title: Bilayer-gel membranes. Formation and some properties.
abstract: We developed a new procedure which induces multifunctional reagents to crosslink at one interface between a black bilayer and the adjacent water phase. This procedure yields "bilayer-gel" membranes, i.e. membranes consisting of a bilayer and a polymer layer. The bilayer-gel membrane may tentatively be considered to be a new membrane system, because the formation of the polymer layer changes some bilayer properties. We studied bilayer-gel membranes composed of a bilayer of oxidized cholesterol and of a polymer layer of poly-L-lysine crosslinked by glutardialdehyde. Compared to unmodified bilayers, this membrane system has an electrical conductance of the same magnitude, the same electrical capacity and similar shapes of current-voltage dependences. However, this system is asymmetrical and differs in ion selectivity and increased stability from an unmodified bilayer.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002784:Cholesterol; D005782:Gels; D005976:Glutaral; D008567:Membranes, Artificial; D008722:Methods; D010084:Oxidation-Reduction; D010455:Peptides; D011107:Polylysine; D011199:Potentiometry; D013261:Sterols
chemical_list: D005782:Gels; D008567:Membranes, Artificial; D010455:Peptides; D013261:Sterols; D011107:Polylysine; D002784:Cholesterol; D005976:Glutaral