Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Chemical Engineering
Water-Insoluble Complexes Of Poly(L-Lysine) With Mixed Alkyl Sulfates: Composition-Controlled Solid State Structures, William Macknight, Ekaterina A. Ponomarenko, David A. Tirrell
Water-Insoluble Complexes Of Poly(L-Lysine) With Mixed Alkyl Sulfates: Composition-Controlled Solid State Structures, William Macknight, Ekaterina A. Ponomarenko, David A. Tirrell
William MacKnight
Structures of the water-insoluble complexes of poly(L-lysine) with octyl and octadedecyl
sulfates, and with the mixtures of these surfactants, were examined via X-ray diffraction, infrared
spectroscopy, and differential scanning calorimetry. The solid-state structures of the complexes were
shown to be governed by their compositions. In the stoichiometric poly(L-lysine) complex with octadecyl
sulfate, surfactant chains crystallize on a hexagonal lattice. In the poly(L-lysine)-octyl sulfate complex
of nearly stoichiometric composition, the surfactants are arranged on an alkane-type two-dimensional
lattice. In the complex with 20 mol % octadecyl sulfate and about 75 mol % octyl sulfate, the longer
surfactant chains form hexagonal crystalline …