Starvaggi Nicholas C, Bradford B Jack, Taylor Cameron D L, Pentzer Emily B
Dept. of Chemistry, Texas A&M University, College Station, TX 77843, USA.
Dept. of Materials Science & Engineering, Texas A&M University, College Station, TX 77843, USA.
Soft Matter. 2023 Oct 11;19(39):7635-7643. doi: 10.1039/d3sm00860f.
Pickering emulsions play a significant role in generating advanced materials and have widespread application in personal care products, consumer goods, crude oil refining, energy management, Herein, we report a class of wettability tuned silica-based Pickering emulsifiers which stabilize a diverse range of fluid-fluid interfaces: oil/water, ionic liquid/oil, and oil/oil, and their use to prepare microcapsules interfacial polymerization. To alter particle wettability, colloidal suspensions of SiO particles (22 nm) were modified silanization with reagents of varied hydrophilicity/hydrophobicity, giving particles that could be dispersed in solvents that became the continuous phase of the emulsions. To test the viability of this system as templates for the fabrication of composite materials, the different particle-stabilized emulsions were coupled with interfacial polymerization, leading to microcapsules with polyurea/silica shells. These results demonstrate that a single particle feedstock can be coupled with fundamental chemical transformation to access a versatile toolkit for the stabilization of diverse fluid interfaces and serve as a template for the preparation of hybrid architectures.
皮克林乳液在先进材料的制备中发挥着重要作用，并且在个人护理产品、消费品、原油精炼、能源管理等领域有着广泛的应用。在此，我们报道了一类通过调节润湿性的二氧化硅基皮克林乳化剂，它们能够稳定多种流体 - 流体界面，如油/水、离子液体/油和油/油界面，以及它们在通过界面聚合法制备微胶囊方面的应用。为了改变颗粒的润湿性，对二氧化硅颗粒（22纳米）的胶体悬浮液用具有不同亲水性/疏水性的试剂进行硅烷化改性，得到的颗粒能够分散在成为乳液连续相的溶剂中。为了测试该体系作为制备复合材料模板的可行性，将不同颗粒稳定的乳液与界面聚合相结合，得到了具有聚脲/二氧化硅壳的微胶囊。这些结果表明，单一的颗粒原料可以与基本的化学转化相结合，从而获得用于稳定多种流体界面的通用工具包，并作为制备混合结构的模板。
