This paper reported the synthesis of a novel quaternary surfactant (PFAS-Si) containing the C-F/Si-H double hydrophobic skeleton and the surface properties of its aqueous solution, which were investigated in comparison with those of the aqueous solutions of the fluorosurfactant (PFAS-IEt) and silicone surfactant (TMSAC) with similar hydrophobic chain structures. The critical micelle concentration (CMC) and the corresponding surface tension value (γ) of the PFAS-Si solution were 0.0612 mmol/L and 21.02 mN/m, respectively, which indicated that the PFAS-Si could substantially reduce the surface tension of water, and showed excellent surface activity. Meanwhile, the thermodynamic parameters of the micellization process, aggregation behavior, wettability, and foam properties of PFAS-Si solutions were systematically investigated. On the TEM negative staining photographs, it can be clearly seen that the aggregates of PFAS-Si in aqueous solution exhibit hollow spherical vesicles. In addition, the PFAS-Si solution exhibited superb wettability, and could achieve wetting of PTFE sheets at a very low concentration (0.168 mmol/L). Not only that, the PFAS-Si solution also had excellent foaming ability and foam stability. This work provided a new preparation idea for the development of high-performance specialty surfactants.

中文翻译：

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CF/Si-H双疏水主链季铵表面活性剂的表面活性、润湿性及泡沫性能


本文报道了一种新型含CF/Si-H双疏水骨架的四元表面活性剂(PFAS-Si)的合成及其水溶液的表面性质，并与含氟表面活性剂(PFAS-Si)的水溶液进行比较研究。 -IEt) 和有机硅表面活性剂 (TMSAC) 具有相似的疏水链结构。 PFAS-Si溶液的临界胶束浓度（CMC）和相应的表面张力值（γ）分别为0.0612 mmol/L和21.02 mN/m，这表明PFAS-Si可以显着降低水的表面张力，并表现出优异的表面活性。同时，系统研究了PFAS-Si溶液的胶束化过程的热力学参数、聚集行为、润湿性和泡沫性能。在TEM负染色照片上，可以清楚地看到水溶液中PFAS-Si的聚集体呈现出空心球形囊泡。此外，PFAS-Si溶液表现出优异的润湿性，可以在很低的浓度（0.168 mmol/L）下实现PTFE片材的润湿。不仅如此，PFAS-Si溶液还具有优异的发泡能力和泡沫稳定性。该工作为高性能特种表面活性剂的开发提供了新的制备思路。