Three tetrasiloxane-tailed cationic gemini surfactants: The effect of different spacer rigidity on surface properties and aggregation behaviors
作者:Cai-Ping Chen、Feng Lu、Qing-Xiao Tong
DOI:10.1016/j.molliq.2018.06.112
日期:2018.9
tetrasiloxane Gemini surfactants MR8M, MDM, MDOM were designed and synthesized by a simple process. Their surface property, hydrolysis resistance ability, wetting ability, aggregation behavior as well as antibacterial activity in aqueous solutions were studied. These three surfactants exhibited high hydrolysis resistance in both acidic and neutral aqueous solutions. On one hand, surface tension of MR8M
带有四硅氧烷尾的Gemini阳离子表面活性剂具有在一系列应用中改善性能和生物相容性的潜力。使用不同的刚性垫片,结构对其自组装行为和界面性能的影响是显而易见的。因此,应该可以通过改变间隔物的刚度来调节水溶液中的系统表面性质和聚集形态。通过简单的工艺设计和合成了一系列新型的阳离子四硅氧烷双子表面活性剂MR8M,MDM,MDOM。研究了它们的表面性质,抗水解能力,润湿能力,聚集行为以及在水溶液中的抗菌活性。这三种表面活性剂在酸性和中性水溶液中均显示出高抗水解性。一方面,MR8M(γCMC = 19 mN / m的)和MDOM(γ CMC = 23 mN / m的),比显著降低C 8 -PSi-C 8(γ CMC = 37 mN / m的)与硅氧烷间隔物和纯烃等同物。另一方面,MR8M可以以低浓度(0.4 mM)完全润湿高度疏水的PTEF板。另外,观察到不同的聚集体,仅具有囊泡的MDM,具有