| 李阳阳,潘忠稳,周虹屏,张庭兰,储佳乐.化学通报,2020,83(1):75-79. |
| 新型脲基双子表面活性剂的合成及其性能 |
| Syntheses and Properties of Novel Urea-based Gemini Surfactants |
| 投稿时间：2019-08-16 修订日期：2019-09-13 |
| DOI： |
| 中文关键词: 脲基双子表面活性剂 合成 表面性质 |
| 英文关键词:Urea-based Gemini surfactant Synthesis Surface properties |
| 基金项目:国家自然科学基金项目（51472002）资助 |
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| 中文摘要: |
| 以N，N-二甲基-1，3-丙二胺、固体光气、溴代烷为原料合成了三种新型含脲基双子表面活性剂（LY-12、LY-14、LY-16），并通过1H NMR、ESI-MS和FT-IR表征了结构。测定了其Krafft点、乳化性能、起泡性能；通过测定表面张力γcmc以及不同温度下的临界胶束浓度（CMC）计算表面活性参数（Γmax、Amin、pc20）与热力学参数（ΔGmθ、ΔHmθ、ΔSmθ）。结果表明，LY-12、LY-14的Krafft点低于0℃，LY-16的Krafft点低于10℃；LY-12、LY-14、LY-16的乳化时间分别为173、275和338 s；LY-12的起泡性显著优于LY-14和LY-16；三种表面活性剂的表面张力γcmc分别为38.77、37.42和36.59 mN/m；298.15K条件下，其CMC值分别为0.19、0.15、0.13 mmol/L。表面活性参数与热力学参数计算表明，三种表面活性剂均具有高的表面活性且胶束的形成是熵驱动的自发放热过程。 |
| 英文摘要: |
| Three novel urea-based Gemini surfactants (LY-12, LY-14, LY-16) were synthesized using N,N-dimethyl-1,3-propanediamine, triphosgene and bromoalkanes as raw materials. The structure was characterized by 1H NMR, ESI-MS and FT-IR, and the Krafft point, emulsifying properties and foaming properties were measured. The surface activity parameters (Γmax, Amin, pc20) and the thermodynamics parameters (ΔGmθ, ΔHmθ, ΔSmθ) were calculated by measuring the surface tension (γcmc) and the critical micelle concentration (CMC) at different temperatures. The results showed that the Krafft points of LY-12 and LY-14 were all below 0℃, and the Krafft point of LY-16 is lower than 10℃; the emulsification time of LY-12, LY-14 and LY-16 were 173, 275 and 338 s, respectively. The foaming ability of LY-12 was significantly higher than those of LY-14 and LY-16. The surface tension(γcmc) were 38.77, 37.42 and 36.59 mN/m, and the CMC value were 0.19, 0.15, 0.13 mmol/L at 298.15 K, respectively. All the three surfactants had high surface activity, and the formation of micelles was an entropy-driven self-heating process. |
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