Neutron Reflectometry of an Anionic Surfactant at the Solid-LiquidInterface under Shear

作者：Welbourn Rebecca J L^*; Bartholomew Felicity; Gutfreund Philipp; Clarke Stuart M

来源：Langmuir, 2017, 33(24): 5982-5990.

DOI：10.1021/acs.langmuir.7b00530

Neutron reflectometry with in situ rheology is used to measure the shear response of an adsorbed anionic surfactant (sodium bis(2-ethylhexyl) sulfosuccinate, AOT) at the alumina-water interface. A low surfactant concentration is measured where a single bilayer adsorbs at the interface as well as a higher concentration where a multilamellar structure forms. The low concentration structure does not change with the imposed shear (oscillatory or steady). However, the lamellar phase shows a loss of structure under both steady and oscillatory shear. There are differences between the steady and oscillatory cases, which are discussed, with both showing a strong dependence on the strain amplitude.

• 出版日期2017-6-20