Abstract

In this study, Janus nanosheets are synthesized using a spontaneous process at the oil/water interface based on the corporation of (3-Aminopropyl) triethoxysilane and tetraethyl orthosilicate molecules in the formation reaction of plate shape silica nanoparticles. The presence of acidic/alkali catalyst in the water phase increases the reaction rate at the proximity of the interface. Cooling down the system after a specific time causes the melted paraffin (oil phase) to solidify which completely stops the reaction and entraps the formed nanosheets at the interface. Considering the enrichment of the oil and water phases with the reactants and catalyst, respectively, it is possible to reuse them multiple times after harvesting the formed silica Janus nanosheets. The amine groups at one side and the ethoxy groups on the other side of the silica Janus nanosheets help them to serve perfectly as solid emulsifiers in Pickering emulsions.

摘要

在这项研究中，基于（3-氨基丙基）三乙氧基硅烷和原硅酸四乙酯分子在板状二氧化硅纳米粒子的形成反应中的结合，在油/水界面使用自发过程合成了 Janus 纳米片。水相中酸/碱催化剂的存在提高了界面附近的反应速率。在特定时间后冷却系统会导致熔化的石蜡（油相）凝固，从而完全停止反应并在界面处截留形成的纳米片。考虑到油相和水相分别富含反应物和催化剂，可以在收获形成的二氧化硅 Janus 纳米片后多次重复使用它们。