新双子座季铵盐表面活性剂的绿色合成，表面活性，胶束聚集和缓蚀性能,Journal of Chemical & Engineering Data

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新双子座季铵盐表面活性剂的绿色合成，表面活性，胶束聚集和缓蚀性能
Journal of Chemical & Engineering Data ( IF 2.1 ) Pub Date : 2018-04-30 , DOI: 10.1021/acs.jced.7b00911
Hongqin Liu , Xiqin Zhou , Xiaoxu Zhang , Guoying Shi , Jun Hu , Changyao Liu , Baocai Xu

一系列新的双酰胺季铵盐表面活性剂，含酰胺基，分子式为C _n H _{2 n +1} CONH（CH ₂）₂ N ⁺（CH ₃）₂（CH ₂）₂ N ⁺（CH ₃）₂（CH ₂）₂ NHCOC _n H _{2 n +1} ·2CH ₃ CO ₃^–（n通过使用绿色试剂碳酸二甲酯已经合成了（＝ 11、13、15、17）。这些表面活性剂的结构通过傅里叶变换红外光谱，¹ H NMR，¹³ C NMR和质谱确认。通过表面张力，电导率，稳态荧光，动态光散射和透射电子显微镜测量研究了它们的表面活性和聚集性质。结果表明，在浓度为0.256 mmol·kg ^{–1的条件下}，这些合成的双子星座季铵盐表面活性剂可将水的表面张力降低至最小值28.21 mN·m ^–1。并自发自组装成双层聚集体，这些聚集体主要是单室囊泡和多层囊泡。此外，随着烷基链长度的增加，其临界胶束浓度值和抗衡离子结合度（β）降低；并且自发形成囊泡的趋势和胶束聚集数（N _m）增加。还发现它们是A3钢在酸性溶液中的有效腐蚀抑制剂。

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Green Synthesis, Surface Activity, Micellar Aggregation, and Corrosion Inhibition Properties of New Gemini Quaternary Ammonium Surfactants

A new series of gemini quaternary ammonium surfactants containing amide groups with the formula C_nH_2n+1CONH(CH₂)₂N⁺(CH₃)₂(CH₂)₂ N⁺(CH₃)₂(CH₂)₂NHCOC_nH_2n+1·2CH₃CO₃^– (n = 11, 13, 15, 17) have been synthesized by the using green reagent dimethyl carbonate. The structures of these surfactants were confirmed by Fourier transform infrared spectroscopy, ¹H NMR, ¹³C NMR, and mass spectra. Their surface activities and aggregation properties were investigated by surface tension, conductivity, steady-state fluorescence, dynamic light scattering, and transmission electron microscope measurements. The results show that these synthesized gemini quaternary ammonium surfactants reduce the surface tension of water to a minimum value of 28.21 mN·m^–1 at a concentration of 0.256 mmol·kg^–1 and self-assemble spontaneously into double layer aggregates which are mostly single-room vesicles and multilamellar vesicles. Furthermore, with increasing alkyl chain length, their critical micelle concentration values and the degree of counterion binding (β) decrease; and the spontaneous tendency of vesicle formation and the micellar aggregation numbers (N_m) increase. They are also found to be effective corrosion inhibitors for A3 steel in acid solution.

更新日期：2018-05-01

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