Kinetics of cosurfactant-surfactant-silicate phase behavior. 2. Short-chain amines

Patrik Ågren; Mika Lindén; Jarl B. Rosenholm; Juliette Blanchard; Ferdi Schüth; Heinz Amenitsch

doi:10.1021/la000402k

Kinetics of cosurfactant-surfactant-silicate phase behavior. 2. Short-chain amines

Patrik Ågren, Mika Lindén, Jarl B. Rosenholm, Juliette Blanchard, Ferdi Schüth, Heinz Amenitsch

Laboratory of Molecular Science and Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

34 Citations (Scopus)

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.

Original language	English
Pages (from-to)	8809-8813
Number of pages	5
Journal	Langmuir
Volume	16
Issue number	23
DOIs	https://doi.org/10.1021/la000402k
Publication status	Published - 2000
MoE publication type	A1 Journal article-refereed

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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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T1 - Kinetics of cosurfactant-surfactant-silicate phase behavior. 2. Short-chain amines

AU - Ågren, Patrik

AU - Lindén, Mika

AU - Rosenholm, Jarl B.

AU - Blanchard, Juliette

AU - Schüth, Ferdi

AU - Amenitsch, Heinz

PY - 2000

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N2 - 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.

AB - 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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Kinetics of cosurfactant-surfactant-silicate phase behavior. 2. Short-chain amines

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