氟碳化合物
表面张力
肺表面活性物质
化学
临界胶束浓度
非离子表面活性剂
胶束
化学工程
高分子化学
热扩散率
有机化学
热力学
水溶液
生物化学
物理
工程类
作者
Ruiguo Wang,Lei Song,Yuan Guo,Junjie Kou,Hongjian Song,Yuxiu Liu,Jingjing Zhang,Qingmin Wang
标识
DOI:10.1016/j.molliq.2020.114486
摘要
The biodegradability of fluorinated surfactants can be improved by reducing the length of the fluorocarbon chain. In this study, ten new nonionic fluorinated surfactants with various hydrophilic and hydrophobic chain lengths were synthesized by means of substitution and ring-opening reactions using methoxypolyethylene glycols (mPEGs) or 2-methoxyethanol, epibromohydrin, and perfluoroalkyl alcohols as raw materials. We measured the static and dynamic surface tension of the synthesized surfactants and used the resulting data to develop structure–activity relationships. We found that mPEG molecular weight was the main determinant of minimum surface tension, and the number of fluorocarbon atoms was the main determinant of critical micelle concentration. Diffusivity decreased with increasing number of fluorocarbon atoms but increased with increasing mPEG molecular weight. Surfactant 5i showed the best performance, lowering the surface tension of water to 17.89 mN/m.
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