Li Peixun, Penfold Jeffery, Thomas Robert K, Xu Hui
STFC, Rutherford-Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0RA, United Kingdom.
Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford, OX1 3QZ, United Kingdom.
Adv Colloid Interface Sci. 2019 Jul;269:43-86. doi: 10.1016/j.cis.2019.04.002. Epub 2019 Apr 19.
The structure and occurrence of multilayered adsorption at the air-water interface of surfactants in combination with other oppositely charged species is reviewed. The main species that trigger multilayer formation are multiply charged metal, oligo- and polyions. The structures vary from the attachment of one or two more or less complete surfactant bilayers to the initial surfactant monolayer at the air-water interface to the attachment of a greater number of bilayers with a more defective structure. The majority of the wide range of observations of such structures have been made using neutron reflectometry. The possible mechanisms for the attraction of surfactant bilayers to an air-water interface are discussed and particular attention is given to the question of whether these structures are true equilibrium structures.
综述了表面活性剂与其他带相反电荷的物质在气-水界面处多层吸附的结构和出现情况。引发多层形成的主要物质是多价金属、寡聚离子和聚离子。结构从在气-水界面处一个或两个或多或少完整的表面活性剂双层附着到初始表面活性剂单层，到附着更多结构更有缺陷的双层不等。对这类结构的广泛观察大多是使用中子反射法进行的。讨论了表面活性剂双层吸附到气-水界面的可能机制，并特别关注这些结构是否为真正平衡结构的问题。
