Aono Keita, Suzuki Furitsu, Yomogida Yoshihiro, Hasumi Motomitsu, Kado Shinpei, Nakahara Yoshio, Yajima Setsuko
Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University, 930 Sakae-dani, Wakayama 640-8510, Japan.
Kao Corporation, 1334 Minato, Wakayama 640-8580, Japan.
Langmuir. 2020 Sep 1;36(34):10043-10050. doi: 10.1021/acs.langmuir.0c01109. Epub 2020 Aug 18.
The present study investigates the effects of very low concentrations of polypropylene glycol (PPG) on the rheological properties of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) aqueous solutions at the surface for the precise control of foam properties. Langmuir trough experiments and Brewster angle microscopy (BAM) of the AOT monolayer on the surfaces of PPG aqueous solutions indicated that a very low concentration of PPG increased the number of AOT molecules at the surface. Viscoelastic behaviors at the surface and surface tension isotherms in mixed aqueous solutions of AOT and PPG revealed that AOT interacted with PPG in the surface and bulk phase. A modified Ross-Miles method was performed to assess the foam stabilities of AOT aqueous solutions with and without PPG. The stabilization of foam by PPG was attributed to the rheological properties of AOT aqueous solutions at the surface.
本研究考察了极低浓度的聚丙二醇（PPG）对双（2-乙基己基）磺基琥珀酸钠（AOT）水溶液表面流变学性质的影响，以实现对泡沫性质的精确控制。在PPG水溶液表面进行的AOT单分子层的Langmuir槽实验和布鲁斯特角显微镜（BAM）表明，极低浓度的PPG增加了表面AOT分子的数量。AOT和PPG混合水溶液的表面粘弹性行为及表面张力等温线表明，AOT在表面和本体相中与PPG相互作用。采用改进的Ross-Miles法评估了含和不含PPG的AOT水溶液的泡沫稳定性。PPG对泡沫的稳定作用归因于AOT水溶液在表面的流变学性质。
