Adsorption of MultiLamellar tubes with a temperature tunable diameter at the air-water interface: a process driven by the bulk properties

Abstract : The behavior at the air/water interface of multilamellar tubes made of the ethanolamine salt of the 12-hydroxy stearic acid as a function of the temperature has been investigated using Neutron Reflectivity. Those tubes are known to exhibit a temperature tunable diameter in the bulk. We have observed multilamellar tubes adsorbed at the air/water interface by specular neutron reflectivity. Interestingly, at the interface, the adsorbed tubes exhibit the same behavior than in the bulk upon heating. There is however a peculiar behavior at around 50°C for which the increase of the diameter of the tubes at the interface yields an unfolding of those tubes into a multilamellar layer. Upon further heating, the tubes re-fold and their diameter re-decrease after what they melt as observed in the bulk. All structural transitions at the interface are nevertheless shown to be quasi-completely reversible. This provides to the system a high interest for its interfacial properties because the structure at the air/water interface can be tuned easily by the temperature.
Complete list of metadatas

Cited literature [19 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00737510
Contributor : François Boué <>
Submitted on : Tuesday, October 2, 2012 - 8:52:01 AM
Last modification on : Thursday, February 20, 2020 - 7:21:42 PM
Long-term archiving on: Friday, December 16, 2016 - 7:34:29 PM

File

Fameau_et_al_Adsorption_generi...
Files produced by the author(s)

Identifiers

Collections

Citation

François Boué, Anne-Laure Fameau, Jean-Paul Douliez, Frédéric Ott, Bruno Novales, et al.. Adsorption of MultiLamellar tubes with a temperature tunable diameter at the air-water interface: a process driven by the bulk properties. Journal of Colloid and Interface Science, Elsevier, 2011, 362 (2), pp.397-405. ⟨10.1016/j.jcis.2011.06.080⟩. ⟨hal-00737510⟩

Share

Metrics

Record views

289

Files downloads

143