Controlling Oil-in-Oil Pickering-Type Emulsions Using 2D Materials as Surfactant
| Autor: | Bradley J. Rodier, Al de Leon, Emily Pentzer, Christina Hemmingsen |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Polymers and Plastics media_common.quotation_subject Oxide 02 engineering and technology 010402 general chemistry 01 natural sciences Cosmetics Nanomaterials Catalysis law.invention Inorganic Chemistry chemistry.chemical_compound Pulmonary surfactant law Materials Chemistry Organic chemistry Alkyl media_common chemistry.chemical_classification Graphene Organic Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Reagent 0210 nano-technology |
| Zdroj: | ACS macro letters. 6(11) |
| ISSN: | 2161-1653 |
| Popis: | Emulsions are important in numerous fields, including cosmetics, coatings, and biomedical applications. A subset of these structures, oil-in-oil emulsions, are especially intriguing for water sensitive reactions such as polymerizations and catalysis. Widespread use and application of oil-in-oil emulsions is currently limited by the lack of facile and simple methods for preparing suitable surfactants. Herein, we report the ready preparation of oil-in-oil emulsions using 2D nanomaterials as surfactants at the interface of polar and nonpolar organic solvents. Both the edges and basal plane of graphene oxide nanosheets were functionalized with primary alkyl amines and we demonstrated that the length of the alkyl chain dictates the continuous phase of the oil-in-oil emulsions (i.e., nonpolar-in-polar or polar-in-nonpolar). The prepared emulsions are stable at least 5 weeks and we demonstrate they can be used to compartmentalize reagents such that reaction occurs only upon physical agitation. The simplicity and scalability of these oil-in-oil emulsions render them ideal for applications impossible with traditional oil-in-water emulsions, and provide a new interfacial area to explore and exploit. |
| Databáze: | OpenAIRE |
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