TY  - JOUR
A1  - Reiche, Jürgen
A1  - Kamusewitz, Helmut
A1  - Keller, Manuela
A1  - Brehmer, Ludwig
A1  - Peñacorada, Florencio
T1  - Study of gas transport through composite membranes with a stabilised Langmuir-Blodgett skin layer
N2  - The Langmuir-Blodgett (LB-) technique is used to deposit molecular reinforced separation layers on porous polymer substrates resulting in composite membranes for gas separation. The adsorption of a polycation to the arachidic acid Langmuir layer and the subsequent transfer of the highly ordered and stabilised monolayer onto a polypropylene membrane (Cellgard 2400) yields a laminated separation layer combining the advantageous high degree of order of fatty acid films and the stability of thin polymeric films. X-ray reflectivity data of these films confirm the transfer of the assembled polymer layer together with the fatty acid monolayer and the formation of ordered Y-type LB-films. SFM pictures show a dense film without pinholes completely covering the porous support. Gas permeation measurements are used to study the transport process of different gases through the composite membrane.
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Schröter, J. A.
A1  - Plehner, R.
A1  - Tschierske, C.
A1  - Katholy, Stefan
A1  - Janietz, Dietmar
A1  - Peñacorada, Florencio
A1  - Brehmer, Ludwig
T1  - Monolayer properties of a new family of amphiphiles with an unusual head-group topology
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Knobloch, Harald
A1  - Peñacorada, Florencio
A1  - Brehmer, Ludwig
T1  - Ellipsometric studies on Uranyl Arachidate Langmuir-Blodgett films
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Peñacorada, Florencio
A1  - Souto, Jorge
A1  - Katholy, Stefan
A1  - Saja, José-Antonio de
A1  - Reiche, Jürgen
T1  - Structure of Langmuir monolayers of substituted phthalocyanines
N2  - Langmuir floating layers of two phthalocyanine derivatives, ytterbium bisphthalocyanine and tetra-tert-butyl nickel phthalocyanine, were investigated by means of compression isotherms, surface potential kinetics and Brewster angle microscopy (BAM) in order to study the influence of peripheral substituents on the structure and stability of these films and on their suitability for a subsequent transfer onto solid substrates. Specific substitutions that may lead to amphiphilic molecular units seem to play a key role in the development of well organised thin films prepared with this technique.
Y1  - 1998
ER  -