Thin liquid films from aqueous solutions of non-ionic polymeric surfactants

摘要: Abstract The conditions of formation and stability foam, emulsion, wetting films from aqueous solutions non-ionic polymeric surfactants have been established. Two types – PEO–PPO–PEO three-block copolymers (A–B–A type) hydrophobically modified inulin graft polymer (AB n explored. Information about surface forces nanoscale phenomena in containing was obtained using the micro-interferometric technique Thin Liquid Film–Pressure Balance Technique. forces, which determine foam emulsion films, distinguished, namely: DLVO-forces at low electrolyte concentrations non-DLVO-forces high concentrations. Non-DLVO-forces are steric brush-to-brush loop-to-loop interaction type according to De Gennes. A substantial difference behavior these two film has established case O/W transitions Newton black (NBF) observed. These very stable so respective emulsions. In contrast relatively thicker compared their thickness depends on concentration AB surfactant. repulsion loops tails surfactant a hydrophilic solid surface. For surfaces with different degrees hydrophobicity only degree hydrophobicity. Otherwise unstable rupture. bilayer distinguished for first time. One is related or interactions other NBF where also between strongly hydrated brush but they short-range acting two-dimensional ordered system. They stability.