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 surfactantSynthesisSurface properties 基金项目:国家自然科学基金项目（51472002）资助

作者	单位	E-mail
李阳阳	安徽大学化学化工学院 合肥 230601
潘忠稳	安徽大学化学化工学院 合肥 230601	ahpzw@163.com
周虹屏	安徽大学化学化工学院 合肥 230601
张庭兰	安徽大学化学化工学院 合肥 230601
储佳乐	安徽大学化学化工学院 合肥 230601

摘要点击次数:896 全文下载次数:0 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γ_cmc以及不同温度下的临界胶束浓度（CMC）计算表面活性参数（Γ_max、A_min、pc₂₀）与热力学参数（ΔG_m^θ、ΔH_m^θ、ΔS_m^θ）。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γ_cmc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 (Γ_max, A_min, pc₂₀) and the thermodynamics parameters (ΔG_m^θ, ΔH_m^θ, ΔS_m^θ) were calculated by measuring the surface tension (γ_cmc) 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(γ_cmc) 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. 查看全文查看/发表评论下载PDF阅读器 相关附件：版权转让声明书附件1 -->