环保型油酸基双子表面活性剂流变行为

Rheological Behavior of Eco-friendly Oleic Acid-based Pseudo-dimeric Surfactants

传统的双子表面活性剂具有多样的自组装聚集行为和优异的流变学性质,应用前景十分广阔,但是繁琐的合成路线和复杂的纯化过程阻碍了双子表面活性剂的发展.近几年来,利用非共价键相互作用构造低聚表面活性剂引起广泛关注.通过二聚季铵盐(Bola n)与绿色环保的油酸钠之间的静电相互作用构造油酸基双子表面活性剂,研究了其流变行为.结果表明,该系列表面活性剂随着溶液浓度的增加,黏弹性能加强,这与传统的双子表面活性剂性质相似;二聚季铵盐中间亚甲基的碳链长度,可以调控流变学性质.

Traditional dimeric surfactants exhibit a variety of self-assembled aggregation behaviors and excellent rheological properties.It has broad application potential,but the complicated synthesis route and the complex purification process hinder the development of dimeric surfactants.In recent years,the use of non-covalent interactions to construct pseudo-oligomeric surfactants has attracted extensive attention.A dynamic oleic acid-based pseudo-dimeric surfactant is made through electrostatic interaction between dimeric quaternary ammonium salts and the environmentally friendly sodium oleate.The series of surfactants showed higher viscoelasticity with increasing concentration,which is similar to the traditional dimeric surfactants.The rheological properties can be flexibly modulated by controlling the middle spacer length of the dimeric quaternary ammonium salt.