Penfold Jeffrey, Thomas Robert K, Li Peixun X, Petkov Jordan T, Tucker Ian, Webster John R P, Terry Ann E
†Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, United Kingdom.
‡Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, United Kingdom.
Langmuir. 2015 Mar 17;31(10):3003-11. doi: 10.1021/acs.langmuir.5b00151. Epub 2015 Mar 4.
The Tween nonionic surfactants are ethoxylated sorbitan esters, which have 20 ethylene oxide groups attached to the sorbitan headgroup and a single alkyl chain, lauryl, palmityl, stearyl, or oleyl. They are an important class of surfactants that are extensively used in emulsion and foam stabilization and in applications associated with foods, cosmetics and pharmaceuticals. A range of ethoxylated polysorbate surfactants, with differing degrees of ethoxylation from 3 to 50 ethylene oxide groups, have been synthesized and characterized by neutron reflection, small-angle neutron scattering, and surface tension. In conjunction with different alkyl chain groups, this provides the opportunity to modify their surface properties, their self-assembly in solution, and their interaction with macromolecules, such as proteins. Adsorption at the air-water and oil-water interfaces and solution self-assembly of the range of ethoxylated polysorbate surfactants synthesized are presented and discussed.
吐温非离子表面活性剂是乙氧基化失水山梨醇酯，其在失水山梨醇头部基团上连接有20个环氧乙烷基团以及一条单一的烷基链，月桂基、棕榈基、硬脂基或油基。它们是一类重要的表面活性剂，广泛用于乳液和泡沫稳定以及与食品、化妆品和药品相关的应用中。一系列具有3至50个环氧乙烷基团不同乙氧基化程度的乙氧基化聚山梨醇酯表面活性剂已通过中子反射、小角中子散射和表面张力进行了合成和表征。结合不同的烷基链基团，这为改变它们的表面性质、在溶液中的自组装以及它们与大分子（如蛋白质）的相互作用提供了机会。本文介绍并讨论了合成的一系列乙氧基化聚山梨醇酯表面活性剂在气-水和油-水界面的吸附以及溶液自组装情况。
