Details
| Original language | English |
|---|---|
| Pages (from-to) | 7811-7819 |
| Number of pages | 9 |
| Journal | LANGMUIR |
| Volume | 20 |
| Issue number | 18 |
| Early online date | 5 Aug 2004 |
| Publication status | Published - 31 Aug 2004 |
| Externally published | Yes |
Abstract
Highly organized mesoporous silica monoliths were reproducibly prepared by nanocasting mixtures of fluorinated nonionic surfactants and micelles of two hydrocarbon block copolymers. It is the special feature of this fluorocarbon/hydrocarbon template mixture that they form not mixed micelles but individual micelles instead. By careful analysis of the pore architectures by gas sorption measurements and transmission electron microscopy in dependence on the relative template concentration, two different situations could be identified: (a) mesoscopically demixed samples and (b) mixed micellar phases where the two different micelles are packed in some type of organized alloy phase. Besides identification of such mixed phases for the first time for fluorocarbon/hydrocarbon mixtures, the resulting porous systems with controlled bimodal pore size distribution might be interesting from a materials perspective.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Chemistry(all)
- Spectroscopy
- Chemistry(all)
- Electrochemistry
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In: LANGMUIR, Vol. 20, No. 18, 31.08.2004, p. 7811-7819.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mixed micellar phases of nonmiscible surfactants
T2 - Mesoporous silica with bimodal pore size distribution via the nanocasting process
AU - Groenewolt, Matthijs
AU - Antonietti, Markus
AU - Polarz, Sebastian
PY - 2004/8/31
Y1 - 2004/8/31
N2 - Highly organized mesoporous silica monoliths were reproducibly prepared by nanocasting mixtures of fluorinated nonionic surfactants and micelles of two hydrocarbon block copolymers. It is the special feature of this fluorocarbon/hydrocarbon template mixture that they form not mixed micelles but individual micelles instead. By careful analysis of the pore architectures by gas sorption measurements and transmission electron microscopy in dependence on the relative template concentration, two different situations could be identified: (a) mesoscopically demixed samples and (b) mixed micellar phases where the two different micelles are packed in some type of organized alloy phase. Besides identification of such mixed phases for the first time for fluorocarbon/hydrocarbon mixtures, the resulting porous systems with controlled bimodal pore size distribution might be interesting from a materials perspective.
AB - Highly organized mesoporous silica monoliths were reproducibly prepared by nanocasting mixtures of fluorinated nonionic surfactants and micelles of two hydrocarbon block copolymers. It is the special feature of this fluorocarbon/hydrocarbon template mixture that they form not mixed micelles but individual micelles instead. By careful analysis of the pore architectures by gas sorption measurements and transmission electron microscopy in dependence on the relative template concentration, two different situations could be identified: (a) mesoscopically demixed samples and (b) mixed micellar phases where the two different micelles are packed in some type of organized alloy phase. Besides identification of such mixed phases for the first time for fluorocarbon/hydrocarbon mixtures, the resulting porous systems with controlled bimodal pore size distribution might be interesting from a materials perspective.
UR - http://www.scopus.com/inward/record.url?scp=4444364754&partnerID=8YFLogxK
U2 - 10.1021/la049147k
DO - 10.1021/la049147k
M3 - Article
AN - SCOPUS:4444364754
VL - 20
SP - 7811
EP - 7819
JO - LANGMUIR
JF - LANGMUIR
SN - 0743-7463
IS - 18
ER -