日用化学工业（中英文）2025，Vol.55Issue(10)：1252-1259,8.DOI:10.3969/j.issn.2097-2806.2025.10.004
由双链表面活性剂和二氧化硅纳米颗粒协同稳定的非水乳状液及其性能
Non-aqueous Pickering emulsions synergistically stabilized by double tailed surfactants and silica nanoparticles
摘要
Abstract
Non-aqueous emulsions have a wide range of applications in cosmetics,drug-controlled release,and the preparation of functional nanoparticles.However,due to the weaker polarity of non-aqueous solvents,these emulsions often exhibit inferior stability compared to their aqueous counterparts.In this experiment,the properties of quaternary ammonium surfactants in glycerol were investigated through surface tension measurements,to further enhance the stability of n-decane/glycerol emulsions,hydrophilic nanoparticles SiO2 were modified in situ using double tailed quaternary ammonium surfactants Di-C12DAB and Di-C16DAB.Stable n-decane/glycerol Pickering emulsions were successfully prepared.These emulsions were stable at 45℃for over six months,and no significant changes in droplet size occurred.The minimum droplet size of the emulsion was only 2-3 μm.Contact angle measurements showed that the wettability of the silica surface was tremendously affected by the concentration and the alkyl chain length of the double-tailed surfactants.In the presence of Di-C12DAB,the contact angle of glycerol on the silica surface increased monotonically with the surfactant concentration.This explains the phenomenon that the Pickering emulsions containing Di-C12DAB and silica particles were stable within the contact angle range of 80°-120°.Comparatively,the contact angle of the glycerol on the silica surface in the presence of Di-C16DAB first increased with surfactant concentrations and then decreased,reaching a maximum at 0.6 mmol/L.It can be concluded that Di-C12DAB formed monolayers at the surface of silica particles within all investigated concentrations.On the contrary,Di-C16DAB formed monolayers at concentrations below 0.6 mmol/L and formed double layers at concentrations above 0.6 mmol/L,leading to a non-monotonic change in the contact angle with respect to concentration.Using these stable non-aqueous Pickering emulsions as templates,polymer microspheres with a particle size of 2-3 μm were successfully prepared with high yield.This work is helpful to expand the potential applications of non-aqueous emulsions in the encapsulation of drug,controlled release,material preparation,and cosmetic formulations.关键词
非水乳状液/Pickering乳状液/稳定性/双链表面活性剂Key words
non-aqueous emulsions/Pickering emulsions/stability/double tailed surfactant分类
化学化工引用本文复制引用
孙雨石,陈钊,崔正刚,裴晓梅,宋冰蕾..由双链表面活性剂和二氧化硅纳米颗粒协同稳定的非水乳状液及其性能[J].日用化学工业（中英文）,2025,55(10):1252-1259,8.基金项目
国家自然科学基金资助项目(22272063) （22272063）
