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.

氟化表面活性剂的生物降解性可以通过减少碳氟化合物链的长度来提高。在这项研究中，使用甲氧基聚乙二醇（mPEG）或2-甲氧基乙醇，表溴醇和全氟烷基醇为原料，通过取代和开环反应合成了十种具有不同亲水和疏水链长的新型非离子氟化表面活性剂。我们测量了合成表面活性剂的静态和动态表面张力，并使用所得数据建立了结构-活性关系。我们发现，mPEG分子量是最小表面张力的主要决定因素，碳氟原子的数目是临界胶束浓度的主要决定因素。扩散系数随碳氟原子数目的增加而降低，但随mPEG分子量的增加而增加。表面活性剂5i表现出最佳性能，将水的表面张力降低至17.89 mN / m。