|
| volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 1 van 14 gevonden artikelen
| Titel: |
A new approach to lamellar phases (Lα) in water - non-ionic surfactant systems |
| Auteur: |
Stubenrauch, C. Burauer, S. Strey, R. Schmidt, C. |
| Verschenen in: |
Liquid crystals |
| Paginering: | Jaargang 31 (2004) nr. 1 pagina's 39-53 |
| Jaar: |
2004-01 |
| Inhoud: |
We present new results on two unusual features concerning lamellar phases (Lα) in binary aqueous solutions of non-ionic surfactants. The first striking feature is the formation of highly dilute Lα phases down to 1 wt % of surfactant, which has been observed for a small number of non-ionic surfactants which are all of the alkyl polyglycol ether (CiEj) type. So far, in binary H2O - CiEj systems either the absence or the presence of a dilute Lα phase has been reported. In the latter case, the dilute and the concentrated Lα phase are always connected continuously. However, for one particular silane surfactant, namely (CH3)3Si(CH2)6(OCH2CH2)5OCH3, two disconnected Lα phases were observed. Systematic investigations of the phase behaviour of the binary H2O - C10E4 system as well as of the pseudobinary H2O - C10E4/C10E5 systems enabled us to conclude that: (a) the disconnected Lα phase is a general feature of non-ionic surfactants and (b) there are no structural differences between the connected and the disconnected Lα phases. We propose a mechanism for the disconnection of the Lα phase. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 1 van 14 gevonden artikelen
| volgende >> |