101882-78-4Relevant articles and documents
Membrane composites derived from porous versus nonporous surfactants: Evidence for uniqueness of calix[6]arene-based surfactants
Lee, Woongki,Hendel, Robert A.,Dedek, Petr,Janout, Vaclav,Regen, Steven L.
, p. 6793 - 6794 (1995)
In this paper we provide evidence for uniqueness of calix[6]arene surfactants as building blocks for the construction of permeation-selective composites. Specifically, we show that membranes made from poly[1-(trimethylsilyl)-1-propyne] (PTMSP) plus multilayers of calix[6]arene I exhibit significant permeation selectivity toward He and N2, but that those based on arachidic acid (AA), cadmium arachidate (AA/Cd2+), a polyion complex of AA plus poly(ethyleneimine) (AA-PEI), and stearamide oxime (SA) show no permeation selectivity and no alteration in the barrier properties of the support. We also report results of surface analyses of PTMSP/I and PTMSP/SA by X-ray photoelectron spectroscopy (XPS) that offer insight into the origin of these striking differences.