution medium exerts on the formation of structures in the binary systems, is very distinct and pronounced * Author's address: Prof. Dr. habil. H.-D. Dorfler, Technische Universitat D r e s d e n , Lehrstuhl f u r Kolloidchemie, M o m m -senstraBe 13, D-01062 D r e s d e n , Germany. L i t e r a t u r e '