The effect of amphiphilic polymers with a continuous amphiphilicity profile on the membrane properties in a bicontinuous microemulsions studied by neutron scattering

Klemmer, Helge F. M.; Ohl, Michael; Frielinghaus, Henrich; Holderer, Olaf; Allgaier, J.

doi:10.1088/1742-6596/862/1/012014

Journal Article

FZJ-2017-04285

The effect of amphiphilic polymers with a continuous amphiphilicity profile on the membrane properties in a bicontinuous microemulsions studied by neutron scattering

Klemmer, H. F. M. ; Frielinghaus, H.FZJ* ; Allgaier, J.FZJ* ; Ohl, M.FZJ* ; Holderer, O. (Corresponding author)FZJ*

2017
IOP Publ. Bristol

Journal of physics / Conference Series 862, 012014 - (2017) [10.1088/1742-6596/862/1/012014]

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Please use a persistent id in citations: http://hdl.handle.net/2128/14804 doi:10.1088/1742-6596/862/1/012014

Abstract: Microemulsion systems consisting of oil, water and surfactant have been studied with neutron scattering techniques. The amount of surfactant needed to form a microemulsion can be dramatically reduced by the addition of small amounts of amphiphilic block copolymers (boosting effect). Here, we studied the influence of block copolymers with gradually changing amphiphilicity from hydrophilic to hydrophobic. Small angle neutron scattering (SANS), neutron spin echo spectroscopy (NSE) and phase diagram measurements in combination give access to the elastic properties of the membrane. The underlying NSE experiments for this interpretation rely on smallest changes of the relaxation curves (of ca. 1% steps) for still small changes of the bending rigidity (of ca. 10% steps). This high reliability of the experiments conducted at the SNS-NSE displays the accuracy of the instrument itself and the latest developments of the evaluation software, which were necessary to interpret such tiny changes of the bending rigidity reliably.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Soft Condensed Matter (2nd)

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