Unusual pressure effects on the permeation properties of a Langmuir-Blodgett composite membrane
- Lehigh Univ., Bethlehem, PA (United States)
In this paper, the authors document their discovery of extraordinary permeation properties of composite membranes derived from Langmuir-Blodgett (LB) multilayers of calix[6]arene I plus poly[1-(trimethylsilyl)-1-propyne] (PTMSP) film. Specifically, it is shown that the intrinsic permeability and selectivity of such composites toward He and N{sub 2} increase with increasing permeant pressures. In striking contrast, analogous composites prepared with a `conventional` polymeric surfactant, poly(1-octadecene-co-maleic anhydride) (II) show unexceptional behavior, i.e., permeation characteristics that are independent of pressure. The theoretical and practical implications of these findings are briefly discussed. 8 refs., 2 figs.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-85ER13403
- OSTI ID:
- 159707
- Journal Information:
- Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 42 Vol. 117; ISSN JACSAT; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- English
Similar Records
Insight into the permeation selectivity of calix[n]arene-based Langmuir-Blodgett films: Importance of headgroup association and the solid phase
Membrane composites derived from porous versus nonporous surfactants. Evidence for uniqueness of calix[6]arene-based surfactants