A novel short fluorocarbon chain cationic surfactant has been synthesized to reduce the bioaccumulation of traditional fluorocarbon surfactants and maintain excellent surface properties simultaneously. The structure, surface activity, and micelle formation of surfactants have been investigated by surface tension, conductivity, dynamic light scattering, steady‐state fluorescence, Fourier transform infrared spectroscopy, and Nuclear magnetic resonance. The novel surfactant (yield more than 81%) exhibited good surface activity, the critical micelle concentration and surface tension were below 2.35 mmol L⁻¹ and 20.54 mN m⁻¹ in the range of temperature from 288 to 303 K, respectively. The surface tension decreased to 17.45 mN m⁻¹ with an increase in temperature. The thermodynamic parameters (, and ) of micellization for surfactants were evaluated, which implying the micellization process was contributed primarily by the entropy driving. In addition, the aggregation behavior of surfactants was also studied in detail, which demonstrated a small micelle aggregation number of 9.40 and large size distribution of 164–342 nm.

中文翻译：

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新型短氟碳链阳离子表面活性剂的合成与表征

合成了新型的短碳氟链阳离子表面活性剂，以减少传统碳氟表面活性剂的生物蓄积并同时保持出色的表面性能。通过表面张力，电导率，动态光散射，稳态荧光，傅里叶变换红外光谱和核磁共振研究了表面活性剂的结构，表面活性和胶束形成。新型表面活性剂（收率超过81％）表现出良好的表面活性，临界胶束浓度和表面张力在288至303 K的温度范围内分别低于2.35 mmol L ^-1和20.54 mN m ^-1。表面张力降低至17.45 mN m ^-1随着温度升高。热力学参数（，和胶束为表面活性剂的）进行了评价，这暗示胶束化过程是由熵驱动主要贡献。此外，还对表面活性剂的聚集行为进行了详细研究，结果表明胶束聚集数小，为9.40，粒径分布大，为164-342 nm。