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  Dilute lamellar and L3 phases in the binary water–C12E5 system.

Strey, R., Schomaecker, R., Roux, D., Nallet, F., & Olsson, U. (1990). Dilute lamellar and L3 phases in the binary water–C12E5 system. Journal of the Chemical Society-Faraday Transactions, 86(12), 2253-2261. doi:10.1039/FT9908602253.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-0DAA-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-37C2-A
Genre: Journal Article

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602970.pdf (Publisher version), 2MB
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Strey, R.1, Author              
Schomaecker, R.1, Author              
Roux, D., Author
Nallet, F., Author
Olsson, U., Author
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1Abteilung Kinetik der Phasenbildung, MPI for biophysical chemistry, Max Planck Society, ou_578549              

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 Abstract: The binary phase diagram of water–C12E5 has been studied with emphasis on the L3 and dilute lamellar phases, which were found to swell to approximately 99.5 and 98.8 wt % of water, respectively, much further than has been reported previously. Focusing on these two phases, we have carried out static light and small-angle neutron scattering and electrical conductivity measurements. The repeat distance in the lamellar phase was found to exceed 3000 Å. A small, but significant deviation from ideal one-dimensional swelling was observed. This deviation may be explained in terms of flexibility of the bilayers that are flat only on average. Electrical conductivity and small-angle neutron scattering data from the isotropic L3 phase are, over most of the stability range, consistent with a three-dimensional continuous bilayer structure. However, at large water contents an increase in the conductivity indicates a breakup of the structure into smaller fragments. Our results show that the simpler binary system exhibits the same characteristic features as the more complex multicomponent systems, involving brine, ionic surfactant and cosurfactant.

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Language(s): eng - English
 Dates: 1990-06-21
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1039/FT9908602253
ISI: A1990DK16600028
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Title: Journal of the Chemical Society-Faraday Transactions
Source Genre: Journal
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Pages: - Volume / Issue: 86 (12) Sequence Number: - Start / End Page: 2253 - 2261 Identifier: ISSN: 0956-5000