SPREADING OF CLAY ORGANOCOMPLEXES ON AQUEOUS-SOLUTIONS - CONSTRUCTIONOF LANGMUIR-BLODGETT CLAY ORGANOCOMPLEX MULTILAYER FILMS

Dilute dispersions of hexadecylammonium (1) and dioctadecylammonium he ctorite (2) clay organocomplexes, dispersed in butanol/benzene mixture s, have been spread on the surfaces of water and aqueous electrolyte s olutions in a Langmuir trough. Surface pressure (II) vs reduced surfac e area (AR) and surface potential vs AR isotherms, in situ reflectivit y and Brewster-angle microscopic measurements, ex situ transmission el ectron microscopy, and small-angle X-ray scattering (SAXS) measurement s established the formation, at the aqueous solution-air interface, of a layer of overlapping clay platelets with thicknesses ranging from 5 0 to 130 Angstrom. Langmuir-Blodgett clay organocomplex multilayer fil ms have been prepared from 1 and 2 by Z-ty pe deposition onto solid su bstrates.