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  Kinetics of Cosurfactant−Surfactant−Silicate Phase Behavior. 2. Short-Chain Amines

Ågren, P., Linden, M., Rosenholm, J. B., Blanchard, J., Schüth, F., & Amenitsch, H. (2000). Kinetics of Cosurfactant−Surfactant−Silicate Phase Behavior. 2. Short-Chain Amines. Langmuir, 16(23), 8809-8813. doi:10.1021/la000402k.

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 Creators:
Ågren, P.1, 2, Author              
Linden, Mika1, 2, Author              
Rosenholm, Jarl B.1, Author
Blanchard, Juliette2, Author
Schüth, Ferdi2, Author              
Amenitsch, Heinz3, Author
Affiliations:
1Department of Physical Chemistry, Åbo Akademi University, Porthaninkatu 3-5, FIN-20500 Turku, Finland , ou_persistent22              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
3Institute of Biophysics and X-Ray Structure Research, Austrian Academy of Sciences, Steyrergasse 17/VI, A-8010 Graz, Austria , ou_persistent22              

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 Abstract: The influence of added short-chain amines, n-butylamine, BA, and n-octylamine, OA, on the mesophase formation of surfactant−silicate composite structures in a room-temperature synthesis has been investigated in situ by synchrotron small-angle X-ray scattering. For BA a marked decrease in the d spacing of the hexagonal phase was observed with increasing amine concentration, while a slight increase in d spacing was initially observed for OA. However, the d spacing of the hexagonal phase went through a maximum with increasing concentration. Furthermore, two coexisting hexagonal phases or a purely lamellar phase was observed if the concentration of OA was increased further. The results are discussed in terms of two competing mechanisms of amine incorporation:  solubilization within the CTAB−silicate mesophase and competitive adsorption of the amine to the silicate.

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Language(s): eng - English
 Dates: 2000-08-122000
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/la000402k
 Degree: -

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Title: Langmuir
Source Genre: Journal
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Publ. Info: Columbus, OH : American Chemical Society
Pages: - Volume / Issue: 16 (23) Sequence Number: - Start / End Page: 8809 - 8813 Identifier: ISSN: 0743-7463
CoNE: https://pure.mpg.de/cone/journals/resource/954925541194