Stability of near-surface ordering of bicontinuous microemulsions in external shear-fields

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:534

Article

Lipfert, Frederik^1,2  Kerscher, Michael^1,3  Mattauch, Stefan¹  Frielinghaus, Henrich¹ 

[1] Forschungszentrum Julich, Julich Ctr Neutron Sci MLZ, Lichtenbergstr 1, D-85747 Garching, Germany

[2] Etral GmbH, Zillenweg 9, D-83115 Neubeuren, Germany

[3] Wacker Chem, Franz Alexander Str 7, D-84489 Burghausen, Germany

关键词: Microemulsion;    Near surface ordering;    Shear field;    Lubrication effect;    Grazing incidence neutron scattering;    Neutron reflectometry;   

DOI  :  10.1016/j.jcis.2018.09.014

来源: Elsevier

【 摘 要 】

The lubrication effect of bicontinuous microemulsions describes a facilitated flow along hydrophilic planar surfaces because the fluid forms lamellar domains that can slide off along each other much better than randomly ordered domains. The applicability of this effect is based on the prerequisite of the lamellar structure not being destroyed by external shear-fields. In this paper, we demonstrate that the lamellar structure is highly stable for shear rates of up to 600 s(-1) using neutron reflectivity and grazing incidence small angle neutron scattering experiments. The transition structure that consists of perforated lamellae is attacked by the flow, and the bicontinuous microemulsion comes closer to the solid interface when shear is applied. All of this verifies the stability of the lubrication effect for technical applications. (C) 2018 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

【 授权许可】

Free