Adsorption of the Lamellar Phase of Aerosol-OT at the Solid/Liquid and Air/Liquid Interfaces
Adsorption of the Lamellar Phase of Aerosol-OT at the Solid/Liquid and Air/Liquid Interfaces
复制标题
气溶胶-OT 层状相在固/液和空气/液界面的吸附
DOI：
10.1021/jp9912859
复制
发表时间：
1999
影响因子：
3.3
通讯作者：
R. Cubitt
中科院分区：
文献类型：
--
作者：
Z. X. Li;A. Weller;R. Thomas;A. Rennie;J. Webster;and J. Penfold;R. Heenan;R. Cubitt
二-2-乙基己基磺基琥珀酸钠浓溶液（气溶胶-OT或AOT）在亲水性固体/水溶液和空气/水溶液界面上的吸附随后发生中子镜面反射。记录 D2O 中质子化 AOT 在浓度为 2 wt% 和 5 wt% 以及在一定温度范围内的反射率分布。观察到层状相的尖锐衍射峰特征，并且峰的重复间距对温度非常敏感。还使用中子小角散射研究了 0−65 °C 温度范围内该浓度范围内的体相图。对于含有 5 wt% AOT 的本体溶液，5 °C 时层状相的重复距离为 370 ± 30 A，在 35 °C 时降至该值的一半左右，在 65 °C 时仅为 115 A。随着AOT浓度的降低，片层间距减小；例如，在 15°C 下从 5 wt% 的 325 A 到 1 wt% 的 225 A。在某些浓度和温度范围内，衍射峰较窄...
The adsorption of concentrated solutions of di-2-ethylhexylsodium sulfosuccinate (Aerosol-OT or AOT) at hydrophilic solid/aqueous and air/aqueous solution interfaces was followed by neutron specular reflection. Reflectivity profiles were recorded of protonated AOT in D2O at concentrations of 2 and 5 wt % and over a range of temperatures. Sharp diffraction peaks characteristic of a lamellar phase were observed, and the repeat spacing of the peaks was very sensitive to temperature. The bulk phase diagram in this concentration range over the temperature range 0−65 °C was also studied using neutron small angle scattering. For the bulk solution containing 5 wt % AOT, the lamellar phase at 5 °C had a repeat distance of 370 ± 30 A, which dropped to about half that value at 35 °C, and to only 115 A at 65 °C. The lamellar spacing decreased as the AOT concentration was lowered; for example, from 325 A at 5 wt % to 225 A at 1 wt %, at 15 °C. Over some of the concentration and temperature range narrow diffraction pea...